Alteration and Minerals of Meri Block as an Indication of Gold Finding in Bolaang Mongondow District

Idarwati, Idarwati (2023) Alteration and Minerals of Meri Block as an Indication of Gold Finding in Bolaang Mongondow District. International Journal of Arts and Social Science, 6 (7). pp. 213-221. ISSN 2581-7922

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Abstract

The target of this research is the Meri Block in the Kotamobagu area, North Sulawesi. This study aims to determine the relationship of alteration and mineralization of the Meri Block to indications of South BolaangMongondow gold availability. The research was carried out by observing outcrops, taking samples, measuring geological structure data, and analyzing them. The analyzed were studio analysis, thin section, XRF, AAS, and XRD. The analysis results show that the Meri Block belongs to two original landform units: structural and denudational. The stratigraphy of the research location is composed of four units: andesite, travertine�silicified, sandstone, and diorite intrusive. The structure at this location is generally dominated by right-wing faults trending NNW-SSE and WNW-ESE. The Meri Block has a structure with a steep slope leading to the Northeast-Southwest and Northwest-Southeast. The Northwest-Southeast structural zone has quartz veins of Low Sulfidation Epithermal. The geological structure in the Meri Block is controlled by a right-hand fault with an NW-SE or N036E/52 direction. This fault is a boundary between the Andesite and Sandstone Unit and controls alteration traps. The deposit in this block is a Low Sulfidation Epithermal in the transition horizon from precious metal to base metal. The grade in the Meri Block is around 0.02 - 0.26 ppm, probably because the rock is still undergoing alteration outside the mineralized system, and no characteristic quartz veins have been found, even though the alteration has been intense. In the comparative chart analysis, the elements Au and Ag generally correlate positively, a characteristic of Low Sulfidation Epithermal. However, the elements Au and the base metals Pb, Zn, and Cu negatively correlate.

Item Type:	Article
Subjects:	Q Science > QE Geology > QE351-399.2 Mineralogy
Divisions:	03-Faculty of Engineering > 34201-Geological Engineering (S1)
Depositing User:	Idarwati Idarwati
Date Deposited:	08 Sep 2023 03:38
Last Modified:	08 Sep 2023 03:38
URI:	http://repository.unsri.ac.id/id/eprint/124573

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