Abstract
Bayah is an area with complex geology located administratively in Lebak District, Banten Province, approximately 80 kilometers at the southwest of Jakarta. In this area, four geothermal manifestations were found in the form of four hot, also 139 soil samples were sampled. This study aims to determine the non-volcanic geothermal potential of the Bayah area. The method used in this research is analysis of fluids geochemistry that is determine type of fluids, origin of fluids, and fluids maturity, Also the calculation of the estimated reservoir temperature. After that, a map based on soil chemistry data which are Hg distribution anomalies in the soil is made.. Analysis of Fault and Fracture Density were also carried out to determine the fracture density developed in the study area. The result of this geothermal prospecting zowere collected to produce the real prospect area. The result of this study shows that the geothermal prospect zone in the Bayah region is located e in the southeast of the research area, precisely around theAPPC-1, APPC-2, and APPC-3 manifestations, having an area of about 3,3 km2. Based on the geothermometer calculation, geothermal potential of Bayah area has medium enthalpy with reservoir temperature around 138-165 °C. The resources calculated in this study were 33 MWe.
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