2024-03-28T20:09:19Z
https://jurnal.ugm.ac.id/index/oai
oai:jurnal.ugm.ac.id:article/6671
2015-07-12T03:01:49Z
jag:ART
nmb a2200000Iu 4500
"090101 2009 eng "
2502-2822
2086-5104
dc
LATE OLIGOCENE THOLEIITIC LAVA FROM KENANGA RIVER, TEGALOMBO PACITAN, EAST JAVA
Sartika, Dian Novia
Warmada, I Wayan
Harahap, Bhakti H.
Soewondo, Widiasmoro
Watupatok Formation in Pacitan area consists of lava with basaltic composition and pillow structure. Kenanga river is only 5 km to southeast Watupatok village as type locality of this formation. Kenanga river’s lava were varying from diabasic with paving surface and columnar joint structure to basaltic composition with pillow structure. Lava were found as effusive flow and dike with sandstone inclusion. In field observation, lava exhibits strong porphiritic to aphyric texture, with vesicular to amygdaloidal structure. Plagioclase as phenocryst has mediumsized (2-4 mm) surrounded by volcanic glass as groundmass. Petrographic analysis shows intersertal to hyalophilitic texture, consist of plagioclase, pyroxene and opaque minerals as phenocryst and also groundmass together with volcanic glass. Seconday minerals are quartz, zeolite and calcite. Geochemichal analysis results indicate a low TiO2 (0.8– 0.9 wt.%), medium to high Al2O3 (14–17 wt.%), high Fe2O3 (10–12 wt.%) and low Mg value (Mg#) (39–42). According to TAS and AFM diagram, the rocks is apparently to be basalt and tholeiitic island arc magma. While spidergram pattern of the trace elements shows relatively flat fo HREE and enriched pattern on LREE. Niobium element displays a depleted anomaly, indicated that the crust influences in parental magma, which is another characteristic of magmatic island arc. Based on regional tectonic, the volcanic rocks from Late Oligocene in the area has relationship with subduction processes between Indo-Australia plate and Eurasian plate.
Keywords: Pillow structure, tholeiitic, lava, subduction
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/6671
Journal of Applied Geology; Vol 1, No 1 (2009)
eng
Copyright (c) 2009 Dian Novia Sartika, I Wayan Warmada, Bhakti H. Harahap, Widiasmoro Soewondo
oai:jurnal.ugm.ac.id:article/6672
2015-07-12T03:13:06Z
jag:ART
nmb a2200000Iu 4500
"090701 2009 eng "
2502-2822
2086-5104
dc
Road to earthquake mitigation: Lesson learnt from the Yogyakarta earthquake 2006
Pramumijoyo, Subagyo
At early in the morning of May 27, 2006, people of Yogyakarta was stroke by earthquake and mostly heavily damaged building are in lowland or Yogyakarta depression where is occupied by the Young Merapi sediments. The magnitude of earthquake is Mw = 6.2 and USGS rapid moment tensor shows that this earthquake was due to strike-slip fault movement.
Seismic history of Yogyakarta area shows that Yogyakarta was stroke by several earthquakes with different epicenter location. At least two earthquakes stroke the area, that is in 1876 and 1943. The damages are similar to the damages of actual earthquake. Yogyakarta depression is mostly covered by Young Merapi sediments that consist of tuff, volcanic ash, breccias, agglomerate and lava with Quaternary in age. The thickness of this sediment is up to 100 m.
Our reactive work was to establish firstly zone of damage. For this purpose, we made aerial photograph along the most damaged area. In the same time one of our teams go to the field to measure the cracks, and the other teams to observe liquefaction, hydro geologic measurement, and observation on landslide induce by earthquake. Secondly, we must understand the soil properties and its thickness, because in seismic history it was a similar damage on the same area due to earthquakes however the earthquake epicenters were different. For this purpose we utilize the method of micro-tremors. We also made some drilling until 60 m each, measuring seismic velocity on bore hole, and magneto telluric measurement. We also have helped by Kyushu University in installing micro seismic net work. The research was followed by either undergraduate and graduate students. Fortunately our research was financed by AUN/Seed Net – JICA. Some of the results were published in a book entitled The Yogyakarta Earthquake of May 27, 2006. Another outcome is the Maps of Microzonation and Earthquake Hazard of Bantul Area that dedicated to Bantul people.
Based on aerial photograph observation and field observation on Bantul Regency, especially along the Opak River, and to Wonosari to the East, there was no surface ruptures, so there is no fault on surface. Interpretation of aftershock data was showing the difference cluster. There is still open problem in determining either epicenter or aftershock location. The damage building was interpreted as due to its geologic setting, non engineered building, and close to epicenter of earthquake. This heavily damaged building are located on the Young Merapi sediments at Bantul Regency and lake deposits at Gantiwarno and Bayat area where it can amplify the surface seismic wave. It implies that Peak Ground Acceleration according to Indonesian National Standard should be modified in Yogyakarta area.
Keywords: Earthquake, seismic, epicenter, micro-tremor, microzonation
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/6672
Journal of Applied Geology; Vol 1, No 2 (2009)
eng
Copyright (c) 2009 Subagyo Pramumijoyo
oai:jurnal.ugm.ac.id:article/6673
2015-09-02T00:15:24Z
jag:ART
nmb a2200000Iu 4500
"150712 2015 eng "
2502-2822
2086-5104
dc
Concentration of sheep manure bacteria in the immobilization of arsenic from groundwater using zero-valent
Wilopo, Wahyu
Sasaki, Keiko
Hirajim, Tsuyoshi
Permeable reactive barrier column tests were performed to investigate whether anaerobic bacteria in sheep manure could help remove As from groundwater. One column served as a control and was packed with zero-valent iron (ZVI), compost leaf, wood chips, glass beads, and gravel, after which it was sterilized. The other (‘inoculated column’) was packed with the same ingredients, with the addition of sheep manure as a source of anaerobic bacteria. Simulated As-contaminated groundwater was prepared based on groundwater samples from Sumbawa Island, Indonesia, but with the arsenic concentration adjusted to 50 mg/L. The inoculated column was found to remove As more effectively from the simulated groundwater than the sterilized one. A gradual decrease in sulfate concentration was observed in the inoculated column at the rate of 0.26 mmol of sulfate/L/day, suggesting that there was sulfate-reducing activity in the microbial population. In addition, the sulfur isotope ratio showed -4.3 (‰) and 0.2 (‰) in influent and effluent, respectively, indicating that sulfate-reducing bacteria (SRB) consumed δ32S preferentially. Using population size estimates from the most probable number (MPN) method, the population of SRB was found to increase with distance traveled in the column. Profiling the community composition of the bacteria in different fractions of the inoculated column using polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) on 16S rRNA sequences suggested that a majority of bacteria were various Clostridium species and one species of Proteobacteria, Geobacter metallireducens GS-15. Some of them may contribute to the removal of arsenic.
Keywords: Sheep manure, zero valence iron, arsenic, immobilization, sulfate-reducing bacteria
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/6673
Journal of Applied Geology; Vol 2, No 1 (2010)
eng
Copyright (c) 2015 Wahyu Wilopo, Keiko Sasaki, Tsuyoshi Hirajim
oai:jurnal.ugm.ac.id:article/6674
2020-12-29T07:45:47Z
jag:ART
nmb a2200000Iu 4500
"150712 2015 eng "
2502-2822
2086-5104
dc
Origin of the Late Paleozoic metamorphic rocks in East Johor, Peninsular Malaysia
Surjono, Sugeng Sapto
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
Leman, Shafeea
School of Environmental Science and Natural Resources, Universiti Kebangsaan Malaysia
Low grade metamorphic rocks including slate, phyllite, metasandstone with subordinate schist and quartzite are widely distributed in the East Johor, Peninsular Malaysia. Regionally, this rock unit is extended northward up to northern Terengganu area. The protolith of this rocks unit were deposited in shallow marine depositional environment that subsequently metamorphosed during Carboniferous time. The very thick argillaceous and arenaceous rocks more than 5000 metres were produced by fast rate accommodation spaces due to global sea level rise during Early to Late Carboniferous against with high fine-grained sediment supply. Tectonic setting, basin formation and sedimentation processes were controlled by rifting of Indochina-East Malaya continental block from Gondwanaland during Devonian to Late Carboniferous. This rifting formed basins within a passive margin tectonic setting along the western margin of Indochina-East Malaya continental block.
Keywords: Metamorphic rocks, shallow marine, Carboniferous, passive margin
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/6674
Journal of Applied Geology; Vol 2, No 2 (2010)
eng
Copyright (c) 2015 Sugeng Sapto Surjono, Shafeea Leman
oai:jurnal.ugm.ac.id:article/7159
2015-09-01T19:47:30Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Bio-geochemical simulation for solute transport in Piyungan landfill, Yogyakarta Special Province, Indonesia
Phonhalath, Keophousone
Karnawati, Dwikorita
Hendrayana, Heru
Prakasa Eka Putra, Doni
Jinno, Kenji
Piyungan Landfill is the largest in Bantul Regency. According to water quality sampling taken from a leachate pond, there are significant contaminant issues resulting from landfill leachate. The objectives of this research were achieved by applying a two-dimensional bacteria mediated reduction numerical model was applied. Method of characteristic was applied to solve the advection part of the solute transport equation. Three bacteria (X1, X2, and X3) groups were defined in the redox model. In the conceptual model, bacterial X1 utilizes oxygen under aerobic conditions and nitrate, NO-3 under aerobic conditions as electron acceptors. Consequently, under aerobic conditions bacteria X2, and X3 utilize MnO2, and Fe(OH)3 respectively as electron acceptors. In the redox model organic carbon which was defined as CH2O was considered as the electron donor for all bacteria mediated reduction reactions. The results of research are to improve the understanding of biogeochemical processes in aquifer.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7159
Journal of Applied Geology; Vol 3, No 1 (2011)
eng
Copyright (c) 2015 Keophousone Phonhalath, Dwikorita Karnawati, Heru Hendrayana, Doni Prakasa Eka Putra, Kenji Jinno
oai:jurnal.ugm.ac.id:article/7177
2015-09-01T19:53:22Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
The mineralogy of gold-copper skarn related porphyry at the Batu Hijau deposit, Sumbawa, Indonesia
Thwee Aye, May
Pramumijoyo, Subagyo
Idrus, Arifudin
Setijadji, Lucas Donny
Imai, Akira
Araki, Naoto
Arif, Johan
Clacic gold-copper bearing skarn in the Batu Hijau porphyry deposit is located in the western part of Sumbawa Island, Indonesia. Skarn mineralizations were found at the deep level of the deposit (-450m to -1050mL) by drilling program 2003. No evidence around Batu Hijau has limestone although most skarn are metasomatiz ed from carbonate-rich rock as limestone or marble. Most skarn-type metasomatic alteration and mineralization occurs at the contact of andesitic volcanic rock and intermediate tonalite porphyry intrusion and within intermediate tonalite in some. Although both endoskarn and exoskarn can be developed, it has no clear minerals to known the endoskarn. Exoskarn is more principle skarn zone. The formation of skarn occurred two min stages: (1) prograde and (2) retrograde. The prograde stage is temporally and spatially divided into two sub-stages as early prograde (sub-stage I) and prograde metasomatic (sub-stage II). Sub-stage I begin immediately after the intrusion of the tonalite stock into the calcium rich volcanic rocks. Then, sub-stage II originated with segregation and evolution of a fluid phase in the pluton and its invasion into fractures and micro-fractures of host rocks developed during sub-stage I. The introduction of considerable amount of Fe, Si and Mg led to the large amounts of medium- to coarse-grained anhydrous calc-silicates. From the texture and mineralogy, the retrograde metasomatic stage can be divided into two sub-stages: (a) early retrograde and (sub-stage III) and (b) late retrograde (sub-stage IV). During sub-stage III, the previously formed skarn zones were affected by intense multiple hydro-fracturing phases in the gold-copper bearing stocks. Therefore, the considerable amounts of hydrous calc-silicates (epidote), sulfides (pyrite, chalcopyrite, sphalerite), oxides (magnetite, hematite) and carbonates (calcite) replaced the anhydrous calc-silicates. Sub-stage IV was coexisting with the intrusion of relatively low temperature, more highly oxidizing fluids into skarn system, bringing about partial alteration of the early-formed calc-silicates and developing a series of very fine-grained aggregrates of chlorite, clay, hematite and calcite.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7177
Journal of Applied Geology; Vol 3, No 1 (2011)
eng
Copyright (c) 2015 May Thwee Aye, Subagyo Pramumijoyo, Arifudin Idrus, Lucas Donny Setijadji, Akira Imai, Naoto Araki, Johan Arif
oai:jurnal.ugm.ac.id:article/7178
2015-09-01T19:59:16Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Study on mineralogy and chemistry of the saprolitic nickel ores from Soroako, Sulawesi, Indonesia: Implication for the lateritic ore processing
Sufriadin, Sufriadin
Idrus, Arifudin
Pramumijoyo, Subagyo
Warmada, I Wayan
Imai, Akira
An investigation of mineralogy and chemistry of saprolitic nickel ores developed on ultramafic rock with different serpentinization degree from Soroako, Sulawesi has been conducted using X ray diffraction, thermal analysis, FTIR, and ICP-AES. The implication for the processing of these ores under acidic media was also studied. Weathering of unserpentinized peridotite in the Soroako west block produces saprolitic ore containing minerals such as relict olivine, goethite, quartz, talc with minor serpentine and smectite; whereas the weathered materials overlaying serpentinized peridotite in the Petea area are mainly composed of residual serpentine with lesser chlorite, maghemite, and remnant pyroxene and amphibole. Chemical analysis determined by ICP-AES demonstrates that west ore is higher in Si, Mg, and Ni, as compared to that Petea ore. Conversely, Fe and Al concentrations are higher in Petea ore than in west block ore. SEM-EDX examination reveals that olivine, talc, serpentine and goethite are the Ni-bearing phases occurring in west block ore; while serpentine is the principal host for Ni in the Petea ore. Chemical leaching under sulfuric acid reveals that olivine has highest dissolution rate in the west ore followed by serpentine; while talc, pyroxene, and iron oxides have slow dissolution rates. In contrast, serpentine in Petea ore is easily dissolved and is followed by chlorite; whereas amphibole, pyroxene, and maghemite are difficult to leach. Quartz is present in both ores and it seems to be undissolved during the chemical leaching. It is shown that Ni recovery from Petea saprolitic ore is higher than that of West Block ore.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7178
Journal of Applied Geology; Vol 3, No 1 (2011)
eng
Copyright (c) 2015 Sufriadin Sufriadin, Arifudin Idrus, Subagyo Pramumijoyo, I Wayan Warmada, Akira Imai
oai:jurnal.ugm.ac.id:article/7179
2015-09-01T20:04:11Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Mineral paragenesis and fluid inclusions of the Bincanai epithermal silver-base metal vein at Baturappe area, South Sulawesi, Indonesia
Nur, Irzal
Idrus, Arifudin
Pramumijoyo, Subagyo
Harijoko, Agung
Imai, Akira
The Baturappe prospect located at southern part of Sulawesi island, Indonesia, is a hydrothermal mineralization district which is characterized by occurrence of epithermal silver-base metal deposits. The mineralization is hosted in basaltic-andesitic volcanic rocks of the late Middle-Miocene Baturappe Volcanics. More than 20 units of quartz – base metal veins are distributed in the area, and one of the most significant is the Bincanai vein. This study is aimed to characterize the mineral paragenesis and to elucidate the physicochemical conditions of the formation of the deposit on the basis of mineral assemblage and fluid inclusion mictrothermometry. Sulphide assemblages in the vein indicate an intermediate sulfidation state epithermal; beside galena and sphalerite as the early stage minerals, chalcopyrite, tennantite, and tetrahedrite are also identified as the later stage. Microthermometric study of fluid inclusions in quartz indicates formation temperature of the vein ranges from about 230 to 280°C Histogram of homogenization temperature suggests that there are two generations of hydrothermal fluid responsible for the ore mineralization in the vein; the higher temperature range represents formation temperature of the base metal (galena, sphalerite), while the lower temperature range is correlate with the precipitation of the rest relatively lower temperature sulphides (chalcopyrite, pyrite, tetrahedrite, tennantite, polybasite, and Bi-Ag-Cu-Fe-bearing sulfide). The sequence is also consistent with the mineral paragenetic. The mean of salinity (2.0–2.5 wt.% NaCl eq.) indicates that fluid responsible for the mineralization in the Bincanai vein is relatively low-salinity fluid.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7179
Journal of Applied Geology; Vol 3, No 1 (2011)
eng
Copyright (c) 2015 Irzal Nur, Arifudin Idrus, Subagyo Pramumijoyo, Agung Harijoko, Akira Imai
oai:jurnal.ugm.ac.id:article/7180
2015-09-01T20:07:52Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Petrogenetic interpretation of granitoid rocks using multicationic parameters in the Sanggau Area, Kalimantan Island, Indonesia
Linn Zaw, Kyaw
Setijadji, Lucas Donny
Warmada, I Wayan
Watanabe, Koichiro
Granitoid rock compositions from a range of tectonic environments are plotted on a multicationic diagram, based on major and trace element geochemistry and K-Ar dating. This shows that there is a different tectonic nature, rock affinity and suites. The basement granitoid rocks are ranging from diorite to granite composition. They appear to the products of crystallization differentiation of a calc-alkaline magma of island affinity and range to metaluminous granites, granodiorite and tonalite. The tectonic setting has two kinds which are subduction and post-subduction. The geochemical interpretation, origin and melting of mechanism and tectonic setting shows the types of granitoid are M and I-M type. The basement of granite and granodiorite are a segment of island arc that were happened the Sintang Intrusion as post subduction or syn-collision tectonic setting.
Keywords: Petrogenetic, tectonic, affinity, Sintang Intrusion, Kalimantan
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7180
Journal of Applied Geology; Vol 3, No 1 (2011)
eng
Copyright (c) 2015 Kyaw Linn Zaw, Lucas Donny Setijadji, I Wayan Warmada, Koichiro Watanabe
oai:jurnal.ugm.ac.id:article/7181
2015-09-01T20:11:15Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Geology and characteristics of Pb-Zn-Cu-Ag skarn deposit at Ruwai, Lamandau Regency, Central Kalimantan
Idrus, Arifudin
Setijadji, Lucas Donny
Tamba, Fenny
Anggara, Ferian
This study is dealing with geology and characteristics of mineralogy, geochemistry and physicochemical conditions of hydrothermal fluid responsible for the formation of skarn Pb-Zn-Cu-Ag deposit at Ruwai, Lamandau Regency, Central Kalimantan. The formation of Ruwai skarn is genetically associated with calcareous rocks consisting of limestone and siltstone (derived from marl?) and controlled by NNE-SSW-trending strike slip faults and localized along N 70° E-trending thrust fault, which also acts as contact zone between sedimentary and volcanic rocks in the area. Ruwai skarn is mineralogically characterized by prograde alteration (garnet and clino-pyroxene) and retrograde alteration (epidote, chlorite, calcite and sericite). Ore mineralization is characterized by sphalerite, galena, chalcopyrite and Ag-sulphides (particularly acanthite and argentite), which formed at early retrograde stage. Geochemically, SiO2 is enriched and CaO is depleted in limestone, consistent with silicic alteration (quartz and calc-silicate) and decarbonatization of the wallrock. The measured reserves of the deposit are 2,297,185 tonnes at average grades of 14.98 % Zn, 6.44 % Pb, 2.49 % Cu and 370.87 g/t Ag. Ruwai skarn orebody originated at moderate temperature of 250-266 °C and low salinity of 0.3-0.5 wt.% NaCl eq. The late retrograde stage formed at low temperature of 190-220 °C and low salinity of ~0.35 wt.% NaCl eq., which was influenced by meteoric water incursion at the late stage of the Ruwai Pb-Zn-Cu-Ag skarn formation.
Keywords: Geology, skarn, mineralogy, geochemistry, Ruwai, Central Kalimantan
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7181
Journal of Applied Geology; Vol 3, No 1 (2011)
eng
Copyright (c) 2015 Arifudin Idrus, Lucas Donny Setijadji, Fenny Tamba, Ferian Anggara
oai:jurnal.ugm.ac.id:article/7182
2018-01-15T03:32:04Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Characteristics and genesis of montmorilonitic claystone from Bandung area, Wonosegoro, Boyolali, Central Java, Indonesia
Yuliyanti, Anita
Department of Geological Engineering, Gadjah Mada University
Warmada, I Wayan
Department of Geological Engineering, Gadjah Mada University
Titisari, Anastasia Dewi
Department of Geological Engineering, Gadjah Mada University
The Bandung bentonite deposit is located in Wonosegoro District, Boyolali Regence, Central Java. Characteristics of bentonite in this area are very important due to increase demand on bentonite in the industry. Several methods are used to characterize the bentonite in this area, such as PLM (polarizing light microscope), X-Ray Diffraction and Scanning Electron Microscope combined with EDX measurements. The montmorilonitic claystone belongs to Kerek Formation from Banyuurip Member. This deposit consists of mainly montmorilonitic claystone interbedded with tuffaceous sandstone. Petrographical analysis shows that montmorilonitic claystone consists of mostly clay minerals with small amount of calcite, volcanic glass, feldspar, quartz, and opaque minerals. The clay minerals are likely as alteration product of volcanic glass. The oriented XRD analyses show that the clay samples consist of Ca-montmorilonite, illite, and kaolinite. Physico-chemical analyses of montmorilonitic claystone display that the initial CEC (cation exchange capacity) is 20 mgrek.Na2O/200gr (54 mg.Na2O/100gr) and low swelling ability for about 2 times of its initial volume. Based on its mineralogical association, textures, and stratigraphic position, the montmorilonite is formed from devitivication of volcanic glass in a diagenetic environment with over 2 km thicks of overburden. Keywords: Bentonite, montmorillonitic claystone, devitrivication, diagenesis, montmorillonite
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7182
Journal of Applied Geology; Vol 3, No 1 (2011)
eng
Copyright (c) 2015 Anita Yuliyanti, I Wayan Warmada, Anastasia Dewi Titisari
oai:jurnal.ugm.ac.id:article/7183
2015-09-01T20:15:11Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Adsorption of heavy metal by natural clayey soil
Budianta, Wawan
This study focused on the capability of Clayey soil to retain and release heavy metals. Batch experiment for sample of clayey soil was conducted with several concentrated solutions of heavy metals. The results show that the clayey soil sample may have a relatively high heavy metal retention capacity. This is particularly positive in the context of municipal waste disposal (landfills) in Indonesia
Keywords: Adsorption, heavy metal, clayey soil, batch experiment
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7183
Journal of Applied Geology; Vol 3, No 1 (2011)
eng
Copyright (c) 2015 Wawan Budianta
oai:jurnal.ugm.ac.id:article/7184
2015-09-01T20:20:30Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Lateritization process of peridotites in Siruka, Choiseul, Solomon Islands
V. Sagapoa, Christopher
Imai, Akira
Ogata, Takeyuki
Yonezu, Kotaro
Watanabe, Koichiro
The lateritic weathering crusts exposed in Siruka, Choiseul Islands, Solomon Islands, were developed on the expense of serpentinized peridotite underlain by Siruka schists and Voza lavas with a subhorizontal contact. The lateritic profiles consist of three generalized zones: bedrock, saprolitic zone (weathered and decomposed zone) and the limonitic zones. The profiles demonstrate variations in depths and continuity but illustrate mineralogy and geochemical affinity down profile and are analogous to saprolitic nickel laterite deposits. Silica and magnesia in the bed rock and the saprolitic zones have been removed and only the residual elements (iron, chromium, aluminium, manganese, cobalt and nickel) remain in the limonitic zone. These elements are relatively concentrated as a result of the removal of the soluble elements. Nickel is associated with silica and magnesia, as lizardite ormixed gels (garnierite nickel ore) at the weathering fronts. On the other hand, nickel, with generally low concentrations (
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7184
Journal of Applied Geology; Vol 3, No 2 (2011)
eng
Copyright (c) 2015 Christopher V. Sagapoa, Akira Imai, Takeyuki Ogata, Kotaro Yonezu, Koichiro Watanabe
oai:jurnal.ugm.ac.id:article/7185
2015-09-01T20:22:32Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Ground movement prediction due to block caving mining geometry using GIS
Setianto, Agung
Widijanto, Eman
Large scale block cave mining has been operated for over 30 years in the Erstberg Mining District in the province of Papua, Indonesia. The ore body is divided into four vertically stacked ore bodies: Gunung Bijih Timur (GBT), Intermediate Ore Zone (IOZ), Deep Ore Zone (DOZ), and Deep Mill Level Zone (DMLZ). The GBT and IOZ mines were closed on 1993 and 2003, DOZ mine is in its peak production performance 80 ktpd, and DMLZ mine is still in the development stage to prepare mine infrastructures. This situation generates gradual downward settling of the surface or subsidence. Significant deformation changes at the surface by block caving subsidence could damage the mine’s infrastructures in surface and underground and also affect geological structures overlying the mining areas which may result in surface impacts on the natural geomorphology and land use.
