Karakteristik Alterasi dan Mineralisasi Tipe Epitermal Daerah Gunung Budheg dan Sekitarnya, Tulungagung, Jawa Timur
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Abstract
The discovery of vuggy quartz boulders around Pojok Village, Gunung Budheg area, Tulungagung, East Java, indicates the presence of mineral deposits process in this area. This study aims to discuss detailed characteristics of alteration and mineralization as well as mineral deposits type in the study area. The research methods are field observations completed with petrography, X-ray Diffraction (XRD), and mineragraphy laboratory analysis. The rock unit in the study area consists of six lithology units, a dacitic intrusion, andesitic lava, andesitic breccia, poly-mix breccia, reef limestone, and alluvium. The study area's alteration types are profilitic alteration, argillic alteration, advanced argillic, and silicification alteration. The profilitic alteration characterized by the abundance of chlorite minerals. The argillic alteration characterized by the abundance of kaolin minerals, while the advanced argillic alteration by the presence of kaolinite and alunite minerals. The silicification alteration characterized by abundance quartz minerals. The metallic minerals dominated in the area are sulfide minerals such as covellite, chalcocite, enargite, chalcopyrite, pyrite, and jarosite. The native gold found in an association with enargite. The study area's mineral deposit system is an epithermal high sulfidation system characterized by mineralized vuggy quartz and the presence of kaolinite mineral as an alteration mineral.
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References
[1] A. Maryono, L. D. Setijadji, J. Arif, dan R. Harrison, “Gold, Silver , and Copper Metallogeny of the Eastern Sunda Magmatic Arc Indonesia” Majalah Geologi. Indonesia, vol. 29, no. 2, pp. 85–99, 2014.
[2] J. Carlile dan A. H. Mitchell, “Magmatic Arcs and Associated Gold and Copper Mineralization in Indonesia,” Journal of Geochemical Exploration., vol. 50, no. 91–142, 1994.
[3] L. D. Setijadji, S. Kajino, A. Imai, dan K. Watanabe, “Cenozoic Island Arc Magmatism in Java Island (Sunda Arc, Indonesia): Clues on Relationships Between Geodynamics of Volcanic Centers and Ore Mineralization,” Resource. Geology., vol. 56, no. 3, pp. 267–292, 2006, doi: 10.1111/j.1751-3928.2006.tb00284.x.
[4] S. Sirisokha, L. D. Setijadji, dan I. W. Warmada, “Mineral Potential Mapping Using Geographic Information Systems (GIS) for Gold Mineralization in West Java, Indonesia,” Journal of Applied. Geology, vol. 7, no. 1, p. 61, 2015, doi: 10.22146/jag.26980.
[5] R. W. Van Bemmelen, "The Geology of Indonesia, Vol. 1A". Netherland: The Hague, 1949.
[6] H. Samodera, Suharsono, S. Gafoer, dan T. Suwarti, "Peta Geologi Lembar Tulungagung Skala 1:100.000", Bandung: Pusat Penelitian dan Pengembangan Geologi, 1992.
[7] W. Widodo dan S. Simanjuntak, “Hasil Kegiatan Eksplorasi Mineral Logam Daerah Pegunungan Selatan Jawa Timur (JICA/MMAJ-Jepang) dan Cianjur (KIGAM-Korea),” Kolok. Direktorat Inventar. Sumber Daya Mineral. TA. 2002, pp. 8-1–8-14, 2002.
[8] S. Masti dan A. Idrus, “Geologi, Alterasi dan Mineralisasi Endapan Epitermal Sulfidasi Tinggi di Daerah Wonotirto dan Sekitarnya, Kabupaten Blitar, Provinsi Jawa Timur, Indonesia,” Prosiding Seminar Kebumian Ke-12, Teknik Geologi, Fakultas Teknik, Universitas Geologi, pp. 1078–1095, 2019.
[9] F. Aldan, A. Idrus, R. Takahashi, dan G. Kaneko, “Spatial and Temporal Constraints of Leached Cu-Au Porphyry Shoulder High-sulfidation Epithermal Deposit : Insight from New Discovered Kumbokarno Prospect, Trenggale District, East Java” Journal of Physics Conference Series, vol. 1367, pp. 1–14, 2019, doi: 10.1088/1742-6596/1367/1/012037.
