Integration of the Lineament Study in the Karaha-Bodas Geothermal Field, West Java

Abstract

The Karaha-Bodas geothermal field is classified as a hydrothermal volcanic system. This field is characterized by the emergence of manifestations in the form of hot springs, solfatara, steamy soil, and mud pools. The manifestations are spread in the northern part of Karaha and south of Telaga Bodas. Based on the characteristics of the manifestations that appear in Karaha and Telaga Bodas, there are allegations that the Karaha Bodas geothermal system is divided into two systems. The distribution of the Karaha Bodas geothermal system can be estimated through geological studies. In this case, the method used is the integration of the lineament study. A lineament study was carried out applying hillshade from four angles, namely 0°, 45°, 90°, and 135°. The results of the lineament will be mapped into structural lineament density anomalies or Fault Fracture Density (FFD). FFD analysis is then integrated with volcano stratigraphy, gravity anomalies, and MT resistivity. Based on the results of the integration, the Karaha-Bodas geothermal system is estimated to be two systems that are different from the high lineament structure density zone in Karaha.