ANALISIS ALTERASI DAN MINERALISASI BERDASARKAN PENGAMATAN MEGASKOPIK DAN MIKROSKOPIK PADA DAERAH PROSPEK X KABUPATEN BOLAANG MONGONDOW, SULAWESI UTARA

ALTERATION AND MINERALIZATION ANALYSIS BASED ON OBSERVATION OF MEGASCOPIC AND MICROSCOPIC ON PROSPECT "X" IN BOLAANG MONGONDOW REGENCY AT NORTH SULAWESI

Authors

  • Gita Dela Christi Politeknik Energi Dan Pertambangan Bandung Author
  • Sulistiyono Sulistiyono Politeknik Energi Dan Pertambangan Bandung Author
  • Tatik Handayani Pusat Sumber Daya Mineral Batubara dan Panas Bumi Author
  • Denni Widhiyatna Pusat Sumber Daya Mineral Batubara dan Panas Bumi Author

DOI:

https://doi.org/10.47599/bsdg.v19i1.436

Abstract

The North Arm of Sulawesi Island is a gold-rich metallogenic belt. The study area is located in Bakan Village, Bolaang Mongondow Regency, North Sulawesi in the IUP area of PT J Resources Bolaang Mongondow. Exploration to obtain new prospect areas is still being carried out. Therefore, research on alteration and mineralisation characteristics is expected to be a reference for the discovery of new prospects. The research was conducted by identifying surface and subsurface data megascopically and microscopically. Microscopic observations with petrography and mineragraphy. To obtain surface data, alteration observations, channel sampling and grab sampling were carried out, while subsurface data were obtained from core drilling. The purpose of the study was to determine the alteration, mineralisation, oxidation, and  deposits type. The study area has lithologies of hydrothermal breccia, diatreme breccia, fault breccia, and tuff breccia. Alteration developed in the form of vuggy sillica, massive sillica, advanced argillic, and argillic. Mineralisation includes gold and silver and sulphide minerals such as pyrite, chalcopyrite, sphalerite, enargite, covellite, and oxide minerals such as goethite, jarosite and hematite. The epithermal high sulphidation deposit type was formed at medium depth, with oxide-type ore.

 

References

Adams. A. E, MacKenzie, and C. Guilford., 1984, Atlas of sedimentary rocks under the microscope.

Augustithis, 1995, Atlas of the Textural Patterns of Ore Minerals and Metallogenic Processes.

Corbett, G. J., and Leach, T. M., 1998, Southwest Pacific Rim Gold Copper Systems: Structures, Alteration, and Mineralization.

Hedenquist. J. W, Arribas. A, Urien. E. G., 2000, Exploration for epithermal gold deposit. 99 Fifth Avenue, Suite 420, Ottawa, Ontario K1S 5P5, Canada.

Ineson, P. R., 1989, Introduction to Practical Ore Microscopy. University of Manchester. British Library Cataloguing in Publication Data.

Internal JRBM Data, 2020, Alteration map of ARS Pit, Unpublished, PT J Resources Bolaang Mongondow, Mine Geology Departement Internal Report.

Kavalieris, I., van T.M Leeuwe, dan Wilson M., 1992, Geological Setting and Styles of Mineralisation, North Arm of Sulawesi, Indonesia. J. SE Asian Earth.

Li Linda, 2020, Equipment Manufacturing & Solutions for Crushing, Grinding, Washing, Drying, Beneficiating. China.

MacKenzie W. S, A. E. Adams, and K. H. Brodie, 2017, Rocks and Minerals in Thin Section. CRC Press/Balkema.

MacKenzie, W. S, C. H. Donaldson, C. Guilford, 1982, Atlas of Igneous Rocks and Their Texture.

Parcejus, B., 2008, The Ore Minerals under The Microscope. First Edition. Elsevier, Amsterdam.

Parcejus, B., 2015, The Ore Minerals under The Microscope. Second Edition. Elsevier, Amsterdam.

Pearson, D. F. and Caira, N.M., 1999, The Geology and Metallogeny of Central North Sulawesi. In: PACRIM ’99 Congress. Australian Institute of Mining and Metallurgy, 4/99, p.311 - 326.

Thompson, 1996, Atlas of Alteration, Canada.

Uytenbogaardt, W. dan Burke, E. A. J., 1971, Table for the Microscopic Identification of Ore Minerals. Elsevier Scientific Publishing Company, New York.

Van Leeuwen, T. M. dan Muhardjo, 2005, Stratigraphy and Tectonic Setting of the Cretaceous and Palaeogene Volcanic–Sedimentary successions in Northwest Sulawesi, Indonesia: Implications for the Cenozoic evolution of Western and Northern Sulawesi. Journal of Asian Earth Sciences, 25, p. 481 - 511.

Yardley, B. W. D, W. S. MacKenzie, and C. Guilford, 1990, Atlas of metamorphic rocks and their textures.

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Published

2024-05-19

Issue

Vol. 19 No. 1 (2024): Buletin Sumber Daya Geologi

Section

Buletin Sumber Daya Geologi

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