Agus Harjanto, AH and Sutanto, ST and Sutarto, SR (2016) HYDROTHERMAL ALTERATION IN DUMOGA BARAT, BOLAANG MONGONDOW AREA, NORTH SULAWESI. HYDROTHERMAL ALTERATION IN DUMOGA BARAT, BOLAANG MONGONDOW AREA, NORTH SULAWESI, 37 (1). pp. 27-40. ISSN ISSN 0854-1418
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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.
| Item Type: | Article |
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| Subjects: | Q Science > QE Geology |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Geography |
| Depositing User: | sutanto sutanto - |
| Date Deposited: | 08 Nov 2017 08:15 |
| Last Modified: | 08 Nov 2017 08:24 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/13622 |
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