Mineralogy and Ore Characteristics of the Kujang Pb-Zn Skarn Deposit, Sukabumi Regency, West Java

https://doi.org/10.22146/jag.78105

Eka Harris Suryawan(1*), Arifudin Idrus(2), Imam Suyanto(3), Ilham Ilmawan(4), M.Dzulfikar Faruqi(5)

(1) Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta
(2) Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta
(3) Department of Physics, Universitas Gadjah Mada, Yogyakarta
(4) PT. Generasi Muda Bersatu, Jakarta
(5) PT. Generasi Muda Bersatu, Jakarta
(*) Corresponding Author

Abstract


The Kujang Pb-Zn skarn deposit is known to be the newest skarn deposit found in the Sunda-Banda magmatic arc. The skarn orebodies are mostly hosted by limestone which might be the part of the Jampang Formation where dacite porphyry is interpreted to be the ore causative intrusion. Orebodies are mostly found at the contact between marbleized limestone and volcanic rocks and are controlled by NW-SE-trending strike-slip faults. Previous research on the mineralogy and ore characteristics of the Kujang Prospect remains limited on the preliminary studies. Using fieldwork data, petrography, ore microscopy, and assay data from core samples, this study is aimed to characterize the mineralogy of both alteration and ore of the deposit. The alteration of the Kujang Prospect skarn can be divided into 2 phases of alteration i.e. prograde and retrograde. The prograde alteration is characterized by the occurrence of clinopyroxene, wollastonite, and vesuvianite. Garnet is present in very rare amounts. the retrograde alteration is typified by epidote, chlorite, calcite and actinolite. Metalliferous minerals are represented by sphalerite, galena, pyrrhotite, chalcopyrite and pyrite. All ore minerals are formed at the early retrograde stage. the deposit’s average grade is 2.06% Pb, 6.45% Zn and 1.81% Cu.


Keywords


mineralogy and ore characteristics; skarn deposit; Sukabumi.

Full Text:

PDF


References

Al Furqan, R. (2014). Geology of Pinang-Pinang Skarn Au-Cu ± Mo Deposit, Aceh, Indonesia.Proceedings of Sundaland Resources-MGEI Annual Convention, 291–299.

Bensaman, B., Furqan, R. A., Rosana, M. F., & Yuningsih, E. T. (2015). Hydrothermal Alteration and Mineralization Characteristics of Gajah Tidur Prospect, Ertsberg Mining District, Papua, Indonesia. Proceedings of the 2nd International Conference and 1st Joint Conference Faculty of Geology Uni versitas Padjajaran with Faculty of Science and Natural Resources University of Malaysia Sabah, 1–9.

Clements, B. (2007). Cretaceous to Late Miocenestratigraphic and tectonic evolution of West Java. Indonesian Petroleum Association, Proceedings 31st Annual Convention, 87–104. https://doi.org/10.29118/IPA.1520.07.G.037

Dana, C. D. P., Agangi, A., Takahashi, R., Idrus, A., Lai, C., & Nainggolan, N. A. (2022).Element mobility during formation of the Ruwai Zn-Pb-Ag skarn deposit, Central Borneo, Indonesia. Resource Geology, 72(1), 1–25. https://doi.org/10.1111/rge.12290

Idrus, A., Setijadji, L. D., & Fenny, T. (2011). Geology and Characteristics of Pb-Zn-Cu-Ag SkarnDeposit at Ruwai, Lamandau Regency, Central Kalimantan. Jurnal Geologi Indonesia, 6(4), Article 4.

Kwak, T. A. P. (1986). Fluid inclusions inskarns (carbonate replacement deposits).Journal of Metamorphic Geology , 4(4), 363–384. https://doi.org/10.1111/j.1525-1314.1986.tb00358.x

Meinert, L. D. (2020). Geology, Policy, and Wine – The Intersection of Science andLife. Geochemical Perspectives , 9(1), Article 1. https://doi.org/10.7185/geochempersp.9.1

Meinert, L. D., Hefton, K. K., Mayes, D., & Tasiran,I. (1996). Geology, Zonation, and Fluid Evolution of the Big Gossan Cu-Au Skarn Deposit, Ertsberg District, Irian Jaya. Economic Geology, 92(5), 509–534. https://doi.org/10.2113/gsecongeo.92.5.509

Morrison, K. (1997). Important Hydrothermal Minerals and Their Significance (7th ed.). Kingston Morrison Limited.

Sukamto, R. (1975). Peta Geologi Lembar Jampang Balekambang [Map]. Pusat Penelitian dan Pengembangan Geologi.

Terry, R. D., & Chilingar, G. V. (1955). Summary of “Concerning some additional aids in study-ing sedimentary formations,” by M. S. Shvetsov. Journal of Sedimentary Research , 25(3), 229–234. https://doi.org/10.1306/74D70466-2B21-11D7-8648000102C1865D

van Bemmelen, R. W. (1949). The geology of Indonesia (Vol. 1). The Hague.

Wu, C.-Q., Zhang, Z.-W., Zheng, C.-F., & Yao, J.-H. (2015). Mid-Miocene (~17 Ma) quartz diorite porphyry in Ciemas, West Java, Indonesia, and its geological significance.International Geology Review, 57(9–10), Article 9–10. https://doi.org/10.1080/00206814.2014.908748

Xu, R., Deng, M.-G., Li, W.-C., Lai, C.-K., Zaw, K., Gao, Z.-W., Chen, Y.-H., Niu, C.-H., & LiangG. (2021). Origin of the giant Luziyuan Zn-Pb- Fe(-Cu) distal skarn deposit, Baoshan block, SETibet: Constraints from Pb–Sr isotopes, calcite C–O isotopes, trace elements, and Sm–Nd dating. Journal of Asian Earth Sciences, 205, 104587. https://doi.org/10.1016/j.jseaes.2020.104587

Yulianto, I. (2007, May 1). Structural and stratigraphic evolution of the offshore Malingping Block, West Java, Indonesia. Proc. Indon Petrol. Assoc., 31st Ann. Conv. Thirty-First Annual Convention . https://doi.org/10.29118/IPA.2540.07.G.036

Zhang, Z., Wu, C., Yang, X., Zheng, C., & Yao, J. (2015). The trinity pattern of Au deposits withporphyry, quartz–sulfide vein, and structurally controlled alteration rocks in Ciemas, West Java,Indonesia. Ore Geology Reviews , 64, 152 171.https://doi.org/10.1016/j.oregeorev.2014.07.00384



DOI: https://doi.org/10.22146/jag.78105

Article Metrics

Abstract views : 798 | views : 230

Refbacks

  • There are currently no refbacks.


Copyright (c) 2024 Eka Harris Suryawan

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Journal of Applied Geology Indexed by:

 

Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.