Analisa Geoelectrical Strike Metode AMT untuk Identifikasi Awal Potensi Sistem Panas Bumi di Daerah Gunung Pancar Bogor Jawa Barat

Hidayat, Wahyu; Hamdalah, Hafiz; K, Hana Aulia

doi:10.30588/jo.v3i1.487

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“…Preliminary geothermal survey activities at the Mount Gede Pangrango prospect were carried out by PT Pertamina (Persero) in 2013 [2]. Several researchers have also conducted further geothermal investigations/research in the prospect area of Mount Pancar including [5], [6], [7], [8], and [9]. Meanwhile, recently, [10] conducted one of the advanced geothermal investigations regarding geothermal geochemical and hydrogeological studies in Mt.…”

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confidence: 99%

Upflow-outflow Zone Identification Based on Geochemistry Indicator and Fault Fracture Density Correlation Analysis in Mt. Gede Geothermal Case, West Java

Nayoan

Pranatikta²,

Anil³

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Upflow and outflow zones in a geothermal field are very important to identifying. These two zones are very useful in running a geothermal project such as simply in determining the drill point. Mt. Gede-Pangrango is one of the interesting geothermal fields in West Java province and is still included in the category the geothermal fieldwork (WKP) has not been further investigated which is the current research area especially on Mt. Gede. The method used to identify upflow-outflow zones is to correlate fault fracture density (FFD) analysis and geochemistry indicators with the early hypothesis that the geothermal upflow zone in the Mt. Gede is most likely located in the crater area to the volcanic body. Based on the FFD analysis, areas with high density of structural lineaments with a value of >2 km/km2 tend to have a southwest-northeast pattern that describes the direction of geothermal fluid flow due to the presence of a permeable zone (fracture) from the crater area of Mt. Gede (upflow zone) towards the foot of the mountain (outflow zone) the Cipanas area, which is also supported by the presence of the bicarbonate hot spring manifestation in the area. Then based on the geochemistry indicator (HCO3/SO4, Na/K, CO2 /H2S, and Isotope 18O), it can be seen that the upflow area is in the area of the volcanic peak to the body of the volcano and the outflow is at the foot of the volcano (Cipanas Area). From these two analyzes, it can be seen that the FFD and geochemical indicators are very well correlated in identifying the upflow and outflow zones of Mt. Gede and answered the early hypothesis that the upflow area tends to be in the volcanic crater area to the volcanic body of Mt. Gede.

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