Rasimeng, Syamsurijal and Tarigan, Jaka Sura and Fadhillah, M. Ikhsan and Arlinsky, Ditha (2019) Integrating of Geomagnetic Data and Vertical Electrical Sounding for Identification of Reservoir and Geothermal Fluids in Geothermal Prospects Rajabasa Mountain. In: The 7th Indonesia International Geothermal Convention & Exhibition (IIGCE) 2019, 13-15 Agustus 2019, Jakarta Convention Center.

2019 IIGCE Integrating of Geomagnetic Data.pdf

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This study has been done to determine the spread of reservoir rocks and geothermal fluids that are beneath the surface of the geothermal prospect of Mount Rajabasa, South Lampung Regency, Lampung Province. The stages of study carried out in the form of (i) measurement of geomagnetic data and vertical electrical sounding AB/2 150, 300, 450 and 600 meters; (ii) magnetic anomaly data processing consisting of diurnal and IGRF correction, reduction of the surface, upward continuation, separation of regional-residual anomalies, reduction to the pole, and 3D residual anomalies modeling from reduction to the pole; (iii) determining the value of resistivity every depth. The range of geomagnetic anomalies obtained is -419.404 nT to 1429.022 nT. Based on the results of 3D residual anomalies from reduction to the pole process can be estimated that the geothermal reservoir has a susceptibility value of 0.0022 cgs (103 SI) to 0.289 cgs (103 SI) estimated as intermediate (andesitic-basaltic) rocks. The position of the reservoir is located southwest of the peak of Mount Rajabasa at a depth of 1300 meters below the mean sea level. The results of resistivity analysis showed that the capillary rock was characterized by a low resistivity value (10 - 60 Ωm) and a geothermal reservoir characterized by a high resistivity value (> 210 Ωm). Based on the profile of resistivity anomaly there is a distribution of geothermal fluid from the Northwest and extends with increasing depth. The cross section of the geomagnetic anomaly shows that the geological structure that traverses Northeast - Southwest and North-South is a fluid control factor in the area of the prospect of the Gunung Rajabasa geothermal, South Lampung Regency, Lampung Province.

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TN Mining engineering. Metallurgy
Divisions: Fakultas Teknik (FT) > Prodi Teknik Geofisika
Date Deposited: 08 Jun 2021 04:19
Last Modified: 08 Jun 2021 04:19
URI: http://repository.lppm.unila.ac.id/id/eprint/32277

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