In this paper, integrated system based on Geographic Information System (GIS) platform applied to predict ground movements due to underground mining. Deep Ore Zone (DOZ) block cave mine is studied for subsidence prediction. The mining extraction thickness model is obtained from height of draw (HOD) observed data. Subsidence Engineering Handbook (SEH) of empirical model and measured data from mining fields is used for subsidence calculation parameters. The calculations were performed in GIS. The maximum vertical displacement has been predicted about 12m by means of full caving mining method.
Keywords: Ground movements, block caving, GIS, underground mining, and subsidence
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7185
Journal of Applied Geology; Vol 3, No 2 (2011)
eng
Copyright (c) 2015 Agung Setianto, Eman Widijanto
oai:jurnal.ugm.ac.id:article/7186
2015-09-01T20:25:39Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
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Geo-disaster Laharic Flow along Putih River, Central Jawa, Indonesia
Surjono, Sugeng Sapto
Yufianto, Ahmad
In 2011, laharic flow transporting volcanic materials had significantly occurred along Putih River, causing severe damage in Jumoyo area, Magelang, Central Java, Indonesia. The disaster happened frequently until April 2011. The approximately 150 million cubic meter of volcanic materials expelled from 2010 Merapi eruption has been assumed as main cause of recent laharic flow. Although pyroclastic deposit mostly flew to south and southeastern direction through Woro, Gendol, and Opak Rivers, laharic flow apparently flew to the west – westward directions through Putih and Pabelan Rivers. This study will explain the mechanism of such disaster along Putih River from sedimentological point of view.
Transport mechanism of laharic flow along river is strongly controlled by the slope and type of fluids. In the upper stream area, debris flow commonly occurs as gravity flow in the steep slope. To the downstream area, where more river and surface water infiltrates the volcanic material transportation, laharic flow mechanism transforms to hyperconcentrated flow. In the gently slope area, laharic flow decreases in concentration but increase in amount because of the accumulation influx from several river flows. Hyperconcentrated flow in Putih River is mostly generated by accumulation of river flow in the tributary area. In such area, loose volcanic materials are eroded easily by surface water. Rill and gully erosion bring volcanic material into main channel of Putih River, followed by intensive vertical erosion along upper stream that will produce bigger accumulation of volcanic material within laharic flow in the downstream area. Several sabo dams along the Putih River were damaged during early period of laharic flow due to this transportation mechanism.
At the downstream of in Gempol Village, Jumoyo Area, the main channel of Putih River is shifting northwestward significantly due to Gendol Hill. On the other hand, river body in this settlement area is narrower compared to the upper stream area just before turning point. Both condition cause laharic flow to spill out from the channel and form an unconfined sheet debris flow with a 500 m width and around 2-4 m thick sediments. Although energy of transport is reduced significantly, but this flow is still able to transport abundant volcanic material ranging from silt to boulder. Traditional market and hundreds of houses were buried and the main road from Yogyakarta to Magelang city has been disconnected for several times due to this disaster.
Keywords: Putih River, Laharic flow, Jumoyo
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7186
Journal of Applied Geology; Vol 3, No 2 (2011)
eng
Copyright (c) 2015 Sugeng Sapto Surjono, Ahmad Yufianto
oai:jurnal.ugm.ac.id:article/7187
2015-09-01T20:27:31Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
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The potential impact of ash Merapi Volcano eruption 2010 in Yogyakarta, Indonesia, for the environment and human health
Budianta, Wawan
The eruptions of Merapi Volcano began in late October 2010 and continued into early November 2010. Among parts of materials ejected by Merapi Volcano, volcanic ash is considered to be a respiratory health hazard because of several potentially toxic components: respirable crystalline silica and metals. The objective of this study is to review the grain size of volcanic ash and to analyze the composition of volcanic ash which is suspected to carry a variety of potentially toxic elements. The result of this study shows that very fine grain size of volcanic ash were detected which has a potential to become respiratory problem trigger. The heavy metals were also detected in ash samples. On the other hand, total sulfur content was also considered high and the source of this sulfur was sulfur dioxide during eruption.
Keywords: Merapi volcano, eruption, volcanic ash, health hazard, toxic elements.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7187
Journal of Applied Geology; Vol 3, No 2 (2011)
eng
Copyright (c) 2015 Wawan Budianta
oai:jurnal.ugm.ac.id:article/7188
2015-09-01T20:30:07Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Evolution of groundwater chemistry on shallow aquifer of Yogyakarta City urban area
Eka Putra, Doni Prakasa
Since 1980s, accelerated by urbanization, Yogyakarta City was shifting to many directions defined by main road networks and service centres. Urbanization has transformed rural dwellings to become urban settlements and generated urban agglomeration area. Until now, new business centres, education centres and tourism centres are growing hand in hand with new settlements (formal or informal) without proper provision of water supply and sanitation system. This condition increase the possibility of groundwater contamination from urban wastewater and a change of major chemistry of groundwater as shallow unconfined aquifer is lying under Yogyakarta City. To prove the evolution of groundwater chemistry, old data taken on 1980s were comparing with the recent groundwater chemistry data. The evaluation shows that nitrate content of groundwater in 1980s was a minor anion, but nowadays become a major anion, especially in the shallow groundwater in the centre of Yogyakarta City. This evidence shows that there is an evolution of groundwater chemistry in shallow groundwater below Yogyakarta City due to contamination from un-proper on-site sanitation system.
Keywords: Urbanization, Yogyakarta city, rural dwellings, settlements, agglomeration, contamination, groundwater
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7188
Journal of Applied Geology; Vol 3, No 2 (2011)
eng
Copyright (c) 2015 Doni Prakasa Eka Putra
oai:jurnal.ugm.ac.id:article/7189
2015-09-01T20:32:25Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Removal of mercury (Hg) from contaminated water at traditional gold mining area in Central Kalimantan
Wilopo, Wahyu
Rahman, Denizar
Eka Putra, Doni Prakasa
Warmada, I Wayan
There are many traditional gold mining and processing in Murung Raya Regency, Central Kalimantan. The processing of gold mostly uses mercury (Hg) and produces a lot of waste water. It just throws to the river without any treatment. Therefore the concentration of mercury (Hg) in the river water is over than the standard of drinking water and reach up to 0.346 mg dm-3. This situation is very dangerous because almost of the people in the downstream area depend on the river water for their daily purposes. To solve this problem, tuff from local material was used to remove mercury using batch experiment. The result showed that tuff has capability to remove mercury in the significant amount. The main mechanism of mercury removal by tuff is cation exchange processes due to high surface area of tuff. The result of this study can be used as an alternative for waste water treatment in mining area.
Keywords: Traditional mining, mercury removal, tuff
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7189
Journal of Applied Geology; Vol 3, No 2 (2011)
eng
Copyright (c) 2015 Wahyu Wilopo, Denizar Rahman, Doni Prakasa Eka Putra, I Wayan Warmada
oai:jurnal.ugm.ac.id:article/7191
2018-01-19T00:58:50Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
ORE MINERALOGY AND MINERAL CHEMISTRY OF PYRITE, GALENA, AND SPHALERITE AT SORIPESA PROSPECT AREA, SUMBAWA ISLAND, INDONESIA
Kant, Win
Department of Geology, Banmaw University, Myanmar
Warmada, I Wayan
Department of Geological Engineering, Gadjah Mada University
Idrus, Arifudin
Department of Geological Engineering, Gadjah Mada University
Setijadji, Lucas Donny
Department of Geological Engineering, Gadjah Mada University
Watanabe, Koichiro
Department of Earth Resource Engineering, Kyushu University, Japan
The Soripesa prospect area is located at Maria village, Wawo district, Bima region in the East Sumbawa Island, Indonesia. Lithology is dominantly composed of a lithic-crystal tuff of andesitic and dacitic composition and bedded limestone. The polymetallic epithermal quartz veins are hosted by andesitic volcaniclastic rocks. Within these veins, multiphases, colloform-crustiform, bedding to massive textures with pyrite, sphalerite, galena, chalcopyrite, chalcocite, azurite, and malachite are observed. Selected samples were analyzed by using ore microscopy and SEM-EDX. Ore minerals show replacement, ex-solution, colloform, and zonal textures. The paragenesis diagram was made from a careful study of polished sections and thin sections. Textures of ore minerals such as banded, exsolution, replacement, and zone, have been interpreted to correspond to the order of deposition. In pyrite, the average content of Co (0.45 wt.%) is higher than Ni content (0.14 wt.%) and it means that their origin may be hydrothermal origin. Average content ratio, Co:Ni is 2.81. Galena shows a low Ag content of 0.07 %in average. But they show a high Au content of 1.48 %in average. Sphalerite shows a low Fe content of 1.04 %in average and occasionally chalcopyrite inclusion/disease also occurred. Ga and Ge contents are also high in sphalerite. Co>Ni in pyrite, low content of Ag in Galena, low content of Fe and mole % FeS in sphalerite, high content of Ga and Ge, and log (Ga/Ge) in sphalerite, show that pyrite, galena, and sphalerite from Soripesa prospect area were formed under low temperature condition of hydrothermal fluid. Keywords: Ore textures, paragenesis, deposition, hydrothermal fluid, low temperature
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7191
Journal of Applied Geology; Vol 4, No 1 (2012)
eng
Copyright (c) 2015 Win Kant, I Wayan Warmada, Arifudin Idrus, Lucas Donny Setijadji, Koichiro Watanabe
oai:jurnal.ugm.ac.id:article/7192
2018-01-19T00:55:47Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
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dc
COASTAL AQUIFER GROUNDWATER MODELING IN THE SOUTHERN PART OF YOGYAKARTA AREA, INDONESIA
Rata, Doung
Rural Engineering Department, Institute of Technology of Cambodia
Eka Putra, Doni Prakasa
Department of Geological Engineering, Gadjah Mada University, Yogyakarta
Hendrayana, Heru
Department of Geological Engineering, Gadjah Mada University, Yogyakarta
Parangtritis beach, located in a coastal aquifer at the southern part of Yogyakarta Province, Indonesia is bounded by the Indian Ocean at the South, Opak River at the West, and Tertiary Limestone Rock to the East. Local land-use is predominantly agriculture, rice fields and settlements and the population is estimated to be 9,386 persons as per the 2012 census. The total surface area is estimated at 9.46 km2. The aims of this research were to understand the system of groundwater and to assess and predict saltwater intrusion by conducting a numerical groundwater model. Hydrological and hydrogeological data were collected directly from the field and from previous work for input into the model. The model simulates an unconfined aquifer system where the aquifer thickness varies from 30-40 meters. The material of the aquifer consists of sand varying from fine to coarse grain size and fine gravel with hydraulic conductivity values of 8.974 × 10−4, 1.794 × 10−3, and 1.337 × 10−3 m/s at the northern, central, and southern part of the research area, respectively. The maximum length of the saltwater interface was estimated at about 205.1 m laterally and 40 m vertically relative to the location of the groundwater table around 1m above sea level. Direction of groundwater flow is from north to south. Groundwater table elevation equals 5 m at the north and 0 m at the south with a hydraulic gradient estimated at about 2.45 × 10−3. As a result of a steady-state simulation as well as two cases of prediction for five and ten years in the future, it is determined that that the salinity of the surrounding environment is not potentially adverse to the groundwater quality in the study area. This is in part due to low population in this area and abundant groundwater resources, as well as the results of the groundwater model. Keywords: Coastal aquifer, numerical groundwater model, conceptual model, observed heads
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7192
Journal of Applied Geology; Vol 4, No 1 (2012)
eng
Copyright (c) 2015 Doung Rata, Doni Prakasa Eka Putra, Heru Hendrayana
oai:jurnal.ugm.ac.id:article/7193
2018-01-19T00:59:46Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Removal Of Copper From Water Using Columns Experiment Of Lignite, Shale, And Ironsand
Boreborey, Ty
Department of Geological Engineering, GadjahMada University, Yogyakarta
Wilopo, Wahyu
Department of Geological Engineering, GadjahMada University, Yogyakarta
Eka Putra, Doni Prakasa
Department of Geological Engineering, GadjahMada University, Yogyakarta
Experimental studies using column testing of lignite, shale, and ironsand in copper solution were carried out to determine the adsorption capacity of lignite, shale, and ironsand in remediation of water contaminated with copper. Lignite, shale, and ironsand were analyzed using XRD, SEM/EDX, and XRF. The treatment process by column adsorption was carried out over a period of 24 hours at a stable velocity of 0.005ml/s. After treatment, the remaining copper in the solution was recorded, thus allowing the adsorption capacity of lignite, shale, and ironsand to be calculated. The results revealed that when the solution was treated by lignite and shale there was a good degree of copper removal, while the ironsand had very poor degree of copper removal. The best material for copper removal was lignite with 25-mesh grain size. Pyrite, graphite, calcite, and illite were found in lignite and smectite, calcite, pyrite, hematite, and illite were found in shale. These materials were also shown to contain an abundance of high-valence elements in Al2O3, SiO2, and Fe3O4 which contributes to additional adsorption capacity. CAC values for lignite and shale reached nearly to 100%, suggesting that lignite and shale have a high adsorption capacity. In contrast, ironsand, which has mostly sand minerals with little clay and organic content, caused the pollutant to move rapidly to the water table, reducing the adsorption potential. CAC values treated by ironsand were shown to be negative which showed an increasing of Cu2+ in natural ironsand into solution. Keywords: Copper, ironsand, shale, lignite, column experiment
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7193
Journal of Applied Geology; Vol 4, No 1 (2012)
eng
Copyright (c) 2015 Ty Boreborey, Wahyu Wilopo, Doni Prakasa Eka Putra
oai:jurnal.ugm.ac.id:article/7194
2018-01-19T01:01:04Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
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Kinetic And Equilibrium Studies On The Adsorption Of Pb2+ And Zn2+ From Aqueous Solution Using Coco-Peat By Batch Experiment
Waskita, Kukuh Jalu
Environmental Engineering, Graduate Program, University of the Philippines, Diliman, Quezon City, Philippines
C. Resurreccion, Augustus
Institute of Civil Engineering, University of the Philippines, Diliman, Quezon City, Philippines
Budianta, Wawan
Department of Geological Engineering, Faculty of Engineering, GadjahMada University
The presence of heavy metals in surface water, which is common in mining area pose harmful effect to human health and the environment. Recently, cocopeat has been studied as an effective sorbent material for removing heavy metals from wastewater. In this study, kinetic was done by analyzing the distribution of the heavy metal in sorbent material and liquid phase after mixing 50 mg/L solution of lead (Pb2+) and zinc (Zn2+)in single solute system with 0.1 g of coco-peat, that were consequently shaken at 5, 10, 15, 30, 60, 120, 180 and 360 minutes. To determine the equilibrium adsorption isotherm for each heavy metal, the solutions of 10, 20, 30,40 and 50 mg/L of Pb2+ and Zn2+ were prepared separately. Two different pH levels (natural pH, and pH 4) were setto describe the sorption behavior of Pb2+ and Zn2+ of each heavy metal.Using data from batch experiments, appropriate kinetic (time dependency) and equilibrium (isotherm) models were fitted on the sorbent material and liquid phase concentrations to determine adsorption parameters. Pseudo second-order kinetic model fitted well to the kinetic data due to chemisorption that happened during experiments. In other hand, Langmuir model fitted well to the equilibrium, this indicates that the sorption of lead and zinc on coco peat is monolayer and that the adsorbent’s surface is homogenous. The increase of heavy metals adsorption following the increase of pH might be due to negative charge of coco peat surface. Pb2+ adsorbed more than Zn2+ because ion with high hydration enthalpy will have smaller amount of ion adsorbed. The hydration enthalpies for Pb2+ and Zn2+ are 23 kJ/kg and 113 kJ/kg, receptively. Considering all the factors that we have discussed, cocopeat has high efficiency to remove the heavy metals from wastewater. Keywords: Coco-peat, adsorption, batch experiment, kinetic, equilibrium.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7194
Journal of Applied Geology; Vol 4, No 1 (2012)
eng
Copyright (c) 2015 Kukuh Jalu Waskita, Augustus C. Resurreccion, Wawan Budianta
oai:jurnal.ugm.ac.id:article/7195
2018-01-19T01:02:15Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Removal Of Lead (Pb2+) From Aqueous Solutions By Natural Bentonite
Wilopo, Wahyu
Department of Geological Engineering, Gadjah Mada University
Eka Putra, Doni Prakasa
Department of Geological Engineering, Gadjah Mada University
Warmada, I Wayan
Department of Geological Engineering, Gadjah Mada University
Hirajima, Tsuyoshi
Earth Resources Engineering Department, Kyushu University, Japan
The aim of the present work is to investigate the ability of natural bentonite (untreated) from Pacitan, East Java to remove lead ions from aqueous solution. The bentonite has specific surface area and cation exchange capacity of 27.52 m2 g−1 and 65.20 meq/100 gr of bentonite, respectively. Towards this aim, batch adsorption experiments were carried out and the effect of various parameters on this removal process has been investigated. The effects of pH, grain size of bentonite, adsorption time and lead ion concentration on the adsorption process were examined. The optimum pH for adsorption was found to be 9, with the finer grain size of bentonite is more effective. In adsorption studies, residual lead ions concentration reached equilibrium in a duration of 24 hours. Adsorption of lead on bentonite appeared to follow Freundlich isotherm. Our results demonstrate that the adsorption process was mostly dominated by ion exchange process. Keywords: Removal, lead, aqueous solution, natural bentonite, adsorption.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7195
Journal of Applied Geology; Vol 4, No 1 (2012)
eng
Copyright (c) 2015 Wahyu Wilopo, Doni Prakasa Eka Putra, I Wayan Warmada, Tsuyoshi Hirajima
oai:jurnal.ugm.ac.id:article/7196
2018-01-19T01:02:59Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Regional Depositional Model Of South Makassar Basin Depocenter, Makassar Strait, Based On Seismic Facies
Hidayat, Rahmadi
Department of Geological Engineering, GadjahMada University
Husein, Salahuddin
Department of Geological Engineering, GadjahMada University
Surjono, Sugeng Sapto
Department of Geological Engineering, GadjahMada University
South Makassar Basin Depocenter (SMBD) is located in Southern Makassar Strait which has petroleum potential by the presence of oil and gas indications within the area based on Airborne Laser Fluorescence survey. However, detail studies within this area are not developed well. One of the studies which can be utilized for further discoveries of oil and gas field in SMBD is a study of depositional model using seismic facies method to maximize limited seismic and well data. Interpretation of depositional model in Eocene (syn-rift phase) was varied from alluvial plain and alluvial fan complex, continued gradually to platform. In Oligocene time (post-rift phase), massive transgression caused a major deepening in entire SMBD where the depositional environment changed to basinal plain. In early Miocene – recent interval (syn-orogenic phase), SMBD was relatively in stable condition at basinal plain environment. Lower Tanjung Sequence will be the most prolific petroleum play in SMBD due to its adequate source rock, reservoir rock and seal rock as well. Keywords: South Makassar basin, depositional model, seismic facies
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7196
Journal of Applied Geology; Vol 4, No 1 (2012)
eng
Copyright (c) 2015 Rahmadi Hidayat, Salahuddin Husein, Sugeng Sapto Surjono
oai:jurnal.ugm.ac.id:article/7197
2018-03-02T01:56:48Z
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nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
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Batch Studies On Arsenic Adsorption Onto Lignite, Bentonite, Shale And Iron Sand: Effects Of Ph, Time, Particle Size And Sulfate Concentration
Kyu Mar, Kyu
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Karnawati, Dwikorita
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Eka Putra, Doni Prakasa
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Sarto, Sarto
Chemical Engineering Department, Faculty of Engineering, Gadjah Mada University
Igarashi, Toshifumi
Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University
Tabelin, Carlito Baltazar
Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University
Arsenic (As) is a toxic element found in both natural and anthropogenic sources. High concentration of this element was recently uncovered in the groundwater of Sumbawa Island, Indonesia. To mitigate this problem, As adsorption potential of natural geological materials like lignite, bentonite, shale, and iron sand obtained in Indonesia were evaluated by batch experiments. Arsenic adsorption onto these materials was investigated as a function of solution pH, particle sizes of adsorbents and coexisting sulfate concentration. In addition, batch leaching experiments were performed to elucidate the stability of geogenic As present in all adsorbents at different pHs. The results showed that among these natural materials tested, lignite was the most effective adsorbent of As(V) followed by bentonite, shale and then iron sand, and that the amounts of As(III) adsorbed onto all adsorbents were lower than those of As(V).This indicates that As(III) is more mobile in comparison to As(V). The adsorption isotherms of As(III) and As(V) conformed to nonlinear types, either Langmuir or Freundlich. It was found that adsorption of As onto these natural adsorbents was pH-dependent. This could be attributed to the changes in the surface charges of the adsorbents with pH. With respect to the adsorbent particle size, the amount adsorbed somewhat increased with decreasing particle size, which could be explained by the larger surface area of the smaller particles. Acidic (pH < 6) and alkaline (pH >10) conditions destabilized the geogenic As content of the adsorbents, indicating that the effectiveness of these natural materials as adsorbents is greatly limited by the pH of the contaminated system. Keywords: Adsorption, arsenic, natural geological materials, particle size, pH
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7197
Journal of Applied Geology; Vol 4, No 2 (2012)
eng
Copyright (c) 2015 Kyu Kyu Mar, Dwikorita Karnawati, Doni Prakasa Eka Putra, Sarto Sarto, Toshifumi Igarashi, Carlito Baltazar Tabelin
oai:jurnal.ugm.ac.id:article/7198
2018-03-02T01:58:37Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Copper Mobility Assessment Using Speciation Schemes: Case Study–Mantrijeron District, Yogyakarta, Indonesia
Xaixongdeth, Phetnakhone
Department of Geological Engineering, Gadjah Mada University
Hendrayana, Heru
Department of Geological Engineering, Gadjah Mada University
Eka Putra, Doni Prakasa
Department of Geological Engineering, Gadjah Mada University
Karnawati, Dwikorita
Department of Geological Engineering, Gadjah Mada University
Sato, Tsutomu
Laboratory of Environmental Geology, Faculty of Engineering, Hokkaido University
factors such physical and chemical properties, especially mineralogical composition of such environment. This study focused on the mineralogical of two soils types (fine sandy loam and loamy fine sand) to retain/mobile Cu. Two non contaminated soils from Yogyakarta urban area, Indonesia, were artificially contaminated with Cu solution. Subsequently, soils artificially contaminated were extracted from various geochemical phases of soil by sequential extraction procedure. The results show that both of soils types can retain Cu well with maximum is 5.8 mg/g of loamy fine sand and 3.9mg/g of fine sandy loam. Additionally, the iron amorphous phase content in clay fraction is influence Cu retains in these soils. This is advantage in environment of Yogyakarta urban area, Indonesia, where this area underlain by loamy sand soil. Keywords: Copper, mobility, iron, sequential extraction.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7198
Journal of Applied Geology; Vol 4, No 2 (2012)
eng
Copyright (c) 2015 Phetnakhone Xaixongdeth, Heru Hendrayana, Doni Prakasa Eka Putra, Dwikorita Karnawati, Tsutomu Sato
oai:jurnal.ugm.ac.id:article/7199
2018-03-02T02:00:50Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Fluid Inclusion Study Of The Polymetallic Epithermal Quartz Veins At Soripesa Prospect Area, Sumbawa Island, Indonesia
Kant, Win
Department of Geology, Banmaw University, Myanmar
Warmada, I Wayan
Department of Geological Engineering, Gadjah Mada University
Idrus, Arifudin
Department of Geological Engineering, Gadjah Mada University
Setijadji, Lucas Donny
Department of Geological Engineering, Gadjah Mada University
Watanabe, Koichiro
Department of Earth Resource Engineering, Kyushu University, Japan
The Soripesa prospect area is located at Maria village, Wawo district, Bima region in the eastern part of Sumbawa Island, Indonesia. This area is a part of Cenozoic Calc-alkaline volcanic inner Banda-Sunda Arc. The dominant lithology of Soripesa prospect area are a lithic-crystal tuff of andesitic and dacitic composition and bedded limestone. There have five main polymetallic epithermal quartz veins in the Soripesa prospect area, namely, Rini vein, Jambu air vein, Dollah vein, Merpati vein, and Arif vein. Those quartz veins are hosted mainly in andesitic volcaniclastic rocks. Fluid inclusion study on those quartz veins is vey important to know the condition of hydrothermal fluids and their origin. Fluid inclusion study is conducted at the laboratory of Earth Resources Engineering Department, Kyushu University, Japan. Homogenization temperature, freeze temperature, eutectic temperature, and melting temperature can be known from fluid inclusion study. Based on fluid inclusion study, formation temperatures of all veins are between 250–260◦C. Melting temperature is between -0.2 to -3◦C. Based on the melting temperature, salinity (wt.% NaCl equiv.) of fluid inclusions is calculated by using Bodnar’s equation. Paleodepth of formations and pressure of trapping are also estimated by using formation temperature and salinity. Based on Hass (1971) diagram, estimated paleodepths of formations are 270 m for Merpati vein, 400 m for Dollah vein, 480 m for Rini vein, 570 m for Arif vein, and 680 m for Jambu Air vein, respectively. Pressure of trapping can also be estimated from depth of formation, density of lithostatic overburden, and gravity; 72 bars for Merpati vein, 106 bars for Dollah vein, 127 bars for Rini vein, 151 bars for Arif vien, and 180 bars for Jambu Air vein, respectively. Keywords: Soripesa, polymetallic quartz veins, homogenization temperature, salinity.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7199
