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All Journal Buletin Sumber Daya Geologi Jurnal Fisika
Gea, Jessica Agnes Soroinama
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Education Energy Engineering Environmental Science Physics

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DELINEASI PROSPEK PANAS BUMI DI KAWASAN WISATA AIR PUTIH KABUPATEN LEBONG BENGKULU MENGGUNAKAN METODE MAGNETOTELURIK : GEOTHERMAL PROSPECT DELINEATION STUDY IN AIR PUTIH TOURISM AREA LEBONG DISTRICT BENGKULU USING MAGNETOTELLURIC METHOD Della Zakia Soleha; Farid, Muchammad; Refrizon; Maesaroh, Rina; Hardianza, Meno; Hasugian, Basdiki; Gea, Jessica Agnes Soroinama; Al Ansory, Andre Rahmat
Buletin Sumber Daya Geologi Vol 20 No 1 (2025): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v20i1.488

Abstract

Geothermal energy is renewable and can be used as an energy reserve in the future. This research aims to determine locations that have geothermal potential in the Air Putih Tourism area, Lebong Regency, Bengkulu Province based on resistivity values using the magnetoteluric method. The resistivity values obtained vary from low, medium, and high which can be used as a reference to describe subsurface conditions. In this data acquisition, measurements were made using the ADU-07e Magnetotelurik tool which has a measurement time of 16 hours with a low frequency bandwidth of 128 Hz, a medium frequency bandwidth of 1024 Hz, and a high frequency bandwidth of 4096 Hz. The sensor in the recording has two sensors: a magnetic sensor and an electrical sensor. The magnetic sensor consists of 3 sensors/coils (Hx, Hy, and Hz), while the electrical sensor uses 4 orthogonally placed pot shafts (Ex and Ey). Based on the results of data processing using the Magnetoteluric method with ZondMT software, there is a range of resistivity values of 10-700 (Ωm) which provides information on the structure of the subsurface layer. Layers with low resistivity (18-30 Ωm), medium resistivity (40-160 Ωm) and the highest resistivity (>300 Ωm).
Magnetic Anomaly Model Interpretation of Geothermal Area in Air Putih Region, Lebong District, Bengkulu Province Gea, Jessica Agnes Soroinama; Refrizon; Halauddin; Purwanto, Eko Heru; Sari, Widya Kurnia; Rizki, Juni Putri
Jurnal Fisika Vol. 14 No. 2 (2024): Jurnal Fisika 14 (2) 2024
Publisher : Universitas Negeri Semarang

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Abstract

Lebong Regency is located in the Sumatra Fault Zone, a relatively long dextral shear fault, causing unique structural and morphological changes around the fault zone. The Air Putih area, Lebong Regency, has geothermal manifestations in the form of hot springs that gush and flow from river banks and cliffs. In determining the subsurface structure model, magnetic anomalies were interpreted from direct measurements using two sets of Proton Precession Magnetometers (PPM) as the base and rover. The magnetic method was used to identify the subsurface structures displayed in a 2D model. The results of magnetic anomaly mapping in the study area show that 2D modelling can provide an overview of objects or rocks that cause anomalies at the study site. Based on subsurface modeling at the research site, four incisions were made, namely incisions A-A’ with a susceptibility contrast value of 0.516042 SI with hematite mineral type; in incisions B-B', it is suspected that is a mineral, namely gneiss with a susceptibility value of 0.164160 SI; incision C-C' has a susceptibility value of  0.172010 SI with gneiss rock type; and incision D-D' has a susceptibility value of 0.060604 SI, which is suspected to be a pyrite mineral. The rock types in the study area are mainly thought to be gneiss igneous rocks and the magnetic minerals quartz, pyrite, and calcite, which have different susceptibility values.
Co-Authors Al Ansory, Andre Rahmat Della Zakia Soleha Farid, Muchammad Halauddin Hardianza, Meno Hasugian, Basdiki Maesaroh, Rina Purwanto, Eko Heru Refrizon Rizki, Juni Putri WIDYA KURNIA SARI, WIDYA KURNIA