DATA PROCESSING AND SUBSURFACE INTERPRETATION USING GRAVITY DATA OF THE KAMOJANG GEOTHERMAL FIELD, GARUT, WEST JAVA
The Kamojang geothermal field, located in Garut Regency, West Java, is an area with high geothermal potential, characterized by the frequent occurrence of hot springs and fumaroles. This study aims to develop a detailed subsurface model of the geothermal system in this region. Utilizing gravity...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/85469 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The Kamojang geothermal field, located in Garut Regency, West Java, is an area with high
geothermal potential, characterized by the frequent occurrence of hot springs and fumaroles.
This study aims to develop a detailed subsurface model of the geothermal system in this region.
Utilizing gravity data from the Exploration Geophysics Laboratory at the Bandung Institute of
Technology (ITB), collected in 2006, we constructed an accurate Complete Bouguer Anomaly
map, employing an average density derived from the Parasnis method of 2.56 g/cc. The
Complete Bouguer Anomaly values for Kamojang range from 22.5 mGal to 35.5 mGal. In
analyzing this data, we applied a separation technique using a Moving Average filter to
distinguish regional and residual anomalies. Derivative analysis using the FHD (First
Horizontal Derivative) and SVD (Second Vertical Derivative) methods revealed the presence
of significant fault structures oriented Southwest-Northeast. Two of the three transects from
the derivative analysis indicated the presence of normal faults, while the other transect
indicated a reverse fault. The fault structures identified through derivative analysis are
consistent with the findings from the residual anomaly map and the geological map |
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