TWO-DIMENSIONAL INVERSION MODELLING ANALYSIS FOR SUBSURFACE INTERPRETATION OF TANGKUBAN PARAHU AREA BASED ON GRAVITY METHOD.
The Tangkuban Parahu volcanic area is a geothermal prospect area in Bandung, West Java. The geothermal potential can be identified from the subsurface structure of the field. One of the geophysical methods that can be used in geothermal exploration is the gravity method. The ability of the gravit...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/70338 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The Tangkuban Parahu volcanic area is a geothermal prospect area in Bandung,
West Java. The geothermal potential can be identified from the subsurface structure
of the field. One of the geophysical methods that can be used in geothermal
exploration is the gravity method. The ability of the gravity method to find values
of rock density variations below the surface can be used to identify structures that
control geothermal systems. In this research, the processing and interpretation of
gravity data have been carried out with 42 measurement points. Gravity data
processing is done by taking into account all correction factors to obtain the
complete Bouguer anomaly value. Based on the interpretation of the complete
Bouguer anomaly (CBA) contour map, it is determined that the information on the
range of gravity anomaly values in the research data acquisition area is in the
interval 370.7 mGal–391.8 mGal. The complete Bouguer anomaly map that has
been obtained from field data processing is then subjected to a spectrum analysis
process to determine the estimated depth and data filtering using the Butterworth
filter to separate regional and residual anomalies. In addition, 2D inversion
modeling is used to determine the distribution of gravitational anomalies, and 2D
forward modeling is used to interpret subsurface structures in the study area. From
the results of data interpretation, it can be concluded that the research area has
geothermal potential. This is indicated by the presence of subsurface structures that
show areas with low gravity anomaly values that are indicated as a potential source
of geothermal heat located in the northeast and associated with the existence of
geothermal manifestations around the research area in the form of Ciater hot
springs. |
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