Temperature of gold mineralization in Arinem Cisewu and its surrounding, Garut Regency, West Java

Garut Regency, especially Arinem area and its surrounding is generally comprised of igneous rock from the activity of ancient magmatic and young volcano of Papandayan, accountable for potential ore deposit. Arinem Cisewu and its surrounding is an area of alteration and mineralization, such as gold, copper, lead and zinc. There are lithology units resulted from ancient volcanism process in the form of volcanic sediment and intrusion, and other geological processes assisting the formation of ore mineral deposit. Geological structures controlling the ore deposit potential was found in the research area. The location of our research is a part of Mining Permit of Aneka Tambang Mining Company and also several artisanal mining of gold, copper and galena that had been closed down. Previous research showed that the area and its vicinity has Epithermal Low Sulfidation deposit type which generally could be identified in the quartz veins. This research is a continuation of the previous one in order to know the temperature of mineralization and alteration zone, as well as lithology and geological structure in research area. The general method of this research is surface mapping, and the temperature data was obtain by fluid inclusion analysis of the quartz vein samples acquired in the area. There are 4 samples of quartz vein but only 2 are eligible to be analyzed and interpreted to represent the temperature of mineralization in the area. Based on the analysis result, we conclude that the temperature of mineralization in the research area is between 231°C – 420°C.