Journal of Applied Geology; Vol 4, No 2 (2012)
eng
Copyright (c) 2015 Win Kant, I Wayan Warmada, Arifudin Idrus, Lucas Donny Setijadji, Koichiro Watanabe
oai:jurnal.ugm.ac.id:article/7200
2018-03-02T02:01:18Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
Lead Contamination In Soil Of Yogyakarta City, Indonesia
Budianta, Wawan
Department of Geological Engineering, GadjahMada University
This paper investigates on Pb concentrations and mobility in soil of overall Yogyakarta City, Indonesia. The objectives of this study include to investigate Pb concentrations in the surface soil throughout Yogyakarta and to study their possible sources and potential environmental impacts. The soil samples from 168 locations in Yogyakarta was obtained, representing different land use and traffic conditions. Spatial analysis and sequential extraction analysis were performed. Generally, contour pattern of Pb value clearly shows that high value is concentrated in the middle and few north part of the study area, confirmed by traffic condition in the study area. In general, the results of sequential extraction analysis shows that Pb was predominantly associated with exchangeable fraction. The presence of lead in the exchangeable fractions may pose a serious environmental concern since they are highly soluble and potentially bio-available in the soil of study area. Keywords: Soil, lead contamination, GIS, sequential extraction.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7200
Journal of Applied Geology; Vol 4, No 2 (2012)
eng
Copyright (c) 2015 Wawan Budianta
oai:jurnal.ugm.ac.id:article/7201
2018-03-02T02:01:48Z
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Paleogeography And Sedimentation Dynamics Of Ujoh Bilang-Batubelah Limestone Member, Upstream Mahakam River, Ujoh Bilang Area, East Kalimantan Province
Novian, Indra
Department of Geological Engineering, GadjahMada University
Kusuma Wijayanti, Herning Dyah
Department of Geological Engineering, GadjahMada University
-
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7201
Journal of Applied Geology; Vol 4, No 2 (2012)
eng
Copyright (c) 2015 Indra Novian, Herning Dyah Kusuma Wijayanti
oai:jurnal.ugm.ac.id:article/7202
2018-03-02T01:44:18Z
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SITE RESPONSE CHARACTERISTICS OF H/V SPECTRUM BY MICROTREMOR SINGLE STATION OBSERVATIONS AT PALU CITY, INDONESIA
Thein, Pyi Soe
Geological Engineering Department, Faculty of Engineering, Universitas Gadjah Mada
Pramumijoyo, Subagyo
Geological Engineering Department, Faculty of Engineering, Universitas Gadjah Mada
Brotopuspito, Kirbani Sri
Physics Department, Universitas Gadjah Mada, Yogyakarta
Wilopo, Wahyu
Geological Engineering Department, Faculty of Engineering, Universitas Gadjah Mada
Kiyono, Junji
Graduate School of Global Environmental Studies, Kyoto University, Japan
Setianto, Agung
Geological Engineering Department, Faculty of Engineering, Universitas Gadjah Mada
In this study, we estimated predominant period of an H/V spectrum in Palu City, Indonesia, by using microtremor single station observations. Sulawesi Island, eastern Indonesia, is located at the junction between the converging Pacific-Philippine, Indo- Australian Plates and the Eurasian Plate. One of the major structures in Central Sulawesi is the Palu- Koro Fault system, which extends NNW-SSE direction and cross-cuts Sulawesi along more than 300 km from the North Sulawesi trench passing southward through Palu Bay then turn to the southeast, connecting to the Matano and Lawanopo Faults and further eastward both faults join to Tolo trench. Several earthquakes have been known along Palu-Koro Fault system such as Gimpu earthquake (1905), Kulawi earthquake (1907), Kantewu earthquake (1934), and offshore Donggala earthquake (1968) which caused tsunami that destroyed 800 houses and killed 200 people at Donggala district. Palu City, located at the northern tip of Palu depression, is a capital of the Central Sulawesi Province. It is located in the active seismic zone of the Palu-Koro fault. Spectral ratios for horizontal and vertical motion (H/V) from single-station microtremor records were used to identify the predominant periods of the ground vi- brations. Understanding the parameters of predominant period[s] and seismichazard is important for mitigation and environmental planning of the Palu region. Keywords: H/V spectrum, predominant period[s], microtremor single station observation
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7202
Journal of Applied Geology; Vol 5, No 1 (2013)
eng
Copyright (c) 2015 Pyi Soe Thein, Subagyo Pramumijoyo, Kirbani Sri Brotopuspito, Wahyu Wilopo, Junji Kiyono, Agung Setianto
oai:jurnal.ugm.ac.id:article/7203
2018-03-02T01:46:29Z
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GROUND MOTION IN YOGYAKARTA CITY, YOGYAKARTA SPECIAL PROVINCE, INDONESIA ON DENSELY MICROTREMOR OBSERVATIONS AND SHEAR WAVE VELOCITY
Kyaw, Zaw Lin
Geology Department, Yangon University, Yangon, Myanmar
Pramumijoyo, Subagyo
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Husein, Salahuddin
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Fathani, Teuku Faisal
Civil and Environmental Engineering Department, Faculty of Engineering, GadjahMada University
Kiyono, Junji
Department of Urban Management, Graduate School of Engineering, Kyoto University
Microtremor is currently considered the foremost tool in site effect studies. The ground motion is estimated with microtremor observations, meaning that subsoil mechanical properties and geometry are evaluated and from them an estimate of local amplification is computed. Here, the ground motion is studied by the site effects of seismic hazard zonation of urban areas in Yogyakarta City. The main purpose of this paper is zoning the geological engineering features and assessing seismic of the research urban area. In this regard, the microtremors are measured at 274 sites by single station sampling method and Nakamura technique. The microtremors of all over the city are processed by a model of Mitutoyo-GPL-6A3P. The amplification factor generally ranges between 0.70 and 5.56 and the natural frequency normally varies between 0.40 and 3.30 Hz. The information layers are prepared in GMT used for detecting the zonation of potential seismic hazard. The shear wave velocity is calculated in 12 existing drilling sites based on the geotechnical approach of SPT for soil condition. To study the ground motion, geological engineering condition is investigated using amplification factor, natural frequency, shear wave velocity maps which are analyzed using densely single microtremor observation and SPT from existing drilling sites. Keywords: Ground motion, amplification factors, natural frequency; H/V spectral ratio, microtremor observations, Yogyakarta Urban
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7203
Journal of Applied Geology; Vol 5, No 1 (2013)
eng
Copyright (c) 2015 Zaw Lin Kyaw, Subagyo Pramumijoyo, Salahuddin Husein, Teuku Faisal Fathani, Junji Kiyono
oai:jurnal.ugm.ac.id:article/7204
2018-03-02T01:47:39Z
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COMPARISON OF KRIGING AND INVERSE DISTANCE WEIGHTED (IDW) INTERPOLATION METHODS IN LINEAMENT EXTRACTION AND ANALYSIS
Setianto, Agung
Geological Engineering Department, Faculty of Engineering, Universitas Gadjah Mada
Triandini, Tamia
Civil and Environmental Engineering, Ehime University, Matsuyama, Japan
Analysis that is based on geostatistics eliminates many corresponding defects and limitations compared to classical statistics which have been developed by random distribution theory of processes and variables. Interpolation is important for local analysis by GIS, because many maps used for GIS operation are made by interpolation. In this research, two different methods which is Kriging method and Inverse Distance Weighted (IDW) method was examined for developing Digital Elevation Model image. Each method’s advantages and disadvantages were considered. The study are, Kepil, is within Kulon Progo physiographic and stratigraphic area, located in the western part of Yogyakarta city. This area is located close to the Java Island Subduction Zone, hence influence of tectonic plate movement is relatively dominant. Geological structures become a main factor that shapes the recent morphology. This study area also has many settlements and has high weathering and erosion rate. Lineaments are extracted based on Digital Elevation Model to provide assistance in delineating geological structures. The structural geology analysis and an understanding of tectonic phase of the area provide useful information for geological map- ping. Accuracy of lineament depends on extraction and imagery parameters used. In this study, the extraction was conducted by two different raster methods, namely Kriging and Inverse Distance Weighted (IDW) with the same resolution of 30 meters. Lineament extracted automatically (digitally) with certain parameter settings. Keywords: Kriging, inverse distance weighted, interpolation, lineament, random distribution, digital elevation model.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7204
Journal of Applied Geology; Vol 5, No 1 (2013)
eng
Copyright (c) 2015 Agung Setianto, Tamia Triandini
oai:jurnal.ugm.ac.id:article/7205
2018-03-02T01:49:06Z
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HOST ROCKS’ GEOCHEMISTRY AND MINERALIZATION POTENTIAL OF POLYMETALLIC EPITHERMAL QUARTZ VEINS AT SORIPESA PROSPECT AREA, SUMBAWA ISLAND, INDONESIA
Khant, Win
Department of Geology, Shwebo University, Myanmar
Warmada, I Wayan
Department of Geological Engineering, Gadjah Mada University
Idrus, Arifudin
Department of Geological Engineering, Gadjah Mada University
Setijadji, Lucas Donny
Department of Geological Engineering, Gadjah Mada University
Watanabe, Koichiro
Department of Earth Resource Engineering, Kyushu University, Japan
The Soripesa prospect area is located at Maria village, Wawo district, Bima region in the eastern part of Sumbawa Island, Indonesia. This area is a part of Cenozoic Calc-alkaline volcanic inner Banda- Sunda Arc. There are five main polymetallic epithermal quartz veins in the Soripesa prospect area, namely, Rini vein, Jambu air vein, Dollah vein,Merpati vein, and Arif vein. The dominant lithology is a lithic-crystal tuff of andesitic and dacitic composition and bedded limestone. Major oxides and trace elements were analyzed by using X-Ray Fluorescence (XRF) to identify the host rock geochemistry. The main veins are hosted by andesitic and andesitic/ basaltic volcanic host rocks. Major elements compositions are affected by alteration. Based on the trace element data, host rocks of all veins were formed in the volcanic arc basalt (VAB) and island arc basalt (IAB) tectonic settings. Host rocks of Rini vein contain higher amount of precious and base metal elements (Zn, Cu, Pb, and Ag.etc.) than those of other host rocks. Keywords: Soripesa prospect area, lithology, tectonic setting, mineralization.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7205
Journal of Applied Geology; Vol 5, No 1 (2013)
eng
Copyright (c) 2015 Win Khant, I Wayan Warmada, Arifudin Idrus, Lucas Donny Setijadji, Koichiro Watanabe
oai:jurnal.ugm.ac.id:article/7206
2018-03-02T01:50:23Z
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ASSESSMENT OF OPTIMUM YIELD OF GROUNDWATER WITHDRAWAL IN THE YOGYAKARTA CITY, INDONESIA
Eka Putra, Doni Prakasa
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Iqbal, Muhammad
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Hendrayana, Heru
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Putranto, Thomas Triadi
Institute of Hydrogeology, RWTH Aachen, Germany
The high demand of clean water supply and groundwater usages in Yogyakarta City, Indonesia has caused the lowering of groundwater table of about 3 m in average since 1984. This condition is caused by the increase number of groundwater pumping in this city relate to the rising of the urban population, economics condition, education and cultural activities, change of land use and increase number of hotels on this famous tourism city in Indonesia. Therefore, it became necessary to assess the optimum yield from the groundwater system beneath this city which can still preserve the recent level of shallow groundwater. This is important because most of the people in this city depends their daily water supply from shallow dug well. In order to assess the safe yield, a groundwater modeling is conducted. The data used on this modeling was taken from previous research and also primary data collected during this research such as; aquifer geometry, aquifer characteristics, shallow groundwater level, water usage/pumping wells discharge, river discharge and surface water level, and climate data. Prediction of the impact of groundwater pumping was made by increasing the water usage/pumping wells discharge on several scenarios. The result of this modeling shows that the optimum yield of the aquifer beneath Yogyakarta City area is about 125,000 m3/day. Keywords: Optimum yield, groundwater usage, groundwater table, pumping, urban population, shallow dug well.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7206
Journal of Applied Geology; Vol 5, No 1 (2013)
eng
Copyright (c) 2015 Doni Prakasa Eka Putra, Muhammad Iqbal, Heru Hendrayana, Thomas Triadi Putranto
oai:jurnal.ugm.ac.id:article/7207
2018-03-02T01:52:43Z
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IMPROVEMENT OF EXPANSIVE SOIL BY ELECTRO-KINETIC METHOD
Thanh Thuy, Tran Thi
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Eka Putra, Doni Prakasa
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Budianta, Wawan
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Hazarika, Hemanta
Geotechnical Engineering Group, Department of Civil and Structural Engineering, Faculty of Engineering, Kyushu
University
The roadway in Karangjati, Ngawi Regency, East Java, Indonesia, which is underlain by expansive soil, is susceptible to damage due to volume change. This research aims to improve the engineering properties, such as consistency limits, compressibility, and undrained shear strength of the montmorillonite dominated soil in this area using an electrokinetic stabilization method. Four electro-kinetic experiments were conducted using different electrolytes (calcium chloride or pure water) under different conditions (no-flow or flow water). The results show that, pH values of all soil samples decreased at anolyte and increased at catholyte. Atterberg limits of the soil samples were found to increase, where the liquid limit (LL) range of 79.72– 86.14%, plastic limit (PL) 25.22–30.80%, and plasticity index (PI) 53.28–60.92, liquidity Index (LI) 0.91–1.08. The compression index Cc was 0.50– 0.742. Undrained shear strength of treated soil range of 7–11 kPa. Moreover, strengthening degree of the treated soils achieve 304–556%. The soil improvement was achieved by decreasing the Atterberg limits, and compressibility and increasing the undrained shear strength. Applying calcium chloride and flow water condition were the most effective methods for the soil improvement. The mineralogical compositions of the soil samples did not change after the treatment. Keywords: Electro-kinetic stabilization, electro chemical injection, clayey soil improvement.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7207
Journal of Applied Geology; Vol 5, No 1 (2013)
eng
Copyright (c) 2015 Tran Thi Thanh Thuy, Doni Prakasa Eka Putra, Wawan Budianta, Hemanta Hazarika
oai:jurnal.ugm.ac.id:article/7208
2018-03-02T01:41:24Z
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Determination of suitable groundwater quality for agriculture by using GIS application in Bantul Regency, Yogyakarta Special Province, Indonesia
Kong, Chhuon
Institute of Technology of Cambodia
Hendrayana, Heru
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
Setianto, Agung
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
irrigation purposes within Bantul area which is located on Yogyakarta Volcanic Groundwater Basin, 47 existing data points were used complementary with the results of 30 groundwater samples analysis which were collected from dug and tub wells in various locations of study area. ECw, TDS, pH and major cations: Na+, Ca2+, Mg2+, K+,and anions: Cl, HCO 3 , SO2 4 , NO 3 were analyzed as evaluation index. The relative tendency of ion in epm shows Ca2+>K+>Na+>Mg2+ and HCO 3 >Cl>SO2 4 . Variations in groundwater composition by using Mg/Ca vs. Na/Ca molar ratio indicates that the groundwater is close to silicate rock with influence of clastic carbonate rock. Higher salinity approach to the west of the Bantul indicates that groundwater quality is controlled by clastic carbonate rock and expose limestone of Sentolo hills. Groundwater samples fall under class I suggested that groundwater is good and suitable for irrigation based on Doneen’s classification of permeability index and 78.37% is in excellent category by Wilcox classification on N%. According to the SAR values plotted in the USSL diagram, the majority of the groundwater samples belong to C2-S1 and C2-S2 class, indicating medium salinity and low sodium water which can be used for irrigation with little danger. The suitability of groundwater quality for agriculture is determined by thematic maps produced from ArcGIS Spatial Analyst based on FAO guideline. Salinity is the significant problem that has slight to moderate restriction effect on crops productivities in this area. The ECw map indicates that good groundwater quality for crops is at the middle to the east of study area close to Opak River, while at the western irrigation water is affected but yielding no reduction on rice productivity. However, it has slight to moderate restriction on sensitive crops indicated in thematic map of crops land with different yield potential. The agricultural land in which has yield potential of 100%, 90% and 75% is about 2727.90 ha (38.56%), 735.49 ha (10.39%) and 208.98 ha (2.95%) of the study area respectively. Key words: Irrigation groundwater quality, total dissolved solids (TDS), electrical conductivity (EC), evaluation index, ArcGIS Spatial Analyst, FAO guideline, yield potential.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7208
Journal of Applied Geology; Vol 5, No 2 (2013)
eng
Copyright (c) 2015 Chhuon Kong, Heru Hendrayana, Agung Setianto
oai:jurnal.ugm.ac.id:article/7209
2018-03-02T01:40:10Z
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ESTIMATION OF THE GEOLOGICAL STRENGTH INDEX SYSTEM FOR CAVITY LIMESTONE LAYER IN QUARRY AREA, REMBANG, CENTRAL JAVA PROVINCE, INDONESIA
Wijaya, R. Andy Erwin
Department of Mining Engineering, Sekolah Tinggi Teknologi Nasional
Karnawati, Dwikorita
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
Srijono, Srijono
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
Wilopo, Wahyu
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
Limestone mining needs a good mine design which is safe for the environment. Mine design is determined by the rock mass quality. The rock mass quality in each mine location is not necessary the same depending on the geological conditions. The research area is located in limestone quarry of Sale District, Rembang Regency, Center Java Province-Indonesia. In the limestone quarry area, there is cavity zone which consists of cavity limestone layer at the wall of quarry bench. This cavity layer in limestone quarry has occurred by solution process. The cavity layer zone is a potentially weak zone which has caused bench failures in the limestone quarry area. The objective of this research is to analyze the rock mass quality in the cavity limestone layer using Geological Strength Index (GSI) system. Final result of the research is a rock mass characterization, specifically for cavity limestone layer. Keywords: geological strength index, limestone, cavity layer
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7209
Journal of Applied Geology; Vol 5, No 2 (2013)
eng
Copyright (c) 2015 R. Andy Erwin Wijaya, Dwikorita Karnawati, Srijono Srijono, Wahyu Wilopo
oai:jurnal.ugm.ac.id:article/7210
2018-03-02T01:38:21Z
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DETERMINATION OF NUCLEAR POWER PLANT SITE IN WEST BANGKA BASED ON ROCK MASS RATING AND GEOLOGICAL STRENGTH INDEX
Irvani, Irvani
Department of Mining Engineering, Bangka Belitung University, Bangka
Wilopo, Wahyu
Department of Geological Engineering, Gadjah Mada University, Yogyakarta
Karnawati, Dwikorita
Department of Geological Engineering, Gadjah Mada University, Yogyakarta
Indonesian government through the National Atomic Energy Agency has planned to build a nuclear power plant. One of the proposed sites is in West Bangka Regency, Bangka Belitung Archipelago Province. The engineering geology of this area is, however, not fully understood and requires further investigations. Engineering geology investigations were carried out by assessing the rock mass quality and bearing capacity based on field observation and drilling data. The assessment was conducted using Rock Mass Rating (RMR) and Geological Strength Index (GSI) classification. The rock mass in the study area was divided into four units, namely Units of Sandstone, Granite, Mudstone and Pebbly Sandstone. The RMR and GSI values in the study area are influenced by the parameters of discontinuity space density, the slope of discontinuity orientation, grade of weathering and groundwater conditions. The assessment shows that the Granite Unit has the best quality which is shown by the average RMR value of 53 and GSI value of 66. Based on the average RMR value, the Granite Unit is estimated to have cohesion value between 0.2 and 0.3 MPa, friction angle between 25° and 35°, and allowable bearing pressure between 280 and 135 T/m2. Based on the GSI value, the Granite Unit is estimated to have uniaxial compressive strength value between 1.0465 and 183.8 MPa, tensile strength between (-0.0122) and (-5.2625) MPa, rock mass strength values between 24.5244 and 220.351 MPa, and modulus of deformation within a range of 1.73–86.68 GPa. The Granite Unit is considered to be the most appropriate location for the nuclear power plants. Keywords: Nuclear power plant foundation, geological strength index, rock mass rating, rock mass quality
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7210
Journal of Applied Geology; Vol 5, No 2 (2013)
eng
Copyright (c) 2015 Irvani Irvani, Wahyu Wilopo, Dwikorita Karnawati
oai:jurnal.ugm.ac.id:article/7211
2018-03-02T01:36:51Z
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CHARACTERISTICS AND LIQUEFACTION OF COAL FROM WARUKIN FORMATION, TABALONG AREA, SOUTH KALIMANTAN–INDONESIA
Nursanto, Edy
Mining Engineering Department, Faculty of Mineral Technology, Pembangunan Nasional "Veteran" University
Idrus, Arifudin
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Amijaya, Hendra
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Pramumijoyo, Subagyo
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Since the coal characteristic is the main controlling factors in coal liquefaction, thus five coal seams with different coal rank from Warukin Formation in Tabalong Area, South Kalimantan have been used in this study. Three seams were low rank coal (Wara 110, Wara 120, Wara 200) while two seams were medium rank (Tutupan 210 and Paringin 712). The objectives of this study was to investigate the effect of coal rank on the rate of coal conversion factor. Coal liquefaction was conducted in an autoclave on low pressure (14.7 psi) and temperature 120°C. Experiments were designed with time intervals 30, 60 and 90 minutes, respectively. The average coal properties of seam Wara 110, Wara 120 and Wara 200 were 26.65%, 5.08%, 46.26% and 30.60% for inherent moisture, ash content, volatile matter and. fixed carbon, respectively. In contrast, coal properties for seam Tutupan 210 and Paringin 712 were 18.42%, 1.81%, 23.02% and 35.76% for inherent moisture, ash content, volatile matter and fixed carbon, respectively. The maximum yields for Wara 110, Wara 120 and Wara 200 were 48.60% (30 minutes), 51.27% (60 minutes) and 46.72% (90 minutes). In comparison, Tutupan 210 and Paringin 712 resulted maximum yields of 8.22% (30 minutes), 18.35% (60 minutes), 6.23% (90 minutes). In conclusion, low rank coal has higher yield conversion compared to medium rank coal since it has higher H/C ratio. Keywords: Coal liquefaction, low rank coal, Kalimantan.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7211
Journal of Applied Geology; Vol 5, No 2 (2013)
eng
Copyright (c) 2015 Edy Nursanto, Arifudin Idrus, Hendra Amijaya, Subagyo Pramumijoyo
oai:jurnal.ugm.ac.id:article/7212
2018-03-02T01:32:31Z
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CHEMICAL COMPOSITION AND HYDRAULIC CONNECTIVITY OF SPRINGS IN THE SOUTHERN SLOPE OF MERAPI VOLCANO
Boulom, Johnny
Department of Civil and Environmental Engineering, National University of Laos
Eka Putra, Doni Prakasa
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Wilopo, Wahyu
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Springs are easily found in the southern slope of Merapi volcano, Sleman Regency, Yogyakarta Special Province, Indonesia. Springs origins on this location are commonly related to the existing of Merapi Aquifer System, but importance question of all these springs are hydraulic connectivity among them. In response to the issue, the objective of this research is to determine hydraulic connectivity of springs based on their chemical composition. To answer the objectives, measurement of spring discharge and physicochemical properties of spring’s water and sampling of selected spring’s water were conducted on this research in the study area. Water chemistry composition was classify by Kurlov formula and displayed by Fingerprint diagram and Composition diagram. Results show that the chemical compositions of most all spring samples are almost similar and does not significantly different for most properties from upstream to downstream, which are Na–Ca–HCO3 water, only one spring of Umbul Jatiningsih spring had different chemical composition of Ca–Na–Mg– HCO3 water. Based on the Fingerprint diagram and Composition diagram evaluation, the spring’s water can be differentiated into three groups. Group 1 consists of ten springs which have similar chemical composition of Na–Ca–HCO3 and with electrical conductivity ranges between 150 to 200 mS/cm. Group 2 consists only one spring “Umbul Pajangan” which contain similar chemical composition to Group 1 but has significantly higher ions concentration (EC value about 400 mS/cm) and Group 3 consists also only one spring “Umbul Jatiningsih” which has significantly different ionic composition with Group 1 and 2. Regarding on this condition, it can be concluded that Group 1 spring is hydraulically connected and relate to the shallow aquifer system of Merapi Aquifer System. In other side, water of spring “Umbul Pajangan”possibly comes from deeper aquifer system of Merapi Aquifer System and this argument is supported by the spring discharge evaluation. Finally, spring “Umbul Jatiningsih” is originate mainly from different aquifer system of porous limestone aquifer. Keywords: Merapi aquifer system, spring, chemical composition, geological condition
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7212
Journal of Applied Geology; Vol 6, No 1 (2014)
eng
Copyright (c) 2015 Johnny Boulom, Doni Prakasa Eka Putra, Wahyu Wilopo
oai:jurnal.ugm.ac.id:article/7213
2018-03-02T01:30:50Z
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WEATHERING STAGE CONTROL OF TUFF AND ITS INFLUENCE TO THE MALINO–MANIPI LANDSLIDE SUSCEPTIBILITY, SOUTH SULAWESI INDONESIA
Busthan, Busthan
Department of Civil Engineering, Faculty of Engineering, Hasanuddin University
Imran, A.M.
