Identifying Non-Volcanic Geothermal Potential in Amohola, Southeast Sulawesi Province, by Applying the Fault and Fracture Density (FFD) Method

Abstract

Indonesia has numerous volcanic areas that lead to a significant geothermal potential. The geothermal potential could be produced by volcanic and non-volcanic processes. To date, geothermal possibilities by volcanic process are the most commonly known and explored in several areas in Indonesia, whereas, geothermal potential by non-volcanic process is rarer. Therefore, Indonesia is likely has a promising non-volcanic geothermal also. Non-volcanic geothermal systems could be identified by using Fault and Fracture Density (FFD) method, lineaments analysis from SRTM and topography data, as well as using earlier research models by previous researchers. By using those methods, the existing of fractures and possibility level of area that being recharge and discharge zones for geothermal might be predicted. Thus, the result could be the next target of exploration. This paper describes the application of those methods for the Amohola region and surrounding areas in Southeast Sulawesi Province. In general, the study area has complex geological characteristics. Consequently, the methods could be applied to identifying the presence of non-volcanic geothermal system in this study area.