ANALYSIS OF SUBSURFACE STRUCTURE OF GEOTHERMAL POTENTIAL AREA BASED ON GRAVITY DATA

• Main Author: Rikli Firejeki, Wardani
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/57727
• Institution: Institut Teknologi Bandung

The more advanced human life, the increasing demand for energy. Currently, fossil energy is the main energy used by Indonesia. Fossil energy is non-renewable so that over time its availability is running low. Therefore, alternative energy is needed so that the need for energy can still be met. Geothermal energy is a renewable energy that can be used as an alternative energy. The existence of Indonesia in the volcanic route causes Indonesia to have a large geothermal potential but has not been utilized optimally. To utilize geothermal energy, geophysical exploration is needed, one of which is the gravity method. The gravity method can be used to determine subsurface structures based on variations in density and rock types. This study was conducted to determine the subsurface structure of the research area which is indicated to have geothermal potential. The data obtained are 475 points with an area of about 1089 m2. The data processing stage includes gravity corrections, complete bouguer anomaly separation with moving average method, and 2D forward modeling is used to provide information on subsurface structures. From the interpretation results, it can be concluded that the research area has geothermal potential. The subsurface structure shows the existence of a geothermal system which is characterized by low anomalies which are located in the center of the study area.