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"Aktivitas geotermal pada daerah X telah ditemukan melalui keberadaan manifestasi panas bumi yang sangat impresif di beberapa titik. Beberapa penelitian yang dilakukan di daerah ini bertujuan untuk menemukan lokasi dan karakteristik reservoir utama sistem geotermal yang ada di area prospek. Namun, beberapa hasil interpretasi yang ditemukan ambigu dikarenakan penggunaan metode survei yang tidak tepat. Dalam penelitian ini, model konseptual yang terintegrasi dari metode magnetotellurik, geokimia, dan geologi digunakan untuk mendelineasi zona reservoir, karakteristik fluida reservoir, dan temperatur reservoir. Berdasarkan hasil konstruksi model konseptual, reservoir sistem geotermal di daerah penelitian ini ditemukan menggunakan metode magnetotellurik berada tepat di bawah tubuh gunung A. Keberadaan manifestasi fumarol di puncak gunung A, tepatnya di kawah gunung A yang mengalami perluasan ke arah timur laut dan sebagian ke arah barat laut, memvalidasi hasil ini. Temperatur pada reservoir mencapai 310°C, dengan sumber panas yang berasal dari gunung A muda. Area prospek diperkirakan sekitar 24 km dengan top of reservoir pada elevasi 1000 meter. Berdasarkan hasil ini, pengeboran eksplorasi dengan tipe sumur standard hole direkomendasikan untuk memvalidasi hasil eksplorasi 3G (geofisika, geokimia, geologi), yang akan ditajak pada kedalaman 2000 meter.

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Geothermal activity in area X has been identified through the presence of impressive manifestations of geothermal activity at several points. Several studies conducted in this area aimed to locate and characterize the main reservoir of the geothermal system present in the prospect area. However, some of the interpreted results were ambiguous due to the improper use of survey methods. In this study, a conceptual model integrated from magnetotelluric, geochemical, and geological methods was used to delineate the reservoir zone, fluid reservoir characteristics, and reservoir temperature. Based on the constructed conceptual model, the geothermal reservoir system in this study area was found to be located precisely beneath the base of Mount A using the magnetotelluric method. The presence of fumaroles at the summit of Mount A, specifically in the Kawah Mount A, which is expanding towards the east-northeast and west-northwest, validates these results. The reservoir temperature reaches 310°C, with the heat source originating from the young Mount A. The prospect area is estimated to be approximately 24 km with a top of reservoir at an elevation of 1000 meters. Based on these results, drilling exporation with a standard hole type is recommended to validate the 3G exploration results (geophysics, geochemistry, geology), which will be drilled to a depth of 2000 meters."

"Pusuk Buhit adalah salah satu lapangan di Indonesia dengan potensi geotermal, dibuktikan oleh keberadaan fumarole, hot spring, dan cold spring. Penelitian bertujuan membangun model konseptual yang menggambarkan komponen-komponen sistem geotermal fokus wilayah penelitian yang belum ada sebelumnya, menggunakan data primer geofisika dan data sekunder geologi dan geokimia. Inversi 3-dimensi magnetotellurik mampu menggambarkan komponen sistem geotermal dari variasi resistivitas. Claycap memiliki resistivitas 0-16 Ωm, reservoir 16-80 Ωm, dan basement 80-300 Ωm, dengan pola updoming di antara basement diduga sebagai sumber panas. Model gravitasi 2-dimensi digunakan untuk mengkonfirmasi jalur fluida ke zona reservoir dan nilai densitas dari komponen sistem geotermal, dengan lapisan piroklastik densitas 1.92 gr/cc, batuan gamping 2.3-2.4 gr/cc, dan batuan dasar metamorf 2.7 gr/cc, yang menunjukkan korelasi dengan model magnetotellurik. Kedua metode didukung data geologi yang menunjukkan korelasi antara struktur dengan manifestasi permukaan, serta data geokimia yang menunjukkan fluida reservoir bertipe bikarbonat, suhu di reservoir 240-270°C, dan pergerakan fluida lateral ke arah manifestasi air, serta upflow menuju fumarole. Integrasi data menunjukkan area prospek geotermal berada di bawah lapisan batuan teralterasi konduktif di antara struktur graben wilayah penelitian.

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Pusuk Buhit is one of the fields in Indonesia with geothermal potential, evidenced by the presence of fumaroles, hot springs, and cold springs. The research aims to build a conceptual model depicting the components of the geothermal system in the focus area, which has not been previously studied, using primary geophysical data and secondary geological and geochemical data. The 3-dimensional magnetotelluric inversion can illustrate the geothermal system components based on resistivity variations. The clay cap has a resistivity of 0-16 Ωm, the reservoir 16-80 Ωm, and the basement 80-300 Ωm, with an updoming pattern within the basement suspected to be the heat source. A 2- dimensional gravity model is used to confirm fluid pathways to the reservoir zone and the density values of the geothermal system components, with pyroclastic layers having a density of 1.92 gr/cc, limestone 2.3-2.4 gr/cc, and metamorphic basement rocks 2.7 gr/cc, which show correlation with the magnetotelluric model. Both methods are supported by geological data showing a correlation between structures and surface manifestations, as well as geochemical data indicating bicarbonate-type reservoir fluids, reservoir temperatures of 240-270°C, lateral fluid movement towards water manifestations, and upflow towards fumaroles. Data integration indicates that the geothermal prospect area is located beneath the conductive altered rock layer within the graben structures of the study area."