Department of Geology Engineering, Faculty of Engineering, Hasanuddin University
Samang, L.
Department of Civil Engineering, Faculty of Engineering, Hasanuddin University
Ramli, M.
Department of Geology Engineering, Faculty of Engineering, Hasanuddin University
In 2013 there has been 34 incidents of landslides which cut the roads linking between Gowa and Sinjai off. The purpose of this study was to determine the effect on the stage of weathering of landslide in the study area. Methods used in this study are field survey, petrographic analysis, XRD analysis and shear strength testing of rock. Field survey results indicates that the area is dominated by tuffs that are partly volcanic breccia and lava. Petrographic analysis, showing the dominant composition of tuff with volcanic glass, bitownite, pyroxene and opaque minerals, and XRD analysis results indicate weathering tuffs that have experienced high and completely weathered contain smectite and halloysite clay types, and insitu shear strength test results indicate a strong shift to the lower tuff with high stage of weathering. Keywords: Susceptability to landslides, the stage of weathering, halloysite and smectite, shear strength, roads of Malino–Manipi
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7213
Journal of Applied Geology; Vol 6, No 1 (2014)
eng
Copyright (c) 2015 Busthan Busthan, A.M. Imran, L. Samang, M. Ramli
oai:jurnal.ugm.ac.id:article/7214
2018-03-02T01:27:08Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
ROCK MASS RATING OF CAVITY LIMESTONE LAYER IN REMBANG, CENTRAL JAVA, INDONESIA
Wijaya, R. Andy Erwin
Department of Mining Engineering, Sekolah Tinggi Teknologi Nasional
Karnawati, Dwikorita
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
Srijono, Srijono
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
Wilopo, Wahyu
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
mine design. Mine design is determined by the rock mass quality, which varies from one mine location to another, depending on the geological conditions. The research area is located in limestone quarry of Sale District, Rembang Regency, Central Java Province, Indonesia. In the study area, a cavity zone is exposed at the wall of quarry bench and occurs by a solution process. The cavity layer zone is a weak zone which has caused bench failures. The objective of this research is to evaluate the quality of the cavity limestone layer for a safe mine design using Rock Mass Rating (RMR) system. Final result of the research is a rock mass characterization, specifically for the cavity limestone layer. Keywords: Rock mass rating, limestone, cavity layer
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7214
Journal of Applied Geology; Vol 6, No 1 (2014)
eng
Copyright (c) 2015 R. Andy Erwin Wijaya, Dwikorita Karnawati, Srijono Srijono, Wahyu Wilopo
oai:jurnal.ugm.ac.id:article/7215
2018-03-02T01:25:14Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
HIGH SULFIDATION EPITHERMAL MINERALIZATION AND ORE MINERAL ASSEMBLAGES OF CIJULANG PROSPECT, WEST JAVA, INDONESIA
Tun, Myo Min
University of Yangon, Myanmar
Warmada, I Wayan
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Idrus, Arifudin
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Harijoko, Agung
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Verdiansyah, Okki
PT. Aneka Tambang Tbk
Watanabe, Koichiro
Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University
Cijulang is a high-sulfidation epithermal system hosted in the calc-alkaline rocks of andesite lava and lapilli tuff. Mineralization in the prospect is characterized by pyrite-enargite-gold and associated acid sulfate alteration. Studies on ore and gangue mineral assemblages and their mutual textural relationships were carried out in order to explore the paragenetic sequence of mineralization. Hypogene mineralization primarily occurs in the silicic core and the advanced argillic zone in the form of massive replacement, fracture-filling veinlets, vug-filling, patches and dissemination. Mineralization is apparently controlled by both lithology and structures. Common ore minerals include pyrite, enargite, luzonite, tennantite, chalcopyrite, covellite, galena, emplectite and Te-bearing minerals. The paragenetic study indicates that the epithermal prospect evolved from an early stage of intense acid leaching resulting in the formation of vuggy silica and advantage argillic mineral assemblage which was followed by the sulfides deposition. Two metal stages were identified during ore deposition: an early Fe-As-S stage and the later Cu-Fe-As-S stage. The former stage is char- acterized high-sulfidation state sulfides such as enargite/ luzonite+covellite whereas a later stage of Cu- Fe-As–S is represented by intermediate sulfidation state sulfides assemblage of tennantite+chalcopyrite. Gold is probably introduced in the early stage within the ore system and more abundant in the late stage. Keywords: Cijulang, high-sulfidation, acid sulfate, mineralization, enargite, paragenetic, metal stages
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7215
Journal of Applied Geology; Vol 6, No 1 (2014)
eng
Copyright (c) 2015 Myo Min Tun, I Wayan Warmada, Arifudin Idrus, Agung Harijoko, Okki Verdiansyah, Koichiro Watanabe
oai:jurnal.ugm.ac.id:article/7216
2018-03-02T01:21:40Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
GEOCHEMICAL VARIATIONS ON HOSTED VOLCANIC ROCKS OF CIBALIUNG EPITHERMAL GOLD MINERALISATION, BANTEN – INDONESIA: IMPLICATIONS FOR DISTRIBUTION OF SUBDUCTION COMPONENTS
Titisari, Anastasia Dewi
Department of Geological Engineering, Gadjah Mada University
Phillips, David
The University of Melbourne, Australia
Hartono, Hartono
PT. ANTAM (Persero) Tbk
Subduction of the Indo-Australian Plate beneath the Eurasian Plate formed at least seven magmatic arcs in Indonesia. One of the magmatic arcs is the Neogene Sunda-Banda arc hosts various style of gold mineralisation such as Cibaliung epithermal gold mineralisation. Major and trace element data for host volcanic rocks to the Cibaliung epithermal gold mineralisation is provided by this study to identify the magmatic arc system and the distribution of subduction components. Enriched LILE (Large Ion Lithopile Element) and LREE (Light Rare Earth Element) compositions for basaltic andesite – rhyodacitic samples from the Cibaliung district are characteristic of calc-alkaline arcs. In this typical volcanic arc, the subduction component can be shown to make a dominant contribution to its content of LILE such as Rb, K, Th, and Ba enriched (more than 88%) relative to the mantle and within plate inputs. The incompatible elements (Hf, Zr, and Nb) cannot be observed in the subduction component and thus assumed to be derived from trace element enriched sub-continental lithosphere. These incompatible elements are defined as conservative elements therefore it suggests that the magma occurrence is related to a hydrous slab component. Keywords: Subduction, Indo-Australian plate, magmatic arcs, volcanic rocks, Cibaliung, epithermal gold.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7216
Journal of Applied Geology; Vol 6, No 1 (2014)
eng
Copyright (c) 2015 Anastasia Dewi Titisari, David Phillips, Hartono Hartono
oai:jurnal.ugm.ac.id:article/7217
2018-01-15T03:11:13Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
LANDSLIDE SUSCEPTIBILITY ASSESSMENT OF KOKAP AREA USING MULTIPLE LOGISTIC REGRESSION
Makealoun, Somyot
Water Resources Department, Faculty of Engineering, National University of Laos
Eka Putra, Doni Prakasa
Geological Engineering Department, Gadjah Mada University,
Wilopo, Wahyu
Geological Engineering Department, Gadjah Mada University,
A number of landslides have occured in Kokap SubDistrict, Kulon Progo Regency, Yogyakarta Special Province, Indonesia, which have influenced the communities. The natural disaster is commonly associated with a few days of heavy rainfall events. To mitigate the impact of landslides in this area, a landslide susceptibility assessment needs to be carried out. The main objective of this research is to develop a landslide susceptibility zonation in the research area by applying a logistic regression (LR) method. Field observation was conducted at 68 locations in the research area, in which 46 landslides occured. Data of slope angle, lithology, geologic structure and groundwater conditions were collected. The relationship between landslide occurrence and the slope angle, lithology, geologic structure and groundwater conditions was analysed using the LR method. The analysis results showed a 0.984 standard error, implying a good-fit model. The study area was classified into very low, low, moderate, high and very high landslide susceptibility zones with 0–20%, 20–40%, 40–60%, 60–80%, and 80–100%, respectively, probabilities of occurrence. A 60% area of the total study area was classified as a moderate to very high susceptibility to landslide. From 47 landslides, 80% landslides occured in high and very high landslide susceptibility zones, 17% landslides occured in the moderate susceptibility zone and 2% landslides occured in the low susceptible zone. None of landslides occured in the very low landslide susceptibility zone. The analysis results show that LR method is a very useful method for landslide prediction. Keywords: landslide susceptibility, multiple logistic regression, Kokap Kulon Progo-Indonesia
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7217
Journal of Applied Geology; Vol 6, No 2 (2014)
eng
Copyright (c) 2015 Somyot Makealoun, Doni Prakasa Eka Putra, Wahyu Wilopo
oai:jurnal.ugm.ac.id:article/7218
2018-01-15T03:14:09Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
FLUID INCLUSION STUDIES OF THE EPITHERMAL QUARTZ VEINS FROM SUALAN PROSPECT, WEST JAVA, INDONESIA
Tun, Myo Min
Department of Geology, Mandalay University, Mandalay
Warmada, I Wayan
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Idrus, Arifudin
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Harijoko, Agung
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Verdiansyah, Okki
PT. Aneka Tambang Tbk.-Unit Geomin
Watanabe, Koichiro
Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University
Sualan prospect is located at Talegong Sub-district of Garut Regency, West Java, Indonesia. The area constitutes calc-alkaline volcanic and volcaniclastic rocks of Tertiary age. The rocks have experienced regional propylitic and argillic alteration. Fluid inclusions from quartz veins were studied in order to constrain the nature, characteristics and evolution of fluids. Microthermometric measurements on fluid inclusion were carried out by freezing and heating experiment. Temperatures of homogenization (Th) and final melting of ice (Tm) were measured for primary, liquid-dominated, two-phase inclusions. The values of Th range from 160°C to 210°C and salinities range from 0.35 to 4.96 wt.% NaCl equiv. Formation temperature of the quartz veins are estimated at 180°C and 190°C and paleo-depth of formation are at 80m and 140m, respectively. Microthermometric data indicates that fluid mixing and dilution were important processes during the evolution of hydrothermal system. Based on fluid inclusion types, microthermometric data, trapping temperature, paleo-depth, texture of quartz and hydrothermal alteration types, quartz veins from prospect were developed under epithermal environment. Keywords: Quartz vein, fluid inclusions, microthermometry, salinities, formation temperature, paleo-depth, epithermal, Sualan prospect.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7218
Journal of Applied Geology; Vol 6, No 2 (2014)
eng
Copyright (c) 2015 Myo Min Tun, I Wayan Warmada, Arifudin Idrus, Agung Harijoko, Okki Verdiansyah, Koichiro Watanabe
oai:jurnal.ugm.ac.id:article/7219
2018-01-15T03:17:12Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
METAMORPHIC EVOLUTION OF GARNET–BIOTITE–MUSCOVITE SCHIST FROM BARRU COMPLEX IN SOUTH SULAWESI, INDONESIA
Setiawan, Nugroho Imam
Geological Engineering Department, Faculty of Engineering, Universitas Gadjah Mada
Osanai, Yasuhito
Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University
Nakano, Nobuhiko
Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University
Adachi, Tatsuro
Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University
This paper explains the first report in metamorphic evolution of pelitic schist from Barru Complex in South Sulawesi, Indonesia. Garnet-biotitemuscovite schist was examined petrologically to assess the metamorphic evolution history, which has implications on tectonic condition of this region. The rock mainly composed of garnet, biotite, muscovite, epidote, quartz, rutile, hematite, and plagioclase. Inclusions in the garnet preserve records of prograde stage of this rock, which are epidote, titanite, quartz, and apatite. Garnet, biotite, muscovite, quartz, rutile, and plagioclase are concluded as equilibrium assemblages at peak P-T condition of this rock, which estimated at 501–562 ºC and 0.89–0.97 GPa. The result is still on the ranges of the estimated geothermal gradient P-T path of eclogite from Bantimala Complex. Similar geothermal gradients of metamorphisms might be indicated that these metamorphic rocks were metamorphosed on the similar tectonic environments. Keywords: Pelitic schist, Barru Complex, South Sulawesi, metamorphic evolution.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7219
Journal of Applied Geology; Vol 6, No 2 (2014)
eng
Copyright (c) 2015 Nugroho Imam Setiawan, Yasuhito Osanai, Nobuhiko Nakano, Tatsuro Adachi
oai:jurnal.ugm.ac.id:article/7220
2018-01-15T03:19:50Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
AN EVALUATION OF ROCK SLOPE STABILITY USING LIMIT EQUILIBRIUM ANALYSES
Aprilia, Faridha
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
Indrawan, I Gde Budi
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
The stability of rock slopes is controlled by several factors, such as the intact rock strength, discontinuity characteristics, groundwater condition, and slope geometry. Limit equilibrium (LE) analyses have been commonly used in geotechnical practice to evaluate the stability of rock slopes. A number of methods of LE analyses, ranging from simple to sophisticated methods, have been developed. This paper presents stability analyses of rock slopes at the Batu Hijau open mine in Sumbawa Barat using various methods of LE analyses. The LE analyses were conducted at three cross sections of the northern wall of the open mine using the Bishop Simplified, Janbu Simplified, Janbu Generalised, and General Limit Equilibrium (GLE) methods in Slide slope stability package. In addition, a Plane Failure (PF) analysis was performed manually. Shear strength data of the discontinuity planes used in the LE analyses were obtained from back analyses of previous rock slope failures. The LE analysis results showed that the rock slopes were likely to have shallow non-circular critical failure surfaces. The factor of safety (Fs) values obtained from the Bishop Simplified, Janbu Simplified, Janbu Generalised, and GLE methods were found to be similar, while the Fs values obtained from the PF method were higher than those obtained from the more rigorous methods. Keywords: Batu Hijau mine, Bishop Simplified, Janbu Simplified, Janbu Generalised, limit equilibrium analyses, general limit equilibrium, rock slope stability, plane failure.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7220
Journal of Applied Geology; Vol 6, No 2 (2014)
eng
Copyright (c) 2015 Faridha Aprilia, I Gde Budi Indrawan
oai:jurnal.ugm.ac.id:article/7221
2018-01-15T03:24:56Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
DYNAMIC MORPHOLOGICAL CHANGES OF SPIT IN APRIL–MAY 2014 IN OPAK RIVER MOUTH, BANTUL, DAERAH ISTIMEWA YOGYAKARTA
Freski, Yan Restu
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
Setianto, Agung
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
Srijono, Srijono
Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada
As an oceanic coast, the beaches in the southern part of Java Island are predominantly influenced by ocean energy which is driven by periodical monsoon. This periodical process impacts the dynamic changes of spit in the river mouth system. Therefore, spit is a key to study the process in the southern coast of Java Island especially in Opak River Mouth. It needs a deep-root explanation about the morphological changes and the sedimentological mechanism. This research project was built by data such as spit geometry, aerial photographs and spontaneous wind direction. The supporting data included multitemporal IKONOS-Quickbird images from Google Earth and aerial photographs. These data were collected from field-work investigation and laboratorywork. The spit geometry was compiled by Global Positioning System handheld tracking along the edge of spit and crosschecked by aerial photograph using pole. The ultimate interpretation and periodic models were built by data reconstruction based on the geometry of spit and spontaneous wind direction. Spit changed weekly due to monsoon transition in April to May 2014. The morphological changes could be noted as the spit starting to be cut off by the highrate flow of Opak River. The process continued until the net drift moving westward. Keywords: April, coast, May, Opak river mouth, spit.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7221
Journal of Applied Geology; Vol 6, No 2 (2014)
eng
Copyright (c) 2015 Yan Restu Freski, Agung Setianto, Srijono Srijono
oai:jurnal.ugm.ac.id:article/7222
2018-01-15T03:27:12Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
ESTIMATION OF SUBSURFACE STRUCTURE BASED ON MICROTREMOR, BORE HOLE OBSERVATIONS AND STOCHASTIC STRONG GROUND MOTION SIMULATIONS IN PALU CITY, CENTRAL SULAWESI, INDONESIA: A VALIDATION AND SENSITIVITY STUDY ON THE 23 JANUARY 2005 (PALU) EARTHQUAKE
Thein, Pyi Soe
Geology Department, Yadanabon University, Mandalay, Myanmar
Pramumijoyo, Subagyo
Geological Engineering Department, Favulty of Engineering, Gadjah Mada University,
Wilopo, Wahyu
Geological Engineering Department, Favulty of Engineering, Gadjah Mada University,
Setianto, Agung
Geological Engineering Department, Favulty of Engineering, Gadjah Mada University,
Brotopuspito, Kirbani Sri
Physics Department, Gadjah Mada University
Kiyono, Junji
Graduate School of Global Environmental Studies, Kyoto University, Kyoto, Japan
In this study, we investigated the subsurface structure and strong ground motion parameters for Palu City. One of the major structures in Central Sulawesi is the Palu-Koro Fault system. Several powerful earthquakes have struck along the Palu-Koro Fault during recent years, one of the largest of which was an M 6.3 event that occurred on January 23, 2005 and caused several casualties. Following the event, we conducted a microtremor survey to estimate the shaking intensity distribution during the earthquake. From this survey we produced a map of the peak ground acceleration, velocity and ground shear strain in Palu City. We performed single observations of microtremors at 151 sites in Palu City. The results enabled us to estimate the site-dependent shaking characteristics of earthquake ground motion. We also conducted 8-site microtremor array investigation to gain a representative determination of the soil condition of subsurface structures in Palu. From the dispersion curve of array observations, the central business district of Palu corresponds to relatively soil condition with Vs ≤ 300 m/s, the predominant periods due to horizontal vertical ratios (HVSRs) are in the range of 0.4 to 1.8 s and the resonant frequency are in the range of 0.7 to 3.3 Hz. Three boreholes were throughout the basin especially in Palu area to evaluate the geotechnical properties of subsurface soil layers. The depths are varying from 1 m to 30 m. Strong ground motions of the Palu area were predicted based on the empirical stochastic green’s function method. Peak ground acceleration and peak ground velocity becomes more than 0.04 g and 30 kine in some areas, which causes severe damage for buildings in high probability. Keywords: Palu-Koro fault, microtremor, bore holes, peak ground acceleration and velocity.
Geological Engineering Department Universitas Gadjah Mada
2015-08-25 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7222
Journal of Applied Geology; Vol 6, No 2 (2014)
eng
Copyright (c) 2015 Pyi Soe Thein, Subagyo Pramumijoyo, Wahyu Wilopo, Agung Setianto, Kirbani Sri Brotopuspito, Junji Kiyono
oai:jurnal.ugm.ac.id:article/7223
2015-09-01T23:53:07Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
PRELIMINARY EVALUATION OF LOCAL SITE CONDITON IN YOGYAKARTA BASIN
Naing, Tun
Pramumijoyo, Subagyo
Kawase, Hiroshi
The Yogyakarta Basin can be defined as NE – SW elongated depression zone of 20 km in width and 45 km in length, trending from Yogyakarta City in north to the Indian Ocean in south. The local geologic and soil conditions have a great influence on the intensity of ground motion and earthquake damage. Local site effects play an important role in earthquake-resistant design and must be accounted for on a case by case basis. Local site conditions can profoundly influence all of the important characteristics such as amplitude (peak acceleration, velocity and displacement), frequency content and duration of strong ground motion. The extent of their influence depends on the geometry and material properties of subsurface materials. Therefore, subsurface investigation was carried out through nine boreholes throughout the basin. Based on drill-logs, collected samples and laboratory test results, the subsurface soil profiles of nine areas in the basin are simplified for future strong ground motion simulation. Five subsurface layers in Tampuran, Krajan areas and six subsurface soil layers in Watu, Jl. Parangtritis, Wijirejo areas and seven layers in Jl. Parangtritis, Karang Semut, Bambang Lipuro areas and eight layers in Pranti area, have been simplified and the geotechnical properties of each layer have been evaluated as well.
Keywords: Basin, Yogyakarta, depression, ground motion, earthquake.
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7223
Journal of Applied Geology; Vol 1, No 1 (2009)
eng
Copyright (c) 2015 Tun Naing, Subagyo Pramumijoyo, Hiroshi Kawase
oai:jurnal.ugm.ac.id:article/7224
2015-09-01T23:55:00Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
GEOLOGICAL CONSIDERATION FOR CO2 STORAGE IN INDONESIA: A BASINAL SCALE OUTLOOK
Amijaya, Hendra
Carbon dioxide capture and storage (CSS) is alternative of reducing atmospheric emissions of CO2. The concepts of CO2 storage refer to the injection of carbon dioxide in dense form into aquifers, which basically must meet several conditions. Three types of geological formations that can be used for the geological storage of CO2 are oil and gas reservoirs, deep saline formations and unmineable coal beds. Indonesia has 60 Tertiary basins, however that great precautions must be taken for selecting particular sedimentary basin in Indonesia for carbon dioxide storage because of high possibility of leakage and the need to find deep formations as CO2 host since the geothermal gradient is high. One possibility to find proper basins is by selected “mature” basin as the detailed geological conditions are well known. Candidates are are North East Java or South Sumatra Basins.
Keywords: Carbon dioxide capture, storage, emission, basin.