[10] R. A. Van Zuidam, "Guide to Geomorphologic Aerial Photographic Interpretation and Mapping" Netherland: ITC: Enschede The Netherlands, 1983.
[11] R. Abdissalam, S. Bronto, A. Harijoko, dan A. Hendratno, “Identifikasi Gunung Api Purba Karangtengah di Pegunungan Selatan, Wonogiri, Jawa Tengah” Indonesian Journal Geoscience, vol. 4, no. 4, 2009, doi: 10.17014/ijog.v4i4.85.
[12] D. Yudiantoro, A. B. Riarto, L. Agie, D. Agus, dan I. Takhasima, “Analisis Alteration Box Plot Terhadap Batuan Vulkanik Terubah, Studi Kasus Batuan Vulkanik Binangun Jawa Timur,” Journal Ilmu Kebumian Teknologi Mineral, vol. 28, no. 1, pp. 13–20, 2010.
[13] Praptisih dan M. Siregar, “Fasies Karbonat Formasi Campurdarat di Daerah Tulungagung, Jawa Timur,” Jurnal Geologi dan Sumberdaya Mineral, vol. 22, no. 2, pp. 65–72, 2012.
[14] C. I. Abdullah, N. A. Magetsari, dan H. S. Purwanto, “Analisis Dinamik Tegasan Purba pada Satuan Batuan Paleogen – Neogen di Daerah Pacitan dan Sekitarnya, Provinsi Jawa Timur Ditinjau dari Studi Sesar Minor dan Kekar Tektonik” ITB Journal of Science, vol. 35, no. 2, pp. 111–127, 2003, doi:10.5614/itbj.sci.2003. 35.2.3.
[15] K. Morrison, "Important Hydrothermal Minerals and Their Significance". United Kingdom: Kingston Morrison Mineral Service, 1997.
[16] P. Voudouris, C. Mavrogonatos, P. G. Spry, T. Baker, V. Melfos, R. Klemd, K. Haase, A. Repstock, A. Djiba, U. Bismayer, A. Tarantola, S. Scheffer, R. Moritz, K. Kouzmanov, D. Alferis, K. Papavassilou, A. Schaarschmidt, E. Galanopoulos, E. Galanos, J. Kolodziekjczyk, C. Stregiou dan M. Melfou, “Porphyry and Epithermal Deposits in Greece: An Overview, New Discoveries, and Mineralogical Constraints on Their Genesis” Ore Geology Reviews, vol. 107, pp. 654–691, 2019, doi: 10.1016/j.oregeorev. 2019.03.019.
[17] M. M. Tun, I. W. Warmada, A. Idrus, A. Harijoko, O. Verdiansyah, dan K. Watanabe, “High Sulfidation Epithermal Mineralization and Ore Mineral Assemblages of Cijulang Prospect, West Java, Indonesia,” Journal of Applied Geology, vol. 6, no. 1, 2015, doi: 10.22146/jag. 7215.
[18] W. Widodo, S. A. Prapto, dan I. Nursahan, “Inventarisasi dan Evaluasi Mineral Logam di Pegunungan Selatan Jawa Timur (Kabupaten Pacitan, dll), Jawa Timur,” Kolokium Direktorat Inventarisasi Sumber Daya Mineral. TA. 2002, pp. 17–1 – 17–10, 2002.
[19] A. Arribas, “Characteristics of High-Sulfidation Epithermal Deposits, and Their Relation to Magmatic Fluid” Mineralogical Association of Canada Short Course, vol. 23, pp. 419–454, 1995, doi: 10.1186/2193-1801-3-130.
[20] D. Moncada, J. D. Rimstidt, dan R. J. Bodnar, “How to Form a Giant Epithermal Precious Metal Deposit: Relationships Between Fluid Flow Rate, Metal Concentration of Ore-forming Fluids, Duration of the Ore-forming Process, and Ore Grade and Tonnage” Ore Geology Reviews, vol. 113, p. 103066, 2019, doi: 10.1016/j.oregeorev. 2019.103066.
[21] T. Bissig, A. H. Clark, A. Rainbow, dan A. Montgomery, “Physiographic and Tectonic Settings of High-sulfidation Epithermal Gold-silver Deposits of the Andes and Their Controls on Mineralizing Processes” Ore Geology Reviews, vol. 65, no. P1, pp. 327–364, 2015, doi: 10.1016/j.oregeorev.2014.09.027.