ALTERASI DAN MINERALISASI BIJIH PADA BATUAN DIORIT DI DAERAH WOMBO, SULAWESI TENGAH

Authors

  • A. Nurul Novia Rahmaningrum Program Studi Teknik Geologi, Fakultas Teknik, Universitas Tadulako, Indonesia
  • Asrafil Asrafil Program Studi Teknik Geologi, Fakultas Teknik, Universitas Tadulako, Indonesia

DOI:

https://doi.org/10.23960/jge.v7i2.136

Keywords:

Alteration, Chalcopyrite, Covelite, Ore Mineralization, Pyrite

Abstract

Daerah Wombo Kecamatan Tanantovea Kabupaten Donggala Provinsi Sulawesi Tengah merupakan salah satu daerah yang diduga mempunyai potensi mineralisasi bijih. Hal ini diindikasikan dengan adanya kenampakan permukaan berupa batuan diorit yang telah mengalami alterasi. Penelitian ini bertujuan untuk mengidentifikasi karakteristik alterasi hidrotermal dan mineralisasi bijih dengan metode penelitian lapangan dan analisis laboratorium berupa petrografi, XRD dan mineragrafi. Berdasarkan analisis petrografi dan XRD, alterasi hidrotermal dicirikan oleh alterasi propilitik (klorit-zeolit-kalsit) dan alterasi argilik (illit-kuarsa-kalsit). Berdasarkan analisis mineragrafi, mineralisasi bijih di daerah penelitian dicirikan oleh kehadiran pirit (FeS2), kalkopirit (CuFeS2) dan kovelit (CuS). Hasil interpretasi menunjukkan bahwa urutan pembentukan mineral bijih berdasarkan pengamatan tekstur yaitu diawali dengan pirit yang hadir mengisi rekahan-rekahan pada batuan, kalkopirit intergrowth dengan pirit yang menandakan kalkopirit hadir bersamaan dengan pirit, replacement kovelit terhadap kalkopirit dan pirit menunjukkan kehadiran kovelit setelah pirit dan kalkopirit.

References

Bachri, S., & Sidarto. (2013). Tektonik Sulawesi dalam: Geologi Sulawesi.

Corbett, G. J., & Leach, T. M. (1998). Southwest Pacific Rim Gold-Copper Systems: Structure, Alteration, and Mineralization. Society of Economic Geologists. https://doi.org/10.5382/SP.06

Craig, J. R., & Vaughan, D. J. (1994). Ore Microscopy and Ore Petrography. New York: John Wiley & Sons, Inc.

Evans, A. M. (2009). An Introduction to Economic Geology and Its Environmental Impact. John Wiley & Sons.

Hartusuwarno, S. (2005). Endapan Mineral. Laboratorium Petrologi dan Bahan Galian FTM UPN “Veteran†Yogyakarta.

Idrus, A., Sufriadin, S., & Nur, I. (2011). HYDROTHERMAL ORE MINERALIZATION IN SULAWESI: A VIEW POINT OF TECTONIC SETTING AND METALLOGENESIS.

Jensen, M. L., & Bateman, A. M. (1981). Economic Mineral Deposits. John Wiley & Sons, Inc.

Lawless, J. V., White, P. J., Bogie, I., Paterson, L. A., & Cartwright, A. J. (1998). Hydrothermal Models., Mineral Deposits in The Arc Setting : Exploration Based on Mineralization Service. Kingston Morrison Mineral.

Leeuwen, v. T., & Pieters, P. E. (2012). Mineral Deposits of Sulawesi. Geological Agency.

Magdalena, M. (2010). Studi Alterasi dan Mineralisasi Tembaga pada Area Tambang Batu Hijau. Institut Teknologi Bandung.

Marliani, M, dan Asrafil, A. (2021). (2021). Indication of Ore Mineralization in Bora Area, Sigi Regency, Central Sulawesi. In Journal of Physics: Conference Series Vol. 1763, No. 1, p. 012082.

Maulana, A. (2017). Endapan Mineral. Penerbit Ombak.

Maulana, A., Bröcker, M., & Dan, W. (2020). Petrogenesis and geochronology of Cenozoic intrusions in the Poboya and Sassak gold and copper districts in Western Sulawesi, Indonesia: Implications for the mineralization processes and magma sources. Journal of Asian Earth Sciences, 193, 104303.

Pirajno, F. (2009). Hydrothermal Processes and Mineral Systems. Springer - Geological Survey of Western Australia.

Ramdohr, P. (1969). The Ore Minerals and Their Intergrowths. Pergamon Press.

Ruppel, K. M. V., Dani, N., Remus, M. V. D., Ronchi, L. H., Gomes, M. E. B., & Senhorinho, E. (2018). Temperature and Pressure in The Environment of Epithermal Alteration: A Case Study at Ibaré Lineament, Rio Grande do Sul, Brazil. Brazilian Journal of Geology, 48, 685–702.

Syafrizal, Rivai, T. A., Yonezu, K., Kusumanto, D., Watanabe, K., & Hede, A. N. H. (2017). Characteristics of a Low-Sulfidation Epithermal Deposit in the River Reef Zone and the Watuputih Hill, the Poboya Gold Prospect, Central Sulawesi, Indonesia: Host Rocks and Hydrothermal Alteration. Minerals, 7(7), 124.

Wajdi, M. F., Santoso, S. T. J., Kusumanto, D., & Digdowirogo, S. (2011). Metamorphic Hosted Low Sulphidation Epithermal Gold System at Poboya, Central Sulawesi: A General Descriptive Review. In Proceedings of The Sulawesi Mineral Seminar, Manado, 201–210.

White, N. C., & Hedenquist, J. W. (1995). Epithermal gold deposits. Styles, characteristics and exploration. SEG Newsletter, 27, 1–13.

Winter, J. D. (2014). Principles of Igneous and Metamorphic Petrology (Vol. 2). Pearson Education.

Zar, A. T., Warmada, I. W., Setijadji, L. D., & Watanabe, K. (2018). Alteration, vein textures and fluid inclusion petrography of metamorphic rock-hosted gold deposit at Onzonkanbani area, central Myanmar: Implication for its genesis. ASEAN Engineering Journal, 8(2), 48–63.

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Published

2021-07-25

How to Cite

Rahmaningrum, A. N. N., & Asrafil, A. (2021). ALTERASI DAN MINERALISASI BIJIH PADA BATUAN DIORIT DI DAERAH WOMBO, SULAWESI TENGAH. JGE (Jurnal Geofisika Eksplorasi), 7(2), 138–149. https://doi.org/10.23960/jge.v7i2.136

Issue

Vol. 7 No. 2 (2021)

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