Alterasi Akibat Proses Hidrothermal di Bolaang Mongondow, Provinsi Sulawesi Utara
Article Sidebar
Main Article Content
Abstract
Bolaang Mongondow is located in central north Sulawesi arm, which is composed of Neogen magmatic arc and potentially contain economic minerals. This condition is behind the research purpose to study the mineral resources potencies. Research aim is to study alteration caused by hydrothermal process and its relation with gold (Au) deposit based on field study and laboratory analysis. Methodologies used for the research are literature study, geological survey, rocks sampling, laboratory analysis, and data processing. Research area is a multiply diorite intrusion complex. Andesite, volcaniclastic rocks, and dacite, the older rocks, were intruded by this complex. Later, dacitic tuff, volcanic sandstone, and alluvium deposited above them. There are three measured and mapped major faults heading NE-SW crossed by E-W fault and NW-SE fault lately crossed all the older faults. Early stage hydrothermal alteration related to the existence of young quartz diorite, showing alteration stage from the potassic center to distal prophyllitic. Final stage hydrothermal alteration consist of argilic, advanced argilic, and silica-clay mineral±magnetite±chlorite alteration overlapping the earlier alteration. Mineralization of Cu-Au±Ag in central part of research area or Tayap-Kinomaligan area is mostly asociated with potassic altered young quartz diorite and crossed by paralel and stockworked quartz-magnetite-chalcopyrite±bornite vein.
Article Details
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
1. Introduction
By using or sharing content from EKSPLORIUM - Buletin Pusat Pengembangan Bahan Galian Nuklir ("the Journal"), you agree to follow these Terms and Conditions. The Journal's content is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike (CC BY-NC-SA) license. If you do not agree to these terms, please do not use the content.
2. How You Can Use the Content
-
Share: You can copy, share, and distribute the work, but only for non-commercial purposes.
-
Adapt: You can change, remix, or build on the work, as long as it is for non-commercial purposes and you share it under the same license (CC BY-NC-SA).
3. Attribution (Giving Credit)
When you use or share the content, you must:
-
Give proper credit to the author(s).
-
Mention the title of the work and the journal name.
-
Provide a link to the license (https://creativecommons.org/licenses/by-nc-sa/4.0/).
-
Indicate if you made any changes to the work.
4. Non-Commercial Use
You cannot use the work to make money or for any commercial activities. For example, you cannot sell or use the content in advertisements.
If you want to use the content for commercial purposes, you need to get permission from the author(s) or the publisher.
5. ShareAlike
If you make changes to the content (like creating a new version or remixing it), you must share your new version under the same CC BY-NC-SA license.
6. Exclusions
Some materials in the Journal may have different licenses or restrictions, such as third-party content (like images or datasets). You must respect the rules for those materials.
7. No Warranty
The content is provided "as is." The authors and publisher do not guarantee that the content is error-free or suitable for any specific purpose. Use the content at your own risk.
8. Modifications and Withdrawal of Content
The publisher and authors can update or remove content at any time. If content is removed, the previous versions will still follow these terms.
9. Ethical Use
You must use the content ethically and follow all relevant laws. This includes properly citing the original authors and not misusing the content.
10. Legal Compliance
You are responsible for making sure your use of the content follows the laws of your country. If you believe content violates your rights, please contact us.
11. Changes to Terms
These Terms and Conditions may be updated from time to time. Any changes will be posted on the Journal's website.
12. Contact Information
For questions about these Terms or for permission to use content commercially, please contact us at:
-
Email: eksplorium@brin.go.id
-
Website: https://ejournal.brin.go.id/eksplorium
Conclusion
By using the content from EKSPLORIUM - Buletin Pusat Pengembangan Bahan Galian Nuklir, you agree to follow these Terms and Conditions and the CC BY-NC-SA 4.0 International License.
References
T. M. Van Leeuwen and P. E. Pieters, “Mineral Deposits of Sulawesi,” in Sulawesi Mineral Resources 2011 Seminar, 2011, no. November, pp. 1–10.
A. Sofyan, “Inventarisasi dan Evaluasi Mineral Logam di Kabupaten Bolaang Mongondow dan Kabupaten Minahasa Selatan, Provinsi Sulawesi Utara,” in Kolokium Direktorat Inventarisasi Sumber Daya Mineral Tahun 2005/Prosiding 2006, 2005.
B. Budiman, I. Hardjana, and Hermadi, “The Discovery, Geology, and Exploration of the High Sulphidation Au-Mineralization System in the Bakan District, North Sulawesi,” Maj. Geol. Indones., vol. 27, no. 3, pp. 143–157, 2012.
A. Arifin, “Tipe Endapan Epitermal Daerah Prospek Bakan, Kecamatan Lolayan, Kabupaten Bolaang Mongondow, Propinsi Sulawesi Utara,” J. Ilm. MTG, vol. 6, no. 1, 2013.
I. Nur dan A. Ilyas, “Studi Alterasi-Mineralisasi Hidrotermal berdasarkan Analisis Mikroskopis dan Kimia pada Prospek Emas di Daerah Daenaa, Limboto, Kabupaten Gorontalo,” in Prosiding Hasil Penelitian Fakultas Teknik Universitas Hasanudin, 2014, pp. 1–10 (TG4).
S. J. Suprapto, “Geokimia Regional Sulawesi Bagian Utara Percontoh Endapan Sungai Aktif -80 Mesh,” J. Geol. Indones., vol. 1, no. 2, pp. 73–82, 2006.
J. C. Carlile, S. Digdowirogo, and K. Darius, “Geologic Setting, Characteristics, and Regional Exploration for Gold in the Volcanic Arcs of North Sulawesi, Indonesia,” J. Geochem. Explor., vol. 35, pp. 105–140, 1990.
D. F. Pearson and N. M. Caira, “The Geology and Metallogeny of Central North Sulawesi,” in Pacrim ‘99 Congress Proceedings, 1999, pp. 311–326.
I. Kavalieris, T. M. van Leeuwen, and M. Wilson, “Geological Setting and Styles of Mineralization, North Arm of Sulawesi, Indonesia,” J. Southeast Asian Earth Sci., vol. 7, no. 2–3, pp. 113–129, 1992.
T. Apandi dan S. Bachri, Peta Geologi Lembar Kotamubagu Sulawesi. Bandung: Pusat Penelitian dan Pengembangan Geologi, 1997.