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7224
Journal of Applied Geology; Vol 1, No 1 (2009)
eng
Copyright (c) 2015 Hendra Amijaya
oai:jurnal.ugm.ac.id:article/7225
2015-09-01T23:56:49Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
OVERVIEW OF DEEP GEOLOGICAL CO2 STORAGE AND ITS AREA SELECTION METHOD
Setijadji, Lucas Donny
Geological sequestration of CO2 inside deep geologic formations is revolutionary among several other initiatives to combat the global warming. This method is already approved globally as a reliable and likely to be the only option that will allow removing CO2 in large enough quantities over short enough times to make a real difference. The first step of any geological CO2 storage projects is to select appropriate sedimentary basins in which CO2 will be injected and stored temporarily or permanently within permeable geological layers. The criteria for site selection methods are here explained based on summary from stateof-the-art research findings now exist. This method is planned to be applied for a more detailed mapping of potential sedimentary basins in Indonesia and neighboring regions.
Keywords: Sequestration, sedimentary basin, geological layers.
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7225
Journal of Applied Geology; Vol 1, No 1 (2009)
eng
Copyright (c) 2015 Lucas Donny Setijadji
oai:jurnal.ugm.ac.id:article/7226
2015-09-02T00:00:54Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
SUMMARY OF RESEARCH WORK ON THE EVALUATION ON LONG TERM STABILITY OF ARTIFICIAL SLOPE PROTECTION
Soty, Ros
Karnawati, Dwikorita
Aoki, Kenji
Application of GPR, RedExplorer1.4 and GeoStudio2004 have been used to evaluate the overall stability condition of a steep slope along Kalibawang irrigation channel km 8.5, Kulon Progo Regency, Yogyakarta Special Province, Indonesia, that this slope slid down in 1990 and was restabilized by cut to be gentler and covered by shotcrete. Topographic map and engineering geological map in scale 1:2000 have been established prior to the detail investigation. Three drilling logs with in-situ test, SPT and CPT, and samplings have been made and sent to soil mechanic laboratory for index properties tests, and a slope profile along the main axe will be also created for stability analysis through GeoStudio2004. Moreover, GPR has been used to run on a full slope surface to detect the distribution of fractures and/or cavities behind the shotcrete and the results have been interpreted by the aid of RedExplorer1.4.Three profiles showing the rate and depth of fractures and/or cavities are established whereas the slope stability analysis through GeoStudio2004 is the next target of the research. The author is expecting the result from the integration of GPR interpretation and GeoStudio2004 to figure out the overall stability with respect to its existing conditions and its own geometry.
Keywords: GPR, GeoStudio2004, overall stability, fracture and/or cavities.
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7226
Journal of Applied Geology; Vol 1, No 2 (2009)
eng
Copyright (c) 2015 Ros Soty, Dwikorita Karnawati, Kenji Aoki
oai:jurnal.ugm.ac.id:article/7227
2015-09-02T00:06:03Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
THE OCCURRENCE OF PALAEOZOIC CONGLOMERATIC ROCKS IN EAST JOHOR, PENINSULAR MALAYSIA
Surjono, Sugeng Sapto
Leman, Mohd Shafeea
Mohamed, Kamal Roslan
Ali, Che Aziz
Conglomeratic rocks in East Johor are found in the separately three formations that are the Murau, Tanjung Leman and Linggiu Formations. The Murau Formation is characterized by cobble to boulder grained breccia with very angular to angular and disorganized clasts. It was deposited by fan-delta system in the sub-aerial to shallow marine environment. The Tanjung Leman Formation consists of pebble to cobble grained conglomerate with rounded to subrounded and organized clasts. It was deposited by braided river system in the sub-aerial environment. Both formations outcropped in eastern coastal of Johor. The rudaceous rocks of the Linggiu Formation consist of pebble to cobble-sized clasts with sub angular and disorganized texture. It present as subordinate rocks within sandstone dominant in the central part of East Johor and was deposited by debris flows in the shallow marine environment. All these rudaceous rocks were interpreted as Palaeozoic in age ranging from Late Carboniferous to Late Permian. Those rudaceous rocks indicated that since Late Carboniferous, palaeogeography of East Johor was a continent with subaerial to shallow marine depositional environment.
Keywords: Conglomerate, Palaeozoic, East Johor, subaerial, shallow marine.
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7227
Journal of Applied Geology; Vol 1, No 2 (2009)
eng
Copyright (c) 2015 Sugeng Sapto Surjono, Mohd Shafeea Leman, Kamal Roslan Mohamed, Che Aziz Ali
oai:jurnal.ugm.ac.id:article/7228
2015-09-02T00:08:18Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
ESTIMATION OF S-WAVE VELOCITY STRUCTURES IN YOGYAKARTA BASIN, INDONESIA
Naing, Tun
Pramumijoyo, Subagyo
Kawase, Hiroshi
For the theoretical simulation or prediction of strong ground motion, it is prime importance to get information of underground structures, especially for sedimentary layers overlying on bedrock, like in Yogyakarta Basin. The Standard Penetration Test, Spectral Analysis of Surface Wave (SASW) and other geotechnical properties are used to estimate S–wave velocity structures in this basin. SPT tests were conducted at nine sites and SASW measurements were performed at seventeen sites. As a result, the S-wave velocity structures of top 30 m depth had been evaluated in each site. The average shear wave velocity v30 s had been successful estimated and the sites are classified into three types; soft soil, medium dense soil and hard soil. All sites where SPT performed are on soft soil according to their v30 s . However, according to v30 s from SASW measurements, 10 sites are located on medium dense soils type, 5 sites on dense soils and 2 sites on soft soils. The acceptable equivalent S-wave velocitystructure is observed by comparing the results from SASW and geotechnical approach in Imogiri, Bambang Lipuro, Pundong (Watu, Pranti) and Pandak (Wijirejo) areas.
Keywords: Ground motion, underground structure, sedimentary layer, SPT, SASW, Pundong
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7228
Journal of Applied Geology; Vol 1, No 2 (2009)
eng
Copyright (c) 2015 Tun Naing, Subagyo Pramumijoyo, Hiroshi Kawase
oai:jurnal.ugm.ac.id:article/7229
2015-09-02T00:18:33Z
jag:ART
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"150902 2015 eng "
2502-2822
2086-5104
dc
MODIFIED NATURAL ZEOLITE AND BENTONITE AS ADSORBENTS OF HEAVY METAL IONS FROM POLLUTED GROUNDWATER IN YOGYAKARTA URBAN ARE, INDONESIA
Pich, Bunchoeun
Warmada, I Wayan
Hendrayana, Heru
Yoneda, Tetsuro
Groundwater quality in Yogyakarta city has become the major concern due to the presence of heavy metals originated from batik home industries, slaughterhouses, and leather factories, especially in shallow groundwater. In response to the above problems, the naturally abundant zeolite and bentonite in Sidomulyo and Bandung areas were respectively sampled along with the metal-containing groundwater in Yogyakarta urban area for batch adsorption experiment. Before put into experiment, the zeolite and bentonite were characteristically investigated by means of XRD, SEM, chemical composition, and physical property analyses. Also, they were thermally activated to improve their qualities in terms of increase in CEC, whereas the groundwater was analyzed for heavy metal concentrations (Cd, Cr, Cu, Fe, Zn) and its physical property. Five logarithmic amounts of this modified zeolite or bentonite were separately and incrementally introduced into the same three solutions of heavy metals. After the experiment, all the solutions were re-analyzed for the rest of heavy metals to figure out the optimum adsorption capacity of zeolite and bentonite. The outcomes of this experiment will be beneficial in enhancing the groundwater quality for consumptions in Yogyakarta city as well as other places in Indonesia, and will also imply the zeolite and bentonite in commercialization.
Keywords: zeolite, bentonite, groundwater, heavy metal, adsorption
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7229
Journal of Applied Geology; Vol 2, No 1 (2010)
eng
Copyright (c) 2015 Bunchoeun Pich, I Wayan Warmada, Heru Hendrayana, Tetsuro Yoneda
oai:jurnal.ugm.ac.id:article/7230
2015-09-02T00:21:24Z
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"150902 2015 eng "
2502-2822
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ESTIMATION, REALITY AND TREND OF GROUNDWATER NITRATE CONCENTRATION UNDER UNSEWERED AREA OF YOGYAKARTA CITY – INDONESIA
Eka Putra, Doni Prakasa
In the last two decades, urbanization has transformed Yogyakarta City expanding beyond its administrative area with about one million inhabitants. The City sited on shallow unconfined aquifer has rapidly changed without appropriate access to sanitation and piped water supply. Until now, only 9% of the urban population is served by sewers system and less than 30% of urban population have access to clean water which supplied by the local public water-work. Most of the urban population depend on shallow groundwater for much of their water supply. Regards to the massive used of on-site sanitation systems in the city, contamination of nitrate in shallow groundwater is predicted to occur and surveys of domestic dug wells have revealed a widespread nitrate contamination of the groundwater. Comparison of groundwater nitrate and chloride concentration from several old data and the latest data shows clearly an evidence of the increasing of nitrate concentration and nitrate leaching in the shallow groundwater under Yogyakarta City overtime. Considering the trend, it is no doubt that most of nitrate concentration under urbanized area in the Yogyakarta City will be greater than 50 mg/L in the next several years, if appropriate management action to deal with the on-site sanitation system is not conducted.
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7230
Journal of Applied Geology; Vol 2, No 1 (2010)
eng
Copyright (c) 2015 Doni Prakasa Eka Putra
oai:jurnal.ugm.ac.id:article/7231
2015-09-02T00:24:21Z
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"150902 2015 eng "
2502-2822
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ESTIMATION OF MAXIMUM EARTHQUAKE MAGNITUDE OF EARTHQUAKE POTENTIALS FOR YOGYAKARTA DEPRESSION AREA, INDONESIA
Thant, Myo
Pramumijoyo, Subagyo
Hendrayana, Heru
Kawase, Hiroshi
Adi, Agus Darmawan
Maximum magnitudes of earthquake potentials are estimated for Yogyakarta depression area by using the faultlength and earthquake magnitude relations for fault specific seismic sources. For estimation of maximum earthquake magnitude, the fault specific seismic sources are modeled as 18 normal faults and 6 strike-slip faults sources referring the geological map of McDonald, 1984 and Rihardjo et al., 1995. For the present area the subduction zone earthquakes are expected to happen in the offshore region regarding the study on the seismicity of the region and the focal mechanisms of the past earthquakes. So three area sources are also assumed for this region and the possible maximum earthquake magnitudes for these sources are determined by probabilistic approaches.
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7231
Journal of Applied Geology; Vol 2, No 1 (2010)
eng
Copyright (c) 2015 Myo Thant, Subagyo Pramumijoyo, Heru Hendrayana, Hiroshi Kawase, Agus Darmawan Adi
oai:jurnal.ugm.ac.id:article/7232
2015-09-02T00:27:41Z
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"150902 2015 eng "
2502-2822
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CHARACTERIZATION OF JULY 17, 2006 TSUNAMIITE AT SOUTH COAST OF WEST JAVA
Amijaya∗, Hendra
Ngisomuddin, Ngisomuddin
Akmaluddin, Akmaluddin
July 17, 2006 tsunami which occurred in Indian Ocean had swept most of the south coast of Java, especially at Pangandaran area, West Java. The tsunami wave transported and deposited sediment known as tsunamiite, with various compositions. Three different textural characteristics have been recognized on the tsunami sediment deposit. First type is on the tsunamiite found at West Pangandaran Beach, which is darker than the older beach sediment and separated by erosional surface. The sedimentary structures are parallel lamination and current ripple. The grains have no fining trend in vertical as well as lateral direction. Whereas the second type is found at East Pangandaran Beach, which is brighter than the older beach sediment and also separated by erosional surface. The sedimentary structures are cross lamination on the lower layer, parallel lamination on the middle layer and massif on the upper layer. The grains have no fining trend in vertical and lateral direction Benthic foraminifera is one of organism which is transported and deposited as tsunami deposit on the coast. Ammonia beccarii, Elphidium advenum, Amphistegina lessonii, Cibicides sp., Biginerina irregularis, Bolivina plicata, Bathysiphon sp., Nodosaria andQuinqueloculina were found in the recent tsunami deposit from Pangandaran. Based on the benthic foraminifera contents, it can be inferred that the sediments came from lagoonal until deep sea (abyssal) environment.
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7232
Journal of Applied Geology; Vol 2, No 1 (2010)
eng
Copyright (c) 2015 Hendra Amijaya∗, Ngisomuddin Ngisomuddin, Akmaluddin Akmaluddin
oai:jurnal.ugm.ac.id:article/7233
2015-09-02T00:30:04Z
jag:ART
nmb a2200000Iu 4500
"150902 2015 eng "
2502-2822
2086-5104
dc
JATIBARANG LANDFILL OF SEMARANG CITY: IS IT POTENTIAL AS THE WATER CONTAMINATION SOURCE?
Hendrayana, Heru
Eka Putra, Doni Prakasa
T. Putranto, Thomas
Xaixongdeth, Ponhalath
Like other million inhabitants Cities, Semarang which is the capital city of Central Java Province in Indonesia has a problem in solid waste management. One biggest landfill in the City is the Jatibarang Landfill. The landfill operated since 1992 and currently receives the domestic waste of about 337 ton/day with total volume of about 5.2 million m3 of solid waste. It located on the hill slope of sandstone tertiary rocks and relatively closed to the river of Kreo (which is the main source of drinking water for Semarang City). In order to evaluate the potentiality of landfill as the contamination source to groundwater and surface water, the quality of leachates were analyzed and the hydrogeology of the area was re-studied. Result of the study show that the leachates contain high chloride concentration of about 2600 mg/L however low concentration of heavymetals. Hydrogeology study show evidence that this leachate is already enters the groundwater system. However its load to the river can be neglected due to the fact that the chloride mass flux derived from the study area was significantly low comparing to the net river loads.
Key Word: landfill, water contamination, chloride, groundwater and surface water interaction
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7233
Journal of Applied Geology; Vol 2, No 1 (2010)
eng
Copyright (c) 2015 Heru Hendrayana, Doni Prakasa Eka Putra, Thomas T. Putranto, Ponhalath Xaixongdeth
oai:jurnal.ugm.ac.id:article/7234
2015-09-02T00:32:58Z
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"150902 2015 eng "
2502-2822
2086-5104
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GEORADAR INVESTIGATION AT THE KEDULAN TEMPLE EXCAVATION SITE, KALASAN, YOGYAKARTA
Husein, Salahuddin
Samodra, Saptono Budi
Pramumijoyo, Subagyo
Astuti, Wahyu
Kedulan Site is the buried and ruined 9th century Mataram Hindu Kingdom temple, located in Tirtomartani Village, Kalasan District, Sleman Regency, Yogyakarta Special Province. This temple was incidentally discovered by sand diggers on 24 November 1993 under several meter thick of fluvio-volcanic deposit of the modern Merapi. Several technical studies were needed to carefully excavate the temple, including geology and geophysical approaches. One of the geophysical method have been applied was ground penetration radar (georadar). This method uses radar technology to obtain a continuous profile of the shallow sub-surface and thus allows scientists to image soil substratums based on differing dielectric constants. Georadar investigation by Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada, was conducted on 4 December 2007. The main purpose was to identify the location of the outer stone fence as an estimation to define the temple site area to be excavated. About one line was chosen to cross the site in north-south direction in a distance of 328 m. Two runs were completed on the same line but different courses, i.e. forward and backward, where one was checked with another. The result indicates the presence of the outer stone fence was possibly buried in a depth of 7 m. It was located about 40 m distance outside the inner stone fence. Assuming the fences were quadrangle relative to the main temple, hence it is estimated that the site area to be excavated is about 13.830 m² and total 96.808 m³ gravels and sands to be removed.
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7234
Journal of Applied Geology; Vol 2, No 1 (2010)
eng
Copyright (c) 2015 Salahuddin Husein, Saptono Budi Samodra, Subagyo Pramumijoyo, Wahyu Astuti
oai:jurnal.ugm.ac.id:article/7235
2015-09-02T00:37:36Z
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"150902 2015 eng "
2502-2822
2086-5104
dc
MERCURY AND ARSENIC CONTAMINATION FROM SMALL SCALE GOLD MINING ACTIVITIES AT SELOGIRI AREA, CENTRAL JAVA, INDONESIA
Harijoko, Agung
Htun, Tin May
Saputra, Rodhie
Warmada, I Wayan
Setijadji, Lucas Donny
Imai, Akira
Watanabe, Koichiro
Small scale gold mines discussed here are located at Selogiri area, Central Java, Indonesia which was mined by local community mainly during gold rush in 1990s. This Selogiri gold deposit genetically is characterized by porphyry mineralization overprinted by epithermal system. The ore minerals assemblage consists of pyrite, sphalerite, chalcopyrite, galena, chalcocite and rare arsenopyrite.
Chemical analysis of soil and stream sediment sampled over 1.5 km across at the Selogiri gold extraction site indicates that the site has been contaminated with mercury due to mining activities. The mercury concentrations in soil and stream sediments collected during dry season range from 0.01 to 481 ppm and 0.01 to 139 ppm, respectively, higher than background value of 0.05 ppm. In contrast, mercury concentration in stream sediments collected during rainy season from the same location as dry season sampling ranges from 0.01 to 13.42 ppm, and one sample has anomalous value of 331 ppm. This result show that rain water may disperse and decrease mercury concentration in stream sediments.
In case of arsenic, although the ore contains rare arsenic minerals, arsenic concentration in bulk rock and ore is high ranging from 8 to 59 ppm, while the arsenic concentration in tailing is much higher ranging from 5.8 to 385 ppm. Chemical analyses on pyrite reveal that the pyrite grains contain arsenic and might be the source of arsenic in Selogiri mine site. However, analysis of dug-well water demonstrates that the mercury and arsenic content is still lower than the maximum allowable concentration.
Keywords: Mercury, arsenic, contamination, Selogiri, gold mine
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7235
Journal of Applied Geology; Vol 2, No 1 (2010)
eng
Copyright (c) 2015 Agung Harijoko, Tin May Htun, Rodhie Saputra, I Wayan Warmada, Lucas Donny Setijadji, Akira Imai, Koichiro Watanabe
oai:jurnal.ugm.ac.id:article/7236
2015-09-02T00:39:30Z
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"150902 2015 eng "
2502-2822
2086-5104
dc
CHATODOLUMINESCENCE MICROSCOPIC ANALYSIS TO INTERPRET THE REDOX CONDITION DURING THE FORMATION OF CARBONATE VEIN
Warmada, I Wayan
Hartati, Retno
Cathodoluminescence (CL) is generated by an electron gun coupled to an optical microscope. There are two types of chatodoluminescence, i.e., cold CL and hot CL. In the cold cathode microscopic equipment, the electrons are generated by an electric discharge between two electrodes under a low gas pressure, whereas in the hot CL microscope, the electrons are generated by heating a filament (2000–3000°C). In this paper we utilize cold CL combine with electron microprobe analysis (EMPA). The CL microscopy of carbonate shows at least three carbonate generations, i.e., rhodochrosite with dull or no luminescence, Mg-rich calcite with dark red luminescence, manganese-bearing calcite with up to 0.04 wt.% Mn with bright orange luminescence, and pure calcite and Mn-rich calcite (> 0.15 wt.% Mn) with dull or no luminescence. The result also suggests that the luminescence pattern of calcite is controlled by the amount of Mn2+. Sectoral zoning and chevron-shape growth zoning exist in some coarse-grained calcite aggregates. The sectorial zoning of calcite as reflected by dull to bright CL color indicated that slightly to more reducing environment during calcite deposition.
Keywords: Chatodoluminescence, rhodochrosite, calcite, sectorial zoning
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7236
Journal of Applied Geology; Vol 2, No 1 (2010)
eng
Copyright (c) 2015 I Wayan Warmada, Retno Hartati
oai:jurnal.ugm.ac.id:article/7249
2015-09-05T02:35:42Z
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"150905 2015 eng "
2502-2822
2086-5104
dc
Evaluation of strong ground motion for Yogyakarta depression area, Indonesia
Thant, Myo
Pramumijoyo, Subagyo
Hendrayana, Heru
Kawase, Hiroshi
Adi, Agus Darmawan
The probabilistic seismic hazard maps are developed for Yogyakarta depression area. The earthquake catalog of ANSS (1970-2007) is taken into account with the complement of NEIC (USGS, 1973-2007) and the records of BMG (2000-2004). On the basis of seismicity of the area, tectonics and geological information, the seismic source zones are characterized for this area. The seismicity parameters of each seismic source are determined by applying the classical Gutenberg-Richter recurrence model, regarding the historical records. The attenuation relation for Yogyakarta depression area cannot be evaluated since the sufficient strong ground motion records are not available for this region. Therefore the attenuation relations which were developed for other territories as Europe and Japan are used for the present hazard calculation by validating, using the aftershocks records, modeling the peak ground acceleration maps for the recent event, 27 May, 2006, Yogyakarta earthquake inserting the damage area distribution pattern. The probabilistic seismic hazard maps are finally developed by using the McGuire (1976) EQRISK computer program by modifying for the present purpose. The seismic hazard maps expressed in term of peak ground acceleration are developed for the recurrence intervals of 10, 50, 100, 200 and 500 years
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7249
Journal of Applied Geology; Vol 2, No 2 (2010)
eng
Copyright (c) 2015 Myo Thant, Subagyo Pramumijoyo, Heru Hendrayana, Hiroshi Kawase, Agus Darmawan Adi
oai:jurnal.ugm.ac.id:article/7250
2015-09-05T02:41:28Z
jag:ART
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"150905 2015 eng "
2502-2822
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dc
APPLICATION OF PFC 3D FOR SLOPE MOVEMENT ON COLLUVIAL SOIL
Tu, Nguyen Dinh
Aoki, Kenji
In the mountainous area of the tropics, soil creep often occurs on residual soil and colluvial deposit. The rate of this phenomenon varies from very slow to extremely slow and is difficult to detect without equipment as well as model. Within PFC3D (Particle Flow Code in three dimensions) granular materials such as soils are simulated by balls. And the PFC3D model was applied for colluvial soil creep. Although existing of some limitations, this application determined direction of creeping as well as zone of creeping of culluvial soil.
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7250
Journal of Applied Geology; Vol 2, No 2 (2010)
eng
Copyright (c) 2015 Nguyen Dinh Tu, Kenji Aoki
oai:jurnal.ugm.ac.id:article/7251
2015-09-05T02:44:37Z
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"150905 2015 eng "
2502-2822
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dc
PALEOSTRESS ANALYSIS TO INTERPRET THE LANDSLIDE MECHANISM: A CASE STUDY IN PARANGTRITIS, YOGYAKARTA
Husein, Salahuddin
Sudarno, Ignatius
Pramumijoyo, Subagyo
Karnawati, Dwikorita
Paleostress analysis on the landslide boundary faults is able to explain the sliding mechanism. This method is particularly useful to study a paleolandslide. About 30 striated fault planes from the Parangtritis paleo-landslide, located in the Yogyakarta coastline, were analyzed to define their principle stress axes. The eastern boundary fault, named as the Girijati Fault, was the main fault responsible for the mass movement and leaving a considerable steep cliff. It moved normal in a left lateral sense with ENE – WSW extension and dragged the rockmass southward, creating a NNW – SSW extension along the Parangtritis Fault and turn it into the western boundary fault. The rockmass slided along the stratigraphic contact between the underlying Nglanggran Formation and the overlying Wonosari Formation, created a semi-circular crown cliff as the northern boundary and produced some isolated topographic highs of the thrust block near the toe.
