PROCESSING AND INTERPRETATION OF GRAVITY DATA DERIVATIVE ANALYSIS IN THE LAINEA GEOTHERMAL FIELD, SOUTH KONAWE, SOUTHEAST SULAWESI
The Lainea geothermal field in Southeast Sulawesi features extensive metamorphic rocks intruded by aplite and diabase, suggesting a basement rock origin. The region's tectonic activity offers strong potential for geothermal development, with the system classified as a "heat sweep"...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/84777 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | The Lainea geothermal field in Southeast Sulawesi features extensive metamorphic
rocks intruded by aplite and diabase, suggesting a basement rock origin. The
region's tectonic activity offers strong potential for geothermal development, with
the system classified as a "heat sweep" driven by crust deformation or plutonic
intrusion. Structural analysis is vital for identifying geological formations affecting
underground water and steam movement, supporting reservoir capacity
assessments and drilling locations. This study uses gravity and elevation data from
PSDG (2010), with Bouguer anomalies ranging from -40 to 59 mGal, trending
southwest-northeast with high anomalies centered in the middle of the Complete
Bouguer Anomaly (CBA) map and extending eastward. The complete Bouguer
anomaly is filtered using a moving average and derivative analysis {First
Horizontal Derivative (FHD), Second Vertical Derivative (SVD), Tilt Derivative
(TDR), Analytic Signal (AS)}. The residual anomaly ranges from -8 to 6.5 mGal,
with derivative analysis results in mGal units ranging from FHD (0 – 0.0028), SVD
(-3.5e-06 – 4.5e-06), TDR (-1.6 – 1.6), and AS (0 – 0.0038), the dominant
lineaments trend northwest-southeast and antithetic southwest-northeast, visible
across most of the map. |
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