Karakteristik Alterasi Dan Mineralisasi Sulfidasi Tinggi Pada Pit “X” PT. J Resources Bolaang Mongondow

Abstract

One of the areas that has gold deposits is Bakan village, sub-district. East Pinolosian, Bolaang
Mongondow district. The research location itself is included in the work contract area of PT. J
Resources is precisely located in Motandoi village, Kec. East Pinolosian, South Bolaang Mongondow
Regency, North Sulawesi. The method used in this research is collecting surface geological data,
especially through geological, alteration and mineralization mapping which is integrated with
laboratory analysis (Petrography, analytical spectral device and fire assay). There are 4 alteration
zones in the research area, namely the quartz – alunite zone with a vuggy texture, the quartz – alunite
zone with a massive texture, the quartz – alunite – kaolinite – small zone, and the kaolinite – illite ±
quartz zone. The mineralization that develops in the research area is divided into 2, namely the
oxidation mineral association (hematite – geotite – jarosite), and the energetic mineral association –
pyrite. The mineralization that dominates the research area is the oxidation mineral association.
Mineral deposits in the research area are of the high sulfidation epithermal deposit type.
Keywords: Bakan, Geology, alteration, mineralization, epithermal, characteristic