Keywords: Paleostress, landslide boundary, fault, paleolandslide
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7251
Journal of Applied Geology; Vol 2, No 2 (2010)
eng
Copyright (c) 2015 Salahuddin Husein, Ignatius Sudarno, Subagyo Pramumijoyo, Dwikorita Karnawati
oai:jurnal.ugm.ac.id:article/7252
2015-09-05T02:48:41Z
jag:ART
nmb a2200000Iu 4500
"150905 2015 eng "
2502-2822
2086-5104
dc
Engineering geology evaluation for predicting the collapse susceptibility of Sidoarjo hot mud earth levees: A hazard assessment
Eka Putra, Doni Prakasa
Juwarso, Juwarso
Karnawati, Dwikorita
Since May 29, 2006, a sea of hot mud has been gushing from the ground in Sidoarjo, East Java, 35 kilometres south of Indonesia’s second largest city, Surabaya. Due to this disaster, approximately thousand of peoples have been forced from their homes because 600 ha of land and villages were submerged, farmland was ruined, businesses and schools closed as the mud inundated the surrounding area. The authorities response was to build containment ‘basins’ or ‘ponds’ by enclosing areas of land within earth dams, or levees. During the heavy rain on the rainy season, the earth dams and ringdykes have overflown and broken regularly, causing the flooding of more land and damaging infrastructures. However, not only in the rainy season, the levees had also collapses during the dry season. Therefore, an engineering geology study was conducted in order to evaluate the geological factors which causes this phenomena. The parameters used for the evaluation are the heterogeniety of lithology under the dams, geological discontinuity which indicated by the occuring of surface cracks and bubbles, and subsidence phenomena which indicated by the vertical displacement. Overlying method was used to build homogeniety zone of engineering geology based on those parameters, and the resulted map was once again overlay with the location of dams collapses. Result of this evaluation shows that the earth dams collapses were highly correlated with the existing geological discontinuities and subsidences, respectively. Based on this study, the susceptible location of earth dams collapses can be predicted and allow engineers to prepare and plan better engineering solution for the high probable collapses points in order to protect land and infrastructures from the damaging hot mud overflown.
Keywords: Hot mud disaster, geological factors, homogeniety zone, earth levee failure points, Sidoarjo-Indonesia
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
https://jurnal.ugm.ac.id/jag/article/view/7252
Journal of Applied Geology; Vol 2, No 2 (2010)
eng
Copyright (c) 2015 Doni Prakasa Eka Putra, Juwarso Juwarso, Dwikorita Karnawati
oai:jurnal.ugm.ac.id:article/7253
2015-09-05T02:53:07Z
jag:ART
nmb a2200000Iu 4500
"150905 2015 eng "
2502-2822
2086-5104
dc
COPPER (Cu2+) REMOVAL FROM WATER USING NATURAL ZEOLITE FROM GEDANGSARI, GUNUNGKIDUL, YOGYAKARTA
Wilopo, Wahyu
Haryono, Septiawan Nur
Eka Putra, Doni Prakasa
Warmada, I Wayan
Hirajima, Tsuyoshi
Development of indusrialization and urbanization not only increase economic growth but also contribute to the environmental degradation, especially contamination of heavy metals in water. In other side, there are many geological materials have capability to immobilize heavy metals. Therefore, the objective of this research is to know the maximum capacity of natural zeolite from Trembono area, Gunung Kidul regency to immobilize copper (Cu2+) from water and to understand their mechanism. This experiment was carry out by a batch test. The result showed that the maximum capacity of zeolite to immobilize Cu (qmax) is 63,69 mmolCu/kg Zeolite according to Langmuir adsorption equilibrium model. In addition, the capability to immobilize Cu will increases due to decreasing the grain size. The result of this research can be used as an alternative for waste water treatment, especially Cu.
Keywords: Removal, copper (Cu2+), natural zeolite, Langmuir isotherm
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7253
Journal of Applied Geology; Vol 2, No 2 (2010)
eng
Copyright (c) 2015 Wahyu Wilopo, Septiawan Nur Haryono, Doni Prakasa Eka Putra, I Wayan Warmada, Tsuyoshi Hirajima
oai:jurnal.ugm.ac.id:article/7254
2015-09-05T02:59:18Z
jag:ART
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"150905 2015 eng "
2502-2822
2086-5104
dc
GROUNDWATER VULNERABILITY OF PANDAK AND BAMBANGLIPURO, YOGYAKARTA SPECIAL PROVINCE, INDONESIA
Snguon, Leakhena
Eka Putra, Doni Prakasa
Hendrayana, Heru
The study of intrinsic vulnerability of groundwater was generated in order to delineate groundwater protection zone in Pandak and Bambanglipuro, Indonesia, whose mainly water supply is from groundwater. Two methods of vulnerability mapping are chosen for the evaluation; DRASTIC method and Hoelting method. The resulted maps conducted from these method are validated using the actual contaminant concentration through the impact of on-site sanitation, for instance nitrate as it is proved to be very stable contaminants in groundwater. Considered in different hydrogeological setting, these two methods have produced various results at the certain site. However, its reliability has been drawn upon the nitrate concentration at the study areas.
Keywords: Intrinsic groundwater, vulnerability, DRASTIC, Hoelting methods, nitrate contamination
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7254
Journal of Applied Geology; Vol 2, No 2 (2010)
eng
Copyright (c) 2015 Leakhena Snguon, Doni Prakasa Eka Putra, Heru Hendrayana
oai:jurnal.ugm.ac.id:article/7255
2015-09-05T03:02:21Z
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nmb a2200000Iu 4500
"150905 2015 eng "
2502-2822
2086-5104
dc
THE IMPACT OF SANITATION ON GROUNDWATER NITRATE LEVEL IN BANTUL DISTRICT, BANTUL REGENCY, YOGYAKARTA SPECIAL PROVINCE, INDONESIA
Heng, Salpisey
Eka Putra, Doni Prakasa
Wilopo, Wahyu
Bantul is one district of Yogyakarta Special Province which residents mostly use on-site sanitation. On-site sanitation is well-known for hot-spot system of nitrate groundwater contamination. It is because the wide-practice of failure of on-site sanitation systems. Besides, the failure of on-site sanitation system, it will depend on the age of settlement, population density, sanitation arrangement and sanitation behavior including water use patterns. Because of this, nitrate has leaked to groundwater and polluted many supply wells surrounding the septic systems.
Since the repeated intake of nitrate could cause various acute and chronic effects to human health, especially the infant’s health under 3 months (blue baby syndrome), it is crucial to undertake the study of impact of sanitation on groundwater nitrate level in Bantul district to acquire a better understanding of the effect of settlement age, population density, sanitation arrangement and sanitation behavior on the concentration of nitrate in groundwater. In order to recognize or achieve the understanding of this issue, a methodology is conducted by observation directly to the field, including the measuring of groundwater table and the distance of septic tank to well, and also make the questionnaires for the mentioned parameters.
Finally, the result of each factors (Sanitation arrangement, Settlement age, House density) are shown a low relationship with nitrate concentration, although water use patterns does not. However, the combination of these three factors can show up to find out a better correlation than one factor with this nitrate concentration. Although it has a good relationship with nitrate concentration (average), the variation of nitrate concentration from high to low shows a low relationship. Therefore, the importance of groundwater vulnerability cannot be overlooked in explaining the variation in contaminant concentrations because the nitrate concentration in the groundwater does not only depend on contaminant loading but also groundwater vulnerability.
Keywords: Groundwater, on-site sanitation, nitrate concentration, contaminant loading
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7255
Journal of Applied Geology; Vol 2, No 2 (2010)
eng
Copyright (c) 2015 Salpisey Heng, Doni Prakasa Eka Putra, Wahyu Wilopo
oai:jurnal.ugm.ac.id:article/7256
2015-09-05T03:04:18Z
jag:ART
nmb a2200000Iu 4500
"150905 2015 eng "
2502-2822
2086-5104
dc
THE USE OF FORAMINIFERA FOSSILS FOR RECONSTRUCTING THE YOGYAKARTA GRABEN, YOGYAKARTA, INDONESIA
Barianto, Didit Hadi
Kuncoro, Pentatok
Watanabe, Koichiro
The Yogyakarta region is located in the southeastern part of Central Java, Indonesia. The region forms an elongated northeast – southwest-trending central depression bordered by two parallel faults in the west and east. These major faults divided the area into three parts, including the western, central and eastern parts. Herein, we investigate the relative uplift rate of the each part by using planktonic and benthonic foraminiferas. The foraminifera will show the initial position/datum of each part before uplift. Over sixty samples (primarily limestones and marls) were taken for this research. The uplift rates of each part were different and created a depressed block control by way of parallel faults. Based on foraminifera fossil observations, each block was in the same depositional environment (inner neritic) during N9. The present positions indicate that the western part was uplifted higher than the others, with this part being uplifted more than 590 meters. The central part was uplifted less than 120 meters, and the eastern part was uplifted above an altitude of 170-300 meters.
Keywords: Foraminifera fossil, planktonic, benthonic, graben, uplift
Geological Engineering Department Universitas Gadjah Mada
2015-07-12 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/7256
Journal of Applied Geology; Vol 2, No 2 (2010)
eng
Copyright (c) 2015 Didit Hadi Barianto, Pentatok Kuncoro, Koichiro Watanabe
oai:jurnal.ugm.ac.id:article/16917
2017-10-24T04:15:08Z
jag:ART
nmb a2200000Iu 4500
"150901 2015 eng "
2502-2822
2086-5104
dc
Characteristics Of Hydrothermal Alteration In Cijulang Area, West Java, Indonesia
Tun, Myo Min
Department of Geology, Mandalay University, Mandalay, Myanmar
Warmada, I Wayan
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Harijoko, Agung
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Al-Furqan, Reza
PT. Eksplorasi Nusa Jaya/Freeport-McMoran Copper & Gold
Watanabe, Koichiro
Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University
Characterization of hydrothermal alteration in the
Cijulang area (West Java, Indonesia) was carried
out using shortwave infrared spectroscopy. Hydrothermal alteration in the Cijulang area occurs in the calc-alkaline volcanic and volcaniclastic rocks. Shortwave infrared spectroscopic measurements of reflectance for altered rocks and minerals were carried out by ASD-FieldSpec and the laboratory spectra acquired were then analysed with “The Spectral Geologist” software program. Shortwave infrared spectroscopy is capable of detecting most finegrained alteration minerals from different hydrothermal alteration zones. Characteristic alteration minerals identified from the SWIR technique include pyrophyllite, alunite, kaolinite, dickite, illite, montmorillonite, polygorskite, gypsum, epidote, paragonite, and muscovite. Most of the spectra show mixture of
alteration minerals and only a few display pure spectra of single mineral. The crystallinity of kaolinite from the samples was also determined from the reflectance spectra and show moderately to high crystallinity. Alteration system of the Cijulang prospect
is similar to others documented high-sulfidation epithermal deposits, such as Rodalquilar (Spain), Summitville (Colorado), and Lepanto (Philippines). A characteristic alteration sequence and zonation of advanced argillic, argillic and propylitic alteration
outward from the silica core has resulted from the progressive cooling and neutralization of hot acidic magmatic fluid with the host rocks.
Keywords: Cijulang, High-sulfidation, Alteration minerals, Shortwave Infrared Spectroscopy
Geological Engineering Department Universitas Gadjah Mada
2015-08-28 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/16917
Journal of Applied Geology; Vol 7, No 1 (2015)
eng
Copyright (c) 2015 Myo Min Tun, I Wayan Warmada, Agung Harijoko, Reza Al-Furqan, Koichiro Watanabe
oai:jurnal.ugm.ac.id:article/16918
2018-01-15T03:02:10Z
jag:ART
nmb a2200000Iu 4500
"150601 2015 eng "
2502-2822
2086-5104
dc
Geochemical Fraction, Mobility And Bioavailability Of Lead In Unsaturated Soil Of Yogyakarta City, Indonesia
Zaw Aye, Saw Aung
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Hendrayana, Heru
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Eka Putra, Doni Prakasa
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Sato, Tsutomo
Laboratory of Environmental Geology, Faculty of Engineering, Hokkaido University
Lead (Pb) is one of common heavy metals found in
the soil of urban environment. In Yogyakarta City,
Indonesia, lead content in the soil was already reported by some researchers, however all of the report were only reveals the distribution of lead concentration in the soil. Therefore, this research paper aims to understand the geochemical fraction lead
in the soil of Yogyakarta City and assess the mobility and bioavailability of lead release to the environment. The soil sampling location is selected on Kotagede District, representing the oldest urban area of Yogyakarta city. A shallow bore hole was drill until about 7 m below the surface and soil/sediments were
sampled for each 1 m depth started from the surface. Six steps of sequential extraction procedures were carried out to assess the geochemical fraction of Pb for each of soil samples. The sequential extraction shows that the highest amount of Pb in the
soil of Yogyakarta City is found in amorphous iron
oxide, crystalline iron oxide and non residual fraction form of Pb. Based on the results of geochemical fraction, the mobility factor of lead can be calculated and reveals low mobility factor range from 0.4 to 3.3%. The mobility of lead is decreased from the surface to the deeper soil, on the other hand the bioavailability of Pb calculated from exchangeable and carbonate fraction is also show low risk of bioavailability. Therefore, it can be concluded that although Pb concentration is high in non-residual fraction, Pb is
in low risk condition due to its poor mobility and bioavailability. But, concern on lead contamination should be considered because if the concentration of Pb is enriched over the adsorption capacity of ironoxide, it can easily release to the environment and can impact to human in the future.
Keywords: Yogyakarta city, Lead, Sequential extraction, Geochemical fraction
Geological Engineering Department Universitas Gadjah Mada
2015-08-28 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/16918
Journal of Applied Geology; Vol 7, No 1 (2015)
eng
Copyright (c) 2015 Saw Aung Zaw Aye, Heru Hendrayana, Doni Prakasa Eka Putra, Tsutomo Sato
oai:jurnal.ugm.ac.id:article/16919
2020-02-20T03:32:46Z
jag:ART
nmb a2200000Iu 4500
"150601 2015 eng "
2502-2822
2086-5104
dc
Site Investigation For Construction Of Emergency Spillway At The Jatigede Dam
Indrawan, I Gde Budi
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Warman, Gusti Imam
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
An emergency spillway has been planned to be constructed at the Jatigede Dam, West Java, to allow floodwater to flow downstream and to prevent the capacity of the main spillway to be exceeded during large flood events. The complex geology of the
Jatigede Dam area, however, poses a challenge to determine the suitable location for the emergency spillway construction, either in the area to the west or to the east of the embankment dam. An engineering geological mapping and landslide susceptibility
zoning were conducted to determine the engineering
geological characteristics of the area surrounding the
Jatigede Dam. The site investigation showed that the
area to the west of the embankment dam tended to
have a lower slope inclination than the area to the
east of the embankment dam. Both areas to the west
and to the east of the embankment dam were found to
be composed of less erosion resistant rock units. The
existence of the earth retaining structures for slope
stabilization in the area to the east of the embankment dam will, however, likely limit the flexibility in developing the emergency spillway route. With respect to the existence of fault systems, both areas to the west and to the east of the embankment dam will likely be influenced by similar conditions. The area
to the west of the embankment dam tended to be less
susceptible to landslide as compared to the area to
the east of the embankment dam. The undeveloped
land use of the area to the west of the embankmen dam as compared to the area to the east of the embankment dam will provide more flexibility in construction of the emergency spillway. Due to the morefavorable engineering geological conditions, the area to the west of the embankment dam is proposed for
the location of the emergency spillway construction.
Keywords: Emergency spillway, Engineering geological mapping, Jatigede Dam
Geological Engineering Department Universitas Gadjah Mada
2015-08-28 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/16919
Journal of Applied Geology; Vol 7, No 1 (2015)
eng
Copyright (c) 2015 I Gde Budi Indrawan, Gusti Imam Warman
oai:jurnal.ugm.ac.id:article/26947
2018-01-15T00:50:17Z
jag:ART
nmb a2200000Iu 4500
"150726 2015 eng "
2502-2822
2086-5104
dc
DEPOSITIONAL MODEL OF NGRAYONG FORMATION IN MADURA AREA, NORTH EAST JAVA BASIN, INDONESIA
Htwe, Paike
Geology Department, Magway University, Magway, Myanmar
Surjono, Sugeng Sapto
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Amijaya, Donatus Hendra
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Sasaki, Kyuro
Department of Earth Resources Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan
Lithofacies, Depositional environment, Sandstone, Ngrayong Formation, Madura Island, North East Java Basin
The early Middle Miocene Ngrayong Formation, an important reservoir of North East Java Basin, is well exposed in the central anticlinal part of Madura Island. The purpose of current study is to classify the depositional environments of the study area based on the characteristics and geometry of sedimentary
facies. In the Madura island, the thicker clastics and deeper carbonates of Ngimbang Formation and Kujung Formation of Late Oligocene-Early Miocene deposited in the northeast-southwest asymmetrical half grabens. After the deposition of Kujung Formation, the basin morphology developed nearly eastwest trending shelf edge and the deposition of Tuban Formation began. The fine grained complex of Tuban Formation was followed by the Ngrayong Sandstones deposition. The depositional model of Ngrayong Formation is being producing of wide variety of depositional environments. Large scale cross-bedded sandstones and bioturbated massive sandstones with thin to medium bedded argillaceous limestone that outcrop in the northern part of the study area are deposited in costal environment. The heterolithic sandstone with planar and trough cross-lamination, fine grained sandstone with interlaminated structure and bioclastic carbonate exposed in the central part of the study area are deposited in upper shallow marine area. Dark grey siltstones and mudstones deposited in lower shallow marine area are well exposed in southern part of the study area. In conclusion, Ngrayong Formation in Madura area is developed in three depositional units which are coastal, upper shallow marine and lower shallow marine.
Geological Engineering Department Universitas Gadjah Mada
2016-12-02 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26947
Journal of Applied Geology; Vol 7, No 2 (2015)
eng
Copyright (c) 2015 Paike Htwe, Sugeng Sapto Surjono, Donatus Hendra Amijaya, Kyuro Sasaki
oai:jurnal.ugm.ac.id:article/26951
2017-07-26T08:32:46Z
jag:ART
nmb a2200000Iu 4500
"160726 2016 eng "
2502-2822
2086-5104
dc
Hydrothermal Alteration and Mineralization of the Randu Kuning Porphyry Cu-Au and Intermediate Sulphidation Epithermal Au-Base Metals Deposits in Selogiri, Central Java, Indonesia
Sutarto, Sutarto
Universitas Pembangunan Nasional "Veteran", Yogyakarta
Idrus, Arifudin
Universitas Gadjah Mada
Harijoko, Agung
Universitas Gadjah Mada
Setijadji, Lucas Donny
Universitas Gadjah Mada
Meyer, Franz Michael
RWTH Aachen University, Germany
Sindern, Sven
RWTH Aachen University, Germany
Putranto, Sapto
PT. Alexis Perdana Mineral
Hydrothermal alteration · Mineralization · Porphyry · Epithermal.
The Randu Kuning Porphyry Cu-Au prospect area is situated in the Selogiri district, Wonogiri regency, Central Java, Indonesia, about 40 km to the South-East from Solo city, or approximately 70 km east of Yogyakarta city. The Randu Kuning area and its vicinity is a part of the East Java Southern Mountain Zone, mostly occupied by both plutonic and volcanic igneous rocks, volcaniclastic, silisiclastic and carbonate rocks. Magmatism-volcanism products were indicated by the abundant of igneous and volcaniclastic rocks of Mandalika and Semilir Formation. The Alteration zones distribution are generally controlled by the NE–SW and NW–SE trending structures. At least eight types of hydrothermal alteration at the Randu Kuning area and its vicinity had been identified, i.e. magnetite + biotite ± K-feldspar ± chlorite (potassic), chlorite + sericite + magnetite ± actinolite, chlorite + magnetite ± actinolite ± carbonate (inner propylitic), chlorite + epidote ± carbonate (outer propylitic), sericite + quartz + pyrite (phyllic), illite + kaolinite ± smectite (intermediate argillic), illite + kaolinite ± pyrophyllite ± alunite (advanced argillic) and quatz + chlorite (sillisic) zones. The Randu Kuning mineralization at Selogiri is co existing with the porphyry Cu-Au and intermediate sulphidation epithermal Au-base metals. Mineralization in the porphyry environment is mostly associated with the present of quartz-sulphides veins including AB, C, carbonate-sulphides veins (D vein) as well as disseminated sulphides. While in the epithermal prospect, mineralization is particularly associated with pyrite + sphalerite + chalcopyrite + carbonate ± galena veins as well as hydrothermal breccias. The Randu Kuning porphyry prospect has copper gold grade in range at about 0.66–5.7 gr/t Au and 0.04–1.24 % Cu, whereas in the intermediate sulphidation epithermal contain around 0.1–20.8 gr/t Au, 1.2–28.1 gr/t Ag, 0.05–0.9 % Zn, 0.14–0.59 % Pb and 0.01–0.65 % Cu.
Geological Engineering Department Universitas Gadjah Mada
2017-07-26 15:32:46
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26951
Journal of Applied Geology; Vol 1, No 1 (2016)
eng
Copyright (c) 2016 Sutarto Sutarto, Arifudin Idrus, Agung Harijoko, Lucas Donny Setijadji, Franz Michael Meyer, Sven Sindern, Sapto Putranto
oai:jurnal.ugm.ac.id:article/26953
2017-07-26T08:32:46Z
jag:ART
nmb a2200000Iu 4500
"160726 2016 eng "
2502-2822
2086-5104
dc
Mineralogical and Geochemical Control of Altered Andesitic Tuff upon Debris Slide Occurences at Pelangan Area, Southern Mountain of Lombok Island, Indonesia
Winarti, Dwi
Department of Mining Engineering, Muhammadiyah Mataram University,
Karnawati, Dwikorita
Department of Geological Engineering, Gadjah Mada University
Hardiyatmo, Hary Christady
Department of Civil and Environmental Engineering, Gadjah Mada University
Srijono, Srijono
Department of Geological Engineering, Gadjah Mada University
Clay mineral · Shear strength · Hydrothermal alteration · Debris slide · Lombok Island · Indonesia.
Debris slides were recently found in the Pelangan area at Southern Mountain of Lombok Island, Indonesia. Pelangan is well known as the gold mineralization and hydrothermal alteration area. This study is aimed to identify the mineralogy and geochemistry of altered andesitic tuff that controlled slope instability and induced debris slides. For this purpose, it is necessary to prepare the field observation and laboratory analyses. Landslide inventory reveals that the Pelangan debris slides mostly occur in altered andesitic tuff. Based on the outcrop observations in the field, andesitic tuff found around the Pelangan debris slides have been altered in general. The strong intensity of alteration developed by hydrothermal alteration in this study area produces large amount of clay minerals especially montmorillonite, kaolinite, and illite. The abundance of those clay minerals reflect the intermediate argillic alteration. Montmorillonite is a type of clay mineral that easily swells at wet condition and easily shrinkages at dry condition. Swelling of clay mineral destroys intersheet and interlayer bonds, and reduces shear strength. The presence of clay minerals in the altered andesitic tuff of intermediate argillic zone can be considered as one of the factors that induced to the Pelangan debris slides. Further studies on geotechnical and slope stability analysis of the landslide area are crucial to be done for better understanding of the characteristics of the altered rocks inducing hazardous landslides.
Geological Engineering Department Universitas Gadjah Mada
2017-07-26 15:32:46
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26953
Journal of Applied Geology; Vol 1, No 1 (2016)
eng
Copyright (c) 2016 Dwi Winarti, Dwikorita Karnawati, Hary Christady Hardiyatmo, Srijono Srijono
oai:jurnal.ugm.ac.id:article/26956
2017-07-26T08:32:46Z
jag:ART
nmb a2200000Iu 4500
"160726 2016 eng "
2502-2822
2086-5104
dc
The Effect of Differences Leachate Concentration and Material Properties on Electrical Conductivity of Volcanic Deposits – Case Studies Piyungan Landfill Bantul Yogyakarta
Parhusip, Jaingot A.
Department of Mining Engineering, Faculty of Engineering, Cendrawasih University
Harijoko, Agung
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Eka Putra, Doni Prakasa
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Suryanto, Wiwit
Department of Geophysics, Faculty of Mathematics and Natural Sciences, Gadjah Mada University
Electrical conductivity · Cation exchange capacity · Leachate · Soil · Volcanic deposits.
