Study of Hydrothermal Alteration Based on Analysis of X-Ray Diffraction at Cisolok Geothermal Area, Sukabumi District, West Java

Abstract

Cisolok geothermal area, Sukabumi District, West Java, Indonesia is an area having quite potential geothermal reserve. Several studies has been carried out in the area, from geology, geochemistry as well as geophysical study and analysis. A geochemical study has been performed by conducting hydrothermal alteration studies that has been carried out using X-Ray Diffraction and petrographic analysis. The study was performed by field mapping and rocks as well as fluids sampling. Further, the lab analysis was performed on 16 rock samples from 77 observation locations. The analysis results show there are two alteration hidrotermal zones in this research area: epidot-chlorite-illite-smectite-quartz-calcite zone and smectite-illite-kaolinite-calcite zone.