STUDY OF ALTERATION, MINERALIZATION, AND CHARACTERISTICS OF RAMBA JORING GOLD ORE, HIGH SULPHIDATION EPITHERMAL DEPOSIT OF MARTABE AREA, BATANGTORU SUB-DISTRICT, SOUTH TAPANULI REGENCY, NORTH SUMATERA PROVINCE
The study was conducted on Ramba Joring Prospect, at Martabe Gold Mine owned by PT. Agincourt Resources at Batangtoru Sub-District, South Tapanuli Regency, North Sumatera Province. This research aims to determine the alteration, mineralization, distribution of gold, and characteristics of gold or...
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Format: | Final Project |
Language: | Indonesia |
Subjects: | |
Online Access: | https://digilib.itb.ac.id/gdl/view/69854 |
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Institution: | Institut Teknologi Bandung |
Language: | Indonesia |
Summary: | The study was conducted on Ramba Joring Prospect, at Martabe Gold Mine owned by PT.
Agincourt Resources at Batangtoru Sub-District, South Tapanuli Regency, North Sumatera
Province. This research aims to determine the alteration, mineralization, distribution of
gold, and characteristics of gold ore and its relation to the value of gold recovery in the
study area. The methods used in this research include core logging, petrographic and
mineragraphic analysis, size-by-size assay test, diagnostic leaching test, and pulverized
bottle roll test. From the analysis, the lithological units identified consist of Andesite
Hornblenda Unit and Phreatomagmatic Breccia Unit. The alteration zones developed in the
study area are massive-vuggy silica zone, advanced argillic zone, and argillic zone.
Furthermore, the study area was divided into three sulfide sulfur zones, including low sulfide
sulfur zone (SCIS <2%), the medium sulfide sulfur zone (2% <SCIS <5%), and the high
sulfide sulfur zone (SCIS >5%). Mineralization that occurred in each sulfide sulfur zone
shows the presence of different ore minerals depending on the alteration zone. Gold ore is
distributed in rocks with massive-vuggy silica alterations and advanced argillic alterations.
According to its sulfide sulfur zone, gold ore is dominantly distributed in the low sulfide
sulfur zone and the least in the high sulfide sulfur zone. Gold ore in the study area is
dominantly distributed in very fine size particles, associated with sulfide, carbonate, and
silicate minerals. Recovery value is affected by alteration, mineral association, percentage
of sulfide sulfur, and gold texture. |
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