Monitoring at the contaminated subsurface soil, have been conducted by using the geophysical surface method, especially for geoelectrical resistivity method. Monitoring is commonly conducted by using geoelectrical resistivity through measuring the value of Electrical Resistivity (ER) or Electrical Conductivity (EC) of leachate contaminated soil layer. EC measurement value of soil is affected by many factors, among others, particle conduction of soil materials, surface conduction, fluid conduction in the pores as well as the effect of particle shape and soil materials. Piyungan landfill is the main disposal site of Yogyakarta municipal solid waste. This landfill located mainly on the tertiary rocks of volcanic rocks and its weathering products. In order to improve the accuracy of geoelectrical measurements on resistivity in monitoring soil layers from contaminated leachate on this area, this research conducted several measurements on physical properties of soil sample and electrical properties of leachate in the saturated soil samples. The measurement of physical properties includes: porosity, clay content, particle content, and cation exchange capacity (CEC) value. The soil samples were collected from 3 locations around Piyungan Landfill. Type of soils are taken from the alluvial deposits (Sample B), weathered tuffaceous sandstone-claystone (Sample D), and weathered andesitic breccia (Sample F). Samples were made in containers, saturated with aquades-leachate solution with 12 different concentration levels. Electrical conductivity (EC) was measured by using Soil Box Miller and Geoelectric Resistivity Oyo McOhm. According to results of physical properties analysis, the grain size of soils are dominantly sandy clayey silt in grain size distribution, with clay content ranging from 33.0--38.4 %, the CEC values ranging from 26.8--52.7 meq/100 gr, and the porosity of samples B, D and F is 58.85 %, 55.30 %, 59.24 %, respectively. Based on the experiments with 12 different leachate concentrations, there is a linear increase in EC of 0.718mS/cm for every increase in electrical conductivity pore fluid (ECf ) 1 mg/l in samples B, while in samples D and F are 0.492 mS/cm and 0.284 mS/cm respectively. Plotting the data of EC vs ECf for each samples and ER vs ECf , it can be concluded the slope ofDEC/DECf differ for each samples and the electrical conductivity value of different concentration of leachate is very sensitive for alluvial deposits compare to the weathered tuffaceous sandstone-claystone and weathered volcanic breccia deposits.
Geological Engineering Department Universitas Gadjah Mada
2017-07-26 15:32:46
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26956
Journal of Applied Geology; Vol 1, No 1 (2016)
eng
Copyright (c) 2016 Jaingot A. Parhusip, Agung Harijoko, Doni Prakasa Eka Putra, Wiwit Suryanto
oai:jurnal.ugm.ac.id:article/26958
2017-07-26T08:32:46Z
jag:ART
nmb a2200000Iu 4500
"160726 2016 eng "
2502-2822
2086-5104
dc
Comparison of Grain-Size Profile and Depositional Process in Mandeh and Nyalo Bar, Mandeh Bay, West Sumatera, Indonesia
Hidayat, Rahmadi
Department of Geological Engineering, Gadjah Mada University
Rozamuri, Muhammad Fadli
Department of Geological Engineering, Gadjah Mada University
Mandeh Bay · Grain-size analysis · Depositional process · Shipwreck conservation · High energy.
Shipwreck of MV Boelongan Nederland situated in offshore of Mandeh Bay of West Sumatera is announced as potential area for tourism destination. Many studies were produced in term of its archeological and historical side but there is no significant work in sedimentological aspect. It is critical to understand depositional process of study area regarding the design of construction to minimize the impact of dynamic activity of waves within the area. Moreover, some areas along Mandeh Bay are covered by Cubadak Island as a protection for wave action derived from Indian Ocean that can produce more complexity in depositional process and will reflect to its characteristic of grain-size profiles. Utilizing thirteen sediment samples in two areas that correspond to inside (Mandeh Bar) and outside (Nyalo Bar) coverage of Cubadak Island, this study attempted to compare and contrast both grain-size profiles as well as interpretation of depositional process based on well-known analysis such as bivariate scatter plots, Linear Discriminant Function plot (LDF), Log probability curves and C-M diagram. Result of this study can be integrated by other researches to gain better policy in maintaining the shipwreck conservation. High energy of Indian Ocean wave supported by strong current clearly dominated depositional process in Nyalo Bar with coarser grain-size; good sortation, lower Y2 of LDF plot; extremely high population of traction materials and lower range of C-M. By contrast, presence of Cubadak Island disrupted the wave effectively and created lower and fluctuated energy in Mandeh Bar. This phenomenon was clearly depicted in its characteristic of finer grain-size with higher Y2 value; high abundance of saltation materials and greater ratio of C-M value.
Geological Engineering Department Universitas Gadjah Mada
2017-07-26 15:32:46
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26958
Journal of Applied Geology; Vol 1, No 1 (2016)
eng
Copyright (c) 2016 Rahmadi Hidayat, Muhammad Fadli Rozamuri
oai:jurnal.ugm.ac.id:article/26959
2017-07-26T08:32:46Z
jag:ART
nmb a2200000Iu 4500
"160726 2016 eng "
2502-2822
2086-5104
dc
Petrophysics Analysis for Reservoir Characterization of Upper Plover Formation in the Field “A”, Bonaparte Basin, Offshore Timor, Maluku, Indonesia
Surjono, Sugeng Sapto
Department of Geological Engineering, Gadjah Mada University
Arifianto, Indra
Department of Geological Engineering, Gadjah Mada University
Upper Plover Formation · Rock typing · Depositional environment · Bonaparte basin · Maluku · Indonesia.
Hydrocarbon potential within Upper Plover Formation in the Field “A” has not been produced due to unclear in understanding of reservoir problem. This formation consists of heterogeneous reservoir rock with their own physical characteristics. Reservoir characterization has been done by applying rock typing (RT) method utilizing wireline logs data to obtain reservoir properties including clay volume, porosity, water saturation, and permeability. Rock types are classified on the basis of porosity and permeability distribution from routines core analysis (RCAL) data. Meanwhile, conventional core data is utilized to depositional environment interpretations. This study also applied neural network methods to rock types analyze for intervals reservoir without core data. The Upper Plover Formation in the study area indicates potential reservoir distributes into 7 parasequences. Their were deposited during transgressive systems in coastal environments (foreshore - offshore) with coarsening upward pattern during Middle to Late Jurassic. The porosity of reservoir ranges from 1–19 % and permeability varies from 0.01 mD to 1300 mD. Based on the facies association and its physical properties from rock typing analysis, the reservoir within Upper Plover Formation can be grouped into 4 reservoir class: Class A (Excellent), Class B (Good), Class C (Poor), and Class D (Very Poor). For further analysis, only class A-C are considered as potential reservoir, and the remain is neglected.
Geological Engineering Department Universitas Gadjah Mada
2017-07-26 15:32:46
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26959
Journal of Applied Geology; Vol 1, No 1 (2016)
eng
Copyright (c) 2016 Sugeng Sapto Surjono, Indra Arifianto
oai:jurnal.ugm.ac.id:article/26961
2017-11-30T03:58:40Z
jag:ART
nmb a2200000Iu 4500
"160726 2016 eng "
2502-2822
2086-5104
dc
Geochemistry, Hydrothermal alteration and Ore mineralogy of Skarn Mineralization at Wethey-Pheshey area, Thabeikkyin Township, Mandalay Region, Myanmar
Naing Oo, Toe
Department of Geology, Dagon University, Yangon, Myanmar
Setijadji, Lucas Donny
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Warmada, I Wayan
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Oo, Than Than
Department of Geology, Dagon University, Yangon, Myanmar
Wethey-Pheshey area · Skarn · Mineralization · Hydrotermal alteration · Geochemistry · Myanmar.
Wethey-Pheshy area is located 80 km north of Mandalay at Thabeikkyin Township, Mandalay Region. X-ray Diffraction (XRD) Analysis and Inductively Coupled Plasma Mass Spectrometry (ICP-MS) were applied in this study. Geochemical studies on the host rocks indicate that major and minor oxides compositions of metamorphicrocks show some degree of variation. CaO, MgO, FeO, TiO2 and P2O5 concentration of the metamorphic rock samples show a coherent negative correlation with SiO2 whereas Na2O is positively correlated with SiO2. The metamorphic rocks are strongly enriched in light rare earth elements (LREE) and relatively depleted in heavy rare earth element (HREE). The depleted Eu-nomalies in the chondrite-normalized REE diagrams indicate a plagioclase-depleted Eu crustal source or fractionation during magmatic differentiation. Intrusion of granitic rocks in the diopside marble caused the base metal ore mineralization and associated skarn alterations. Granite shows the sub-alkaline nature and peraluminous character. It is identified as I-type granite (magnetite series) developed in the volcanic arc setting. Hydrothermal alteration types associated with gold and skarn mineralization in the study area include calc-silicate alteration, propylitization, sericitization (argillitization) and hematization. Based on the nature and characteristics of host rocks, mineralization and alteration style and geochemical characteristics in the study area is identified as intrusion-related skarn mineralization. Common ore minerals include chalcopyrite, galena, sphalerite, pyrite, gold and Fe-oxides.
Geological Engineering Department Universitas Gadjah Mada
2017-07-26 15:58:11
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26961
Journal of Applied Geology; Vol 1, No 2 (2016)
eng
Copyright (c) 2016 Toe Naing Oo, Lucas Donny Setijadji, I Wayan Warmada, Than Than Oo
oai:jurnal.ugm.ac.id:article/26962
2017-11-30T03:58:40Z
jag:ART
nmb a2200000Iu 4500
"160726 2016 eng "
2502-2822
2086-5104
dc
Occurrences and Characteristics of Gold Mineralization in Rampi Block Prospect, North Luwu Regency, South Sulawesi Province, Indonesia
Idrus, Arifudin
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Mansur, Suaib
Mining and Energy Agency, North Luwu District, South Sulawesi Province
Ahmad, Ahmad
Mining and Energy Agency, North Luwu District, South Sulawesi Province
Rahmayuddin, Rahmayuddin
Mining and Energy Agency, North Luwu District, South Sulawesi Province
Abdul, Abdul
Mining and Energy Agency, North Luwu District, South Sulawesi Province
Gold · Orogenic/mesothermal · Rampi block prospect · North Luwu · Sulawesi · Indonesia.
This study is aimed to identify the occurences, characterisatics and genetic type of gold mineralization, and to elucidate the preliminary gold potential in the study area. Research method includes field observation of prospect geology, hydrothermal alteration and ore mineralization. Laboratory analysis consists of petrography, ore microscopy and ore chemistry. Geologically, quartz ± gold veins were found in Rampi block prospect, which are mainly hosted by metamorphic and metasediment rocks. The quartz veins has structurally segmented with massive, brecciated and laminated textures. Orientation and distribution of veins is controlled by NW–SE and NE–SW trending structures. Sulfides are present with minor abundance (<1 %). Pyrite is obviously observed and partially oxidized. Arsenopyrite and stibnite are minor, while basemetal (Pb, Zn) sulfides are very rare. Gold mineralization occurred in quartz veins and closely related to silica-clay and silicic alteration. Gold grade varies from 0.1 to 11 ppm Au (29 samples). Quartz veins contained high gold grade (>9 ppm) commonly show laminated and brecciated texture and has been undergone a supergene enrichment. According to several characteristics above, gold deposit in Rampi block prospect tends to meet the criteria of orogenic/mesothermal gold type (cf. Groves et al., 2003). The deposit shares similarities with Awak Mas prospect, which is already confirmed to be a mesothermal type in Luwu district (cf. Querubin and Walters, 2011). Therefore, discoveries of economic mesothermal gold deposits are still open in the metamorphic terrains, and thus, it requires a systematic exploration based on the genetic model of the deposit.
Geological Engineering Department Universitas Gadjah Mada
2017-07-26 15:58:11
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26962
Journal of Applied Geology; Vol 1, No 2 (2016)
eng
Copyright (c) 2016 Arifudin Idrus, Suaib Mansur, Ahmad Ahmad, Rahmayuddin Rahmayuddin, Abdul Abdul
oai:jurnal.ugm.ac.id:article/26963
2017-11-30T03:58:40Z
jag:ART
nmb a2200000Iu 4500
"160726 2016 eng "
2502-2822
2086-5104
dc
The Effectiveness of Wenner-Schlumberger and Dipole-dipole Array of 2D Geoelectrical Survey to Detect The Occurring of Groundwater in the Gunung Kidul Karst Aquifer System, Yogyakarta, Indonesia
Eka Putra, Doni Prakasa
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Hermawan, Oktanius Richard
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
2D geoelectrical survey · Wenner-Schlumberger method · Dipole-dipole method · Karst aquifer · Gunung Kidul · Indonesia.
Until today, geoelectrical survey is the most effective method for groundwater exploration. 2D method or known as horizontal profiling is now the most appropriate method in the geoelectrical survey compare to vertical electrical sounding method. The 2D method of Wenner-Schlumberger and Dipole-dipole configuration proved to be very effective to locate conventional aquifer occurrence on volcanic terrain or sedimentary terrain. Karst aquifer system is an unconventional aquifer and acts very differ in contrast with the conventional sedimentary aquifer. Heterogeneity and discontinuity of limestones in karst terrain will reveal a wide variety of resistivities, hence it is difficult to interpret. This research has important objective to define the effectiveness of the Wenner-Schlumberger and Dipole-dipole configuration in the 2D geoelectrical survey to explore groundwater in the karst area. Field observation of geology and 2D geoelectrical survey were conducted in underground river of Kali Suci Area, Gunung Kidul. In Kali Suci where an endokarst cave was occured on the surface, line survey was placed in the top of the cave and across the geometry of the cave. Measured stratigraphy in the wall of the cave found four types of limestone which consist of packstone, wackestone, grainstone and crystalline limestone. The Wenner-Schlumberger and Dipole-dipole method can detect differentiation of limestone types and also the exposed underground river successfully. However, compared to Wenner-Schlumberger array, Dipole-dipole array reveals less vertical accuration.. Therefore, on this research, the best method to detect water saturated zone or gourndwater in the karst system is the Wenner-Schlumberger method.
Geological Engineering Department Universitas Gadjah Mada
2017-07-26 15:58:11
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26963
Journal of Applied Geology; Vol 1, No 2 (2016)
eng
Copyright (c) 2016 Doni Prakasa Eka Putra, Oktanius Richard Hermawan
oai:jurnal.ugm.ac.id:article/26964
2017-11-30T03:58:40Z
jag:ART
nmb a2200000Iu 4500
"160726 2016 eng "
2502-2822
2086-5104
dc
Lithofacies and Sedimentation of Organic Matter in Fine Grained Rocks of Nanggulan Formation in Kulon Progo, Yogyakarta
Amijaya, Donatus Hendra
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Adibah, Najibatul
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Ansory, Ahmad Z.A.
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Fine-grained rock · Lithofacies · Organic matter · Nanggulan Formation · Kulon Progo
Fine grained rocks especially shale play a significant role in shale hydrocarbon system. Research on Eocene Nanggulan shale becomes an interest lately since this shale is considered as prospective interval for shale gas source. It potentially contains significant organic matter because coaly sediment is found in this formation as well. Nanggulan Formation fine grained rocks was deposited in various depositional environment from estuary – shallow marine. This paper integrates the result of lithofacies and depositional environment analysis with organic geochemical data to understand the sedimentation process of organic matter. Samples were taken from cores. The result of 14 geochemically analysed samples shows Total Organic Carbon (TOC) content between 0.36–1.00 % for fin e grained rocks (shales) and 12.80 % for coaly shales. Nine samples are categorized as fair and 2 samples are categorized as good source rock. The depositional environment of Nanggulan Formation sediment, which was shallow marine at Late Eocene and estuary (salt marsh) at Early Eocene, produced sediment with higher TOC. Whereas the deposition of sediment in estuary (tidal flat) at Middle Eocene produced lower content of TOC. Vulcanic activity at Middle Eocene also caused less organic material preservation because it produced abundant inorganic material.
Geological Engineering Department Universitas Gadjah Mada
2017-07-26 15:58:11
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26964
Journal of Applied Geology; Vol 1, No 2 (2016)
eng
Copyright (c) 2016 Donatus Hendra Amijaya, Najibatul Adibah, Ahmad Z.A. Ansory
oai:jurnal.ugm.ac.id:article/26978
2018-01-15T03:05:00Z
jag:ART
nmb a2200000Iu 4500
"150727 2015 eng "
2502-2822
2086-5104
dc
MINERALOGY, GEOCHEMISTRY, AND SEQUENTIAL EXTRACTION EXPERIMENT OF REE IN WEATHERED ANGGI GRANITE, MANOKWARI REGENCY, WEST PAPUA, INDONESIA
Prasastia, Ega Gita
Department of Geological Engineering, Gadjah Mada University,
Setijadji, Lucas Donny
Department of Geological Engineering, Gadjah Mada University,
Warmada, I Wayan
Department of Geological Engineering, Gadjah Mada University,
Anggi Granite, REE, Weathering, Sequential extraction experiment, Geochemical fraction
This research objective is to identify geochemical and
mineralogical characteristics of Rare earth elements
(REE) in the weathering products of Anggi Granite, which is located in Manokwari Regency, West
Papua, Indonesia. The research is conducted on 7
samples of fresh rocks and 7 samples of weathered
rocks of Anggi Granite. The research analysis consists of petrography, XRD, XRF, and sequential extraction experiment, supported by secondary data
and references. Anggi Granite is S-type and peraluminous granite that contains zircon, monazite and
apatite as a rare earth bearing minerals. Weathering products of Anggi Granite do not have a significant enrichment of REE, even some of the samples
are depleted in REE. REE in weathered Anggi Granite are dominantly present in the primary minerals,
mostly in zircon and monazite. Extractable form
of geochemical fractions include crystalline Fe-oxide
occluded fraction (ilmenite, hematite and goethite),
and ion-exchangeable (illite, kaolin and chlorite).
Enrichment of REE in the weathered Anggi Granite is influenced by the presence of resistant REEbearing minerals, in the forms of zircon and monazite, degree of weathering related to the presence
of secondary minerals, and other factors such as pH
and Eh
Geological Engineering Department Universitas Gadjah Mada
2015-08-28 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26978
Journal of Applied Geology; Vol 7, No 1 (2015)
eng
Copyright (c) 2015 Ega Gita Prasastia, Lucas Donny Setijadji, I Wayan Warmada
oai:jurnal.ugm.ac.id:article/26979
2018-01-15T03:04:06Z
jag:ART
nmb a2200000Iu 4500
"150727 2015 eng "
2502-2822
2086-5104
dc
DETERMINATION OF NUCLEAR POWER PLANT SITE IN WEST BANGKA BASED ON ROCK MASS RATING AND GEOLOGICAL STRENGTH INDEX
Irvani, Irvani
Department of Geological Engineering, Gadjah Mada University,
Wilopo, Wahyu
Department of Geological Engineering, Gadjah Mada University,
Karnawati, Dwikorita
Department of Geological Engineering, Gadjah Mada University,
nuclear power plant foundation, Geological Strength Index, Rock Mass Rating, rock mass quality
Indonesian government through the National
Atomic Energy Agency has planned to build a
nuclear power plant. One of the proposed sites
is in West Bangka Regency, Bangka Belitung
Archipelago Province. The engineering geology
of this area is, however, not fully understood and
requires further investigations. Engineering geology investigations were carried out by assessing the
rock mass quality and bearing capacity based on
field observation and drilling data. The assessment
was conducted using Rock Mass Rating (RMR)
and Geological Strength Index (GSI) classifications.
The rock masses in the study area were divided
into four units, namely units of sandstone, granite,
mudstone and pebbly sandstone. The RMR and
GSI values in the study area were influenced by the
parameters of discontinuity space density, the slope
of discontinuity orientation, grade of weathering
and groundwater conditions. The assessment shows
that the granite unit had the best quality which was
shown by a 53 average RMR value and 66 GSI
value. Based on the average RMR value, the granite
unit was estimated to have cohesion value between
0.2 and 0.3 MPa, friction angle between 25° and
35°, and allowable bearing pressure between 280
and 135 T/m2. Based on the GSI value, the granite
unit was estimated to have uniaxial compressive
strength value between 1.0465 and 183.8 MPa, ten-sile strength between (-0.0122) and (-5.2625) MPa,
rock mass strength values between 24.5244 and
220.351 MPa, and modulus of deformation within
a range of 1.73 - 86.68 GPa. The Granite Unit was
considered to be the most appropriate location for
the nuclear power plants.
Geological Engineering Department Universitas Gadjah Mada
2015-08-28 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26979
Journal of Applied Geology; Vol 7, No 1 (2015)
eng
Copyright (c) 2015 Irvani Irvani, Wahyu Wilopo, Dwikorita Karnawati
oai:jurnal.ugm.ac.id:article/26980
2018-01-15T02:33:01Z
jag:ART
nmb a2200000Iu 4500
"150727 2015 eng "
2502-2822
2086-5104
dc
MINERAL POTENTIAL MAPPING USING GEOGRAPHIC INFORMATION SYSTEMS (GIS) FOR GOLD MINERALIZATION IN WEST JAVA, INDONESIA
Sirisokha, Seang
Geo-resources and Geotechnical Engineering, Institute of Technology of Cambodia
Setijadji, Lucas Donny
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Warmada, I Wayan
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
GIS, Weight of evidence method, Mineral potential mapping, Bayah Dome, Bogor, West Java
Western Java is a part of the Sunda Banda magmatic belt. This belt is well known to be host for several gold deposits in Indonesia, the distribution of 107 Au occurrences in this area was examined in terms of spatial association with various geological phenomena. The goal of this project is to use GIS to conduct weights of evidence (WofE) model for gold mineralization in West Java, Indonesia. A Geographic Information System (GIS) is a computer system for capturing, storing, querying, analyzing, and displaying geospatial data and weight of evidence method is one of the most important datadriven methods for mapping in GIS. The method is a probability based on technique for mapping mineral potential using the spatial distribution of known mineral occurrences. Therefore this method is very useful for gold potential mapping. There are six evidences maps such as NE–SW lineaments NW–SE Lineament, host rocks, heat sources, clay alteration and limonitic alteration, have been combined using a weights of evidence model to predict gold potential in West Java. The best predictive map generated by this method defines 21.62% (9902 km) of study area as favourable zones for gold mineralization further exploration work. It predicts correctly 74 (92.5%) of the 80 model deposits and predicts correctly 26 (96.35%) of the 27 validation deposits, has 6 main 2 prospective target for future exploration are located in Bayah Dome, southern mountain, Honjie Igneous Complex and Bogor zone, Purwakarta. Bayah Dome is highest potential area for gold deposit like Gunung Pongor, Cikidang, Cirotan, Ciawitali, Cikotok destricts and other deposits. The potential area of Au occurrences in research area is associated with NE–SW and NW–SE structure/ lineaments, dominated surrounding the Tertiary intrusive rock unit and hosted in Miocene to Pleistocene lithology rock unit.
Geological Engineering Department Universitas Gadjah Mada
2016-12-02 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26980
Journal of Applied Geology; Vol 7, No 2 (2015)
eng
Copyright (c) 2015 Seang Sirisokha, Lucas Donny Setijadji, I Wayan Warmada
oai:jurnal.ugm.ac.id:article/26981
2018-01-15T02:47:41Z
jag:ART
nmb a2200000Iu 4500
"150727 2015 eng "
2502-2822
2086-5104
dc
GEOLOGY AND ORE MINERALISATION OF NEOGENE SEDIMENTARY ROCK HOSTED LS EPITHERMAL GOLD DEPOSIT AT PANINGKABAN, BANYUMAS REGENCY, CENTRAL JAVA, INDONESIA
Idrus, Arifudin
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Hakim, Fahmi
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Warmada, I Wayan
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Aziz, Mochammad
Department of Geological Engineering, Jenderal Soedirman University
Kolb, Jochen
Geological Survey of Denmark & Greenland
Meyer, Franz Michael
RWTH Aachen University, Germany
Geology, Ore mineralization, Hydrothermal alteration, LS epithermal, Paningkaban area, Indonesia.
Low suphidation (LS) epithermal gold deposits were recently found in the Paningkaban area, Central Java province, Indonesia, with more than five hundred artisanal gold miners currently operating in the area. This study is aimed to understand the geological factors controlling the gold mineralization and to characterize the alteration and ore mineralogy of the deposit. Several epithermal veins/veinlets trending N–S, NW–SE, and NE–SW are hosted by Tertiary turbiditic volcanoclastic sedimentary rocks of the Halang formation. This formation is composed of looping gradation of sandstone and siltstone units. Pre- and syn-mineralization structures such as extension joints, normal sinitral fault and sinitral fault control the gold mineralization. Fault movements formed dilational jogs manifested by NW-SE-trending en-echelon tension gash veins. Four main alteration zones are identified: (a) phyllic, (b) argillic, (c) sub propylitic and (d) weak subpropylitic. Ore minerals consist of native gold, electrum, native silver, pyrite, chalcopyrite, sphalerite, galena, arsenopyrite, cubanite, marcasite, covellite and tennantite, which are commonly associated withargillic alteration. Vein structures such as massive, swarm and low angle veins, stockwork and veins dispersed in diatreme breccia are present. Normal banded, cockade, crustiform, bladed carbonates as well as, comb and saccharoidal features are the typical vein textures. It is noteworthy that the veins are basically composed of carbonate with minor quartz at gold grades of up to 83 g/t Au. Based on the vein structures and textures, four stages of ore mineralization were developed consisting of (a) early stage (fluidized breccia and quartz vein), (b) middle stage (carbonate base metal), (c) late stage (late carbonate), and supergene stage. Gold mineralization originated mainly during middle and late stages, particularly in association with cockade, crustiform, bladed carbonate base metal veins. Based on those various features, the LS epithermal deposit in the study area is categorized as carbonate-base metalgold mineralization type.
Geological Engineering Department Universitas Gadjah Mada
2016-12-02 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26981
Journal of Applied Geology; Vol 7, No 2 (2015)
eng
Copyright (c) 2015 Arifudin Idrus, Fahmi Hakim, I Wayan Warmada, Mochammad Aziz, Jochen Kolb, Franz Michael Meyer
oai:jurnal.ugm.ac.id:article/26982
2018-01-15T02:51:33Z
jag:ART
nmb a2200000Iu 4500
"150727 2015 eng "
2502-2822
2086-5104
dc
VEINS AND HYDROTHERMAL BRECCIAS OF THE RANDU KUNING PORPHYRY Cu-Au AND EPITHERMAL Au DEPOSITS AT SELOGIRI AREA, CENTRAL JAVA INDONESIA
Sutarto, Sutarto
Universitas Pembangunan Nasional ”Veteran
Idrus, Arifudin
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Harijoko, Agung
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Setijadji, Lucas Donny
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Meyer, Franz Michael
RWTH Aachen University, Germany
Veins, Hydrothermal breccia, Porphyry, Epithermal
The Randu Kuning prospect is situated at Selogiri area, Wonogiri, Central Java, Indonesia. This location is about 40 km to the south-east from Solo city or approximately 70 km east of Yogyakarta city. Many Tertiary dioritic rocks related alterationmineralisation were found at the Randu Kuning area and its vicinity, including hornblende microdiorite, hornblende-pyroxene diorite and quartz diorite. Mineralisation type of the Randu Kuning prospect was interpreted as porphyry Cu-Au and a number epithermal Au-base metals deposits in its surrounding. The closed existing of porphyry Cu-Au and epithermal Au-base metals type deposits at the Randu Kuning area produced a very complex of veins and hydrothermal breccias crosscutting relationship. A lot of porphyry veins types were found and observed at the Randu Kuning area, and classified into at least seven types. Most of the porphyry veins were cross cut by epithermal type veins. Many epithermal veins also are found and crosscut into deeply porphyry vein types. There are genetically at least two type of hydrothermal breccias have recognized in the research area, i.e. magmatic-hydrothermal breccia and phreatomagmatic breccia. Magmatic hydrothermal breccias are mostly occured in contact between hornblende microdiorite or quartz diorite and hornblende-pyroxene diorite, characterized by angular fragments/clasts supported or infilled by silicas, carbonates and sulphides matrix derived from hydrothermal fluids precipitation. Phreatomagmatic breccias are characterized by abundant of the juvenile clasts, indicated contact between hot magma with fluid or water as well as many wall rock fragments such as altered diorites and volcaniclastic rock clasts set in clastical matrix. The juvenile clasts usually compossed by volcanic glasses and aphanitic rocks in rounded-irregular shape. Both veining and brecciation processes have an important role in gold and copper mineralisation of the Randu Kuning Porphyry Cu-Au and epithermal Au-base metals deposits, mostly related to the presence of quartz veins/veinlets containing significant sulphides, i.e., quartz with thin centre line sulphides (Abtype) veins, pyrite±chalcopyrite (C type) veinlets, pyrite+quartz± chalcopyrire±carbonate (D type) veins of porphyry types as well as epithermal environment quarts+ sulphides+carbonate veins.
Geological Engineering Department Universitas Gadjah Mada
2016-12-02 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26982
Journal of Applied Geology; Vol 7, No 2 (2015)
eng
Copyright (c) 2015 Sutarto Sutarto, Arifudin Idrus, Agung Harijoko, Lucas Donny Setijadji, Franz Michael Meyer
oai:jurnal.ugm.ac.id:article/26983
2018-01-15T02:52:53Z
jag:ART
nmb a2200000Iu 4500
"150727 2015 eng "
2502-2822
2086-5104
dc
NUMERICAL MODELLING AND SIMULATION OF CO2 –ENHANCED COAL-BED METHANE RECOVERY (CO2-ECBMR): THE EFFECT OF COAL SWELLING ON GAS PRODUCTION PERFORMANCE
Anggara, Ferian
Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
Sasaki, Kyuro
Department of Earth Resources Engineering, Kyushu University, Fukuoka 819-0395 Japan
Sugai, Yuichi
Department of Earth Resources Engineering, Kyushu University, Fukuoka 819-0395 Japan
Coal swelling in CO2, Permeability, Low rank coal, CO2-ECBMR
This presents study investigate the effect of swelling on gas production performances at coal reservoirs during CO2-ECBMR processes. The stressdependent permeability-models to express effect of coal matrix shrinkage/swelling using Palmer and Mansoori (P&M) and Shi and Durucan (S&D) models were constructed based on present experimental results for typical coal reservoirs with the distance of 400 to 800 m between injection and production wells. By applying the P&M and S&D models, the numerical simulation results showed that CH4 production rate was decreasing and peak production time was delayed due to effect of stress and permeability changes caused by coal matrix swelling. The total CH4 production ratio of swelling effect/no-swelling was simulated as 0.18 to 0.95 for permeability 1 to 100 mD, respectively. It has been cleared that swelling affects gas production at permeability 1 to 15 mD, however, it can be negligible at permeability over 15 mD.
Geological Engineering Department Universitas Gadjah Mada
2016-12-02 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/26983
Journal of Applied Geology; Vol 7, No 2 (2015)
eng
Copyright (c) 2015 Ferian Anggara, Kyuro Sasaki, Yuichi Sugai
oai:jurnal.ugm.ac.id:article/27584
2017-11-30T03:58:40Z
jag:ART
nmb a2200000Iu 4500
"170818 2017 eng "
2502-2822
2086-5104
dc
Groundwater Level Changes in Shallow Aquifer of Yogyakarta City, Indonesia: Distribution and Causes
Eka Putra, Doni Prakasa
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Atmaja, Rilo Restu Surya
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Manny, Liliane
Department of Engineering Geology and Hydrogeology, RWTH Aachen, Germany
Groundwater level changes _ Urban recharge _ Sewers leakage _ Yogyakarta City _ Indonesia
The population in Yogyakarta City, Indonesia has increased since 1970, resulting in high groundwater utilization. This normally results in a decline of groundwater level in shallow aquifer beneath the city. However, expansion of the city and urbanization effects can also have the opposite effect and lead to a rise of groundwater levels due to urban recharge. This study investigates groundwater level changes in Yogyakarta City during a time period of 30 years between 1985 and 2015. Collected data in this research are groundwater level, rainfall, population density, sewer system, and land use. Overlaying various spatial information reveals a pattern of groundwater level rise in some areas of the city by 0–12 m, whilst in other areas a decline of 0–9 m is discovered. Rising groundwater levels are mainly found in areas moderate to high population density where sewer system networks have been installed. The rising of groundwater levels is this expected to be caused by urban recharge and sewers leakage.
Geological Engineering Department Universitas Gadjah Mada
2017-07-26 15:58:11
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/27584
Journal of Applied Geology; Vol 1, No 2 (2016)
eng
Copyright (c) 2017 Doni Prakasa Eka Putra, Rilo Restu Surya Atmaja, Liliane Manny
oai:jurnal.ugm.ac.id:article/30253
2018-11-14T03:04:51Z
jag:ART
nmb a2200000Iu 4500
"171113 2017 eng "
2502-2822
2086-5104
dc
Variation of Slab Component in Ancient and Modern Merapi Products: A Detailed Look into Slab Derived Fluid Fluctuation over the Living Span of One of the Most Active Volcanoes in Sunda Arc
Handini, Esti
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Hasenaka, Toshiaki
Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto-shi, 860-8555, Japan
Harijoko, Agung
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Mori, Yasushi
Kumamoto University, 2-39-1 Kurokami, Chuo-ku, Kumamoto-shi, 860-8555, Japan
Boron Slab component Slab derived fluid contribution Ancient and Modern Merapi Sunda arc
Holocene eruptions of Merapi have produced both medium-K and high-K calc alkaline series which correspond to products older and younger than 1900 years respectively. The change has been attributed to increasing sediment input as the volcano matures. This study presents two Merapi samples which represent Ancient and Modern Merapi. The two samples are analyzed for subduction components including B, Ba, Sr, and Pb using X-ray fluorescence (XRF) spectrometer and prompt gamma ray analysis (PGA). Our finding shows that Ancient Merapi sample from Plawangan Hill lava is close in affinities with younger than 1900 years high-K magma series. On the other hand, Modern Merapi sample from 2006 eruption juvenile is plotted within medium-K magma series which are observed in eruption products older than 1900 years. Ratios of fluid mobile elements to high field strength element (HFSE) (i.e. B/Nb, Ba/Y, Pb/Nb) consistently show that Ancient Merapi sample has higher input of slab derived fluid than Modern Merapi sample. A model using B/Nb and Ba/Nb suggests that Plawangan magma requires 1.5 % of sediment derived fluid, higher than estimated in 2006 eruption magma (1.2 %) and medium-K series magma, and within the range of high-K series magma, to explain its slab component enrichment. This evidence suggests that slab derived component addition to the sub-arc mantle wedge highly fluctuates over short period of evolution of a volcano. One possible explanation is the presence of veined hydrous metasomatized sub-arc mantle as Merapi magma source which allows melting of different mantle area to produce fluctuation of slab components in the course of evolution of Merapi magmas.
Geological Engineering Department Universitas Gadjah Mada
2017-11-13 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/30253
Journal of Applied Geology; Vol 2, No 1 (2017)
eng
Copyright (c) 2017 Esti Handini, Toshiaki Hasenaka, Agung Harijoko, Yasushi Mori
oai:jurnal.ugm.ac.id:article/30254
2018-11-14T03:04:51Z
jag:ART
nmb a2200000Iu 4500
"171113 2017 eng "
2502-2822
2086-5104
dc
Engineering Geology of Sidosari Area, Magelang, Central Java, Indonesia
Indrawan, I Gde Budi
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Ratri, Diyaning
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Engineering geological mapping Landslide susceptibility Soil creeping Indonesia
Development of settlement area in Sidosari area and the surroundings requires complete understanding of the engineering geological conditions, including susceptibility to landslides, to prevent damaged properties and loss of lives. Surface engineering geological mapping at a 1:25000 scale was conducted to develop a detailed landslide susceptibility map for spatial planning and to identify most controlling factor of landslides in the research area based on conditions of geomorphology, rock and soil, geological structure, groundwater seepage, and land use. The engineering geological mapping showed that landslides commonly occurred in the moderate slopes of the denudational hill landform having slope inclination ranging from 9 to 17°, in the areas covered by residual soils of the vitric tuff 2 unit, in the areas of no groundwater seepage, and in the settlement areas, including in Kranjang Lor area where soil creeping occurred. The high susceptibility zone covered 55.5 % of the research area and was characterized by having slope inclinations ranging from 9 to 35°, engineering geological units of vitric tuff 2 and tuff breccia, and land uses of rice and dry fields and settlement. The low cohesion and very high swelling potential of the residual soils of the vitric tuff 2 unit were considered to be the main controlling factor of landslides in the research area.
Geological Engineering Department Universitas Gadjah Mada
2017-11-13 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/30254
Journal of Applied Geology; Vol 2, No 1 (2017)
eng
Copyright (c) 2017 I Gde Budi Indrawan, Diyaning Ratri
oai:jurnal.ugm.ac.id:article/30255
2018-11-14T03:04:51Z
jag:ART
nmb a2200000Iu 4500
"171113 2017 eng "
2502-2822
2086-5104
dc
Lithostratigraphy of Tabul Formation and Onshore Geology of Nunukan Island, North Kalimantan
Husein, Salahuddin
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Lithostratigraphy Tabul Formation Onshore geology Hydrocarbon exploration , Nunukan Island ,Kalimantan
Nunukan Island is located in Northeast Kalimantan Basin, one of prolific basin in western Indonesia. However, this island lies in northern verge of the basin and hydrocarbon exploration were limited before the 1940s. No detail geological fieldworks has been published. This paper attempts to share geological information obtained from few accessible outcrops, particularly from the western part of the island where previous oil drilling were carried out. Most of the island have been built by Tabul Formation, which was also the main objective of reservoir for hydrocarbon exploration. It is composed of claystones, siltstones, and sandstones interbeds, deposited in transitional environment during Late Miocene. They exhibit coarsening upward sequence, the lower part composed of heterolitic sandstones deposited in tidal flats, and the upper part composed of arkosic sandstones deposited in distributary channels and mouthbars. The eastern coastal strip was constructed by Tarakan conglomerates, which have been deposited in fluvio-deltaic environment in Pliocene, unconformably over the Tabul clastics. Those Neogene deposition of paleo-Simengaris Delta apparently deformed and inverted in Plio-Pleistocene, contemporaneously with basaltic volcanism which spread widely over northeastern Borneo, which also observed in the northern half of the Nunukan Island
Geological Engineering Department Universitas Gadjah Mada
2017-11-13 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/30255
Journal of Applied Geology; Vol 2, No 1 (2017)
eng
Copyright (c) 2017 Salahuddin Husein
oai:jurnal.ugm.ac.id:article/30256
2018-11-14T03:04:51Z
jag:ART
nmb a2200000Iu 4500
"171113 2017 eng "
2502-2822
2086-5104
dc
Assessment of Groundwater Contamination Hazard by Nitrate in Samas Area, Bantul District, Yogyakarta, Indonesia
Souvannachith, Thilavanh
Department of Water Resources Engineering, Faculty of Engineering, National University of Lao
Eka Putra, Doni Prakasa
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University,
Hendrayana, Heru
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University,
Nitrate Groundwater vulnerability Groundwater contaminant loading Groundwater contaminant hazard, Bantul, Indonesia
Groundwater resource is an essential for various purposes in Bantul district, Yogyakarta Special Province, Indonesia, especially on Poncosari village where the water supply are depending on shallow groundwater resources. On this village, most of the houses using dug wells to provide their water needs and applying inappropriate on-site sanitation system, however there are also difference land uses. This condition increase the hazard of groundwater contamination by fecal coli bacteria and nitrate. Therefore, this research aims in term of three main objectives: firstly, to know the level of nitrate concentration in groundwater, secondly, to assess groundwater vulnerability and thirdly, to assess the level of groundwater contaminant hazard. Hydrogeology observation was conducted and 47 water samples (44 groundwater samples and 3 surface water samples) were collected from different land use type and analyze for nitrate (NO 3) content. Methodology used to assess the groundwater vulnerability was Simple Vertical Vulnerability method and the groundwater contamination hazard built based on the combination of groundwater vulnerability and nitrate loading potential map. Results show that groundwater concentrations of nitrate range from 0.09–74.80 mg/L and the highest concentration found in the settlement area. Assessment of groundwater vulnerability reveals three areas of moderate, moderate high and high classes of vulnerability due to shallow groundwater and the sandy dominated overlying material in the study area. Combination of groundwater vulnerability and nitrate loading potential map indicated that groundwater contaminant hazard of nitrate range from low to high class. High class of hazard located in the settlement area, and low hazard of nitrate contamination found in the irrigated rice field area
Geological Engineering Department Universitas Gadjah Mada
2017-11-13 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/30256
Journal of Applied Geology; Vol 2, No 1 (2017)
eng
Copyright (c) 2017 Thilavanh Souvannachith, Doni Prakasa Eka Putra, Heru Hendrayana
oai:jurnal.ugm.ac.id:article/39979
2018-11-14T02:58:26Z
jag:ART
nmb a2200000Iu 4500
"181023 2018 eng "
2502-2822
2086-5104
dc
Hydrogeochemical Characterization of GeothermalWater in Arjuno-Welirang, East Java, Indonesia
Harijoko, Agung
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Martadiastuti, Vanadia
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Warmada, I Wayan
Department of Geological Engineering, Faculty of Engineering, Gadjah Mada University
Yonezu, Kotaro
Department of Earth Resources Engineering, Kyushu University
Water chemistry Geothermal Water chemistry _ Geothermal - Arjuno-Welirang - East Java - Indonesia
Arjuno-Welirang Volcanic Complex (AWVC) is one of geothermal fields which
located in East Java province, Indonesia. It belongs to a Quarternary volcanic arc and has potential for development of electricity. The field is situated in a steep volcanic terrain and there are only few geothermal manifestations, i.e., hot springs, fumaroles, solfataras, steaming ground and hydrothermal alteration. This study aims to classify the type and source of geothermal fluid and to estimate the reservoir condition of Arjuno- Welirang geothermal system. Data are obtained from collecting water samples including hot springs, cold springs, river waters and rain water, then they are analyzed using ICP-AES, titration and ion chromatography.All thermal waters have temperatures from 39.5–53°C and weakly acidic pH (5.2–6.5). Cangar and Padusanhot springs show bicarbonate water, formed by steam condensing or groundwater mixing. On the other hand, Songgoriti shows Cl-HCO3 type, formed by dilution of chloride fluid by either groundwater or bicarbonate water during lateral flow. All of the waters represent immature waters, indicating no strong outflow of neutral Cl-rich deep waters in AWVC. Cl/B ratios show that all water samples have a similar mixing ratio, showing they are from common fluid sources. However, Padusan and Songgoriti have higher Cl/B ratios than Cangar, suggesting that geothermal fluids possibly have reacted with sedimentary rocks before ascending to the surface. All waters were possibly mixed with shallow groundwater and they underwent rock-water reactions at depth before ascending to the surface. An estimated temperatures reservoir calculated using CO2 geothermometer yielded temperatures of 262–263 °C based on collecting of fumarole gas at Mt. Welirang crater. According to their characteristics, Cangar and Padusan are associated with AWVC, while Songgoriti is associated with Mt. Kawi.
Geological Engineering Department Universitas Gadjah Mada
2018-10-23 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/39979
Journal of Applied Geology; Vol 2, No 2 (2017)
eng
Copyright (c) 2018 Agung Harijoko, Vanadia Martadiastuti, I Wayan Warmada, Kotaro Yonezu
oai:jurnal.ugm.ac.id:article/39981
2018-11-14T02:58:26Z
jag:ART
nmb a2200000Iu 4500
"181023 2018 eng "
2502-2822
2086-5104
dc
Removal of Selenium (Se) and Zinc (Zn) inWater by Using Natural Zeolitic Tuff as Adsorbent from Tegalrejo Area, Gedangsari District, Gunungkidul Regency, Special Province Yogyakarta, Indonesia
Thepgnothy, Manixone
National University
Eka Putra, Doni Prakasa
Gadjah Mada University
Wilopo, Wahyu
Gadjah Mada University
Natural zeolitic tuff Selenium Zinc Sorption isotherm Indonesia
Heavy metals are one of the most hazardous pollutant in the water. There
are many methods for heavy metals remediation such as precipitation, oxidation, reverse
osmosis, ion exchange and sorption by reactive materials. Zeolite is one of reactive materials have been used for water remediation. Therefero, in this the capability of zeolite from Gedangsari District, Gunung Kidul Regency, Special Province of Yogyakarta, Indonesia, will be invetigated to remidiate contaminated water by selenium (Se) and Zinc (Zn). To answer this objective, several samples of natural zeolitic tuff were taken and charaterized. Laboratory experiment was done by batch test. The results showed that natural zeolitic tuff is an effective adsorbent of Se and Zn and holds great potential material to remove heavy metals in water. The sorption isotherms of Se and Zn confirmed to type of Langmuir or Freundlich isotherms.
Geological Engineering Department Universitas Gadjah Mada
2018-10-23 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/39981
Journal of Applied Geology; Vol 2, No 2 (2017)
eng
Copyright (c) 2018 Manixone Thepgnothy, Doni Prakasa Eka Putra, Wahyu Wilopo
oai:jurnal.ugm.ac.id:article/39983
2018-11-14T02:58:26Z
jag:ART
nmb a2200000Iu 4500
"181023 2018 eng "
2502-2822
2086-5104
dc
Landslide Susceptibility Mapping Using Analytical Hierarchy Process, Statistical Index, Index of Enthropy, and Logistic Regression Approaches in the TinalahWatershed, Yogyakarta
Indrawan, I Gde Budi
Universitas Gadjah Mada
Xiong, Tee
Universitas Gadjah Mada
Eka Putra, Doni Prakasa
Universitas Gadjah Mada
Analytical hierarchy process - Index of entropy - Landslide susceptibility - Logistic regression - Statistical index.
A number of approaches have been used inlandslide susceptibility mapping
and there seems to be no agreement on which approach provides best prediction of landslide susceptibility. This study was conducted to develop landslide susceptibility mapsof the Tinalah watershed at a 1:25000 scale using analytical hierarchy process (AHP), statistical index (SI), index of entropy (IOE) and logistic regression (LR) approaches and to compare performance of those approaches in predicting landslide susceptibility. Out of 114 landslides identified during site investigation, 86 landslides were selected for landslide susceptibility analyses, while the remaining 28 landslides were used to verify the results. Factors controlling landslides considered in the landslide susceptibility mapping were slope inclination, lithology, distance to fault, land use, distance to river, and rainfall. Analyses of Receiver Operating Characteristics (ROC) curves showed that the AUC values of the landslide susceptibility maps derived using AHP, SI, IOE and LR approaches were 0.784, 0.688, 0.827 and 0.834, respectively. The LR approach was concluded to perform the best in predicting landslide susceptibility in the study area.
Geological Engineering Department Universitas Gadjah Mada
2018-10-23 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/39983
Journal of Applied Geology; Vol 2, No 2 (2017)
eng
Copyright (c) 2018 I Gde Budi Indrawan, Tee Xiong, Doni Prakasa Eka Putra
oai:jurnal.ugm.ac.id:article/39988
2018-11-14T02:58:26Z
jag:ART
nmb a2200000Iu 4500
"181023 2018 eng "
2502-2822
2086-5104
dc
Basin Evolution Palispatic Model of Bonaparte Basin, Australia Northwest Shelf
Ricardo, Nomensen
Universitas Gadjah Mada
Amijaya, Hendra
Universitas Gadjah Mada
Husein, Salahuddin
Universitas Gadjah Mada
Neogene collision - Basin evolution - Palispatic model - Petroleum system - Australian northwest self.
This research area is located on the Australian NW Shelf close to the western
edge of the Sahul Platform. This research is aimed to generate the palispatic basin model of Bonaparte Basin, Australian Northwest Shelf. It is to predict the impact of Neogene collision on the petroleum system distribution on Australian Northwest Shelf. The main data used in this research are seismic data using qualitative method analysis. The well data is used to well-seismic tied. After data acquisition, the seismic data are interpreted based on the horizon and structure interpretation. These interpretation are to reconstruct the basin evolution thorough geologic time. According to data analysis, the basin evolution palispatic model are divided into Paleo-proterozoic, Paleozoic, Triassic, Early Jurassic, Middle Jurassic, Late Jurassic, Early Cretaceous, Late Cretaceous, Early Eocene, Late Miocene and Recent condition. Regional tectonically there are at least three important events in NW Shelf: Middle Triassic-Jurassic NNE–SSW extension phase, Late Jurassic NE–SW extension phase and the Neogen collision phase; the Neogen collision effects on Northwest Shelf Australia. These three events contributed in forming and disturbing the Paleozoic and Mesozoic petroleum system in Bonaparte basin especially.
Geological Engineering Department Universitas Gadjah Mada
2018-10-23 00:00:00
application/pdf
https://jurnal.ugm.ac.id/jag/article/view/39988
Journal of Applied Geology; Vol 2, No 2 (2017)
eng
Copyright (c) 2018 Nomensen Ricardo, Hendra Amijaya, Salahuddin Husein
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