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All Journal JFA (Jurnal Fisika dan Aplikasinya)
Suhendra, Suhendra
Universitas Bengkulu
Physics

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Hydrothermal Identification Based on Rock Resistivity Value Using Dipole-dipole Configuration Geoelectric Method In Lemeu Village, Lebong Regency, Bengkulu Province Zamrawi, Ripal; Suhendra, Suhendra; Halauddin, Halauddin; Rendoza, Rendoza; Putri, Aisyah Cindy Phylia; Gumanty, Usman; Setiawan, Wahyu Cahyadi
Jurnal Fisika dan Aplikasinya Vol 20, No 3 (2024)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v20i3.21623

Abstract

Potensi panas bumi identik dengan keberadaan gunung berapi sebagai sumber reservoir, namun sumber hidrotermal jarang ditemukan di tempat yang tidak berasosiasi dengan gunung berapi dan patahan. Salah satu daerah yang terdapat sistem hidrotermal yang berada di Desa Lemeu belum pernah diteliti. Penelitian ini dilaksanakan pada bulan November 2023 dan pengambilan data dilakukan di sekitar sumber air panas Desa Lemeu, Kabupaten Lebong, Provinsi Bengkulu. Penelitian ini menggunakan alat X612-EM VHR MAE MULTICHANNEL Geoelectric RESISTIVIMETER. menggunakan konfigurasi dipol-dipol dengan nilai resistivitas rendah (20,5 Ωm). Nilai resistivitas rendah ini kemungkinan disebabkan oleh sumber hidrotermal. Pada kedalaman 13,4 m, permukaan biasanya didominasi oleh lapisan hidrotermal, sedangkan nilai resistivitas yang relatif tinggi yaitu 8525 Ωm kemungkinan merupakan batuan keras. Berdasarkan hasil interpretasi penampang resistivitas 2D, terdapat sebaran hidrotermal pada garis survei di Desa Lemeu. Air panas tersebut diduga keluar ke permukaan melalui retakan batuan di bawah permukaan. Sehingga air panas mengalir melalui patahan-patahan di dekat daerah tersebut. Suhu udara di daerah tersebut sekitar 30˚-40˚ C. Karena patahan-patahan di sekitarnya cukup jauh, maka udara di daerah tersebut merambat ke permukaan dari patahan terdekat.
IDENTIFICATION OF AREAS AT RISK OF ABRASION APPLICATION OF ELECTRICAL RESISTIVITY TOMOGRAPHY (ERT) METHOD ON NANGAI BEACH, NORTH BENGKULU Saputra, Bayu; suhendra, Suhendra; Halauddin, Halauddin; lidiawati, Liza; Marcelina, Shyaira
Jurnal Fisika dan Aplikasinya Vol 21, No 3 (2025)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v21i3.22007

Abstract

A study of the underground structures in areas prone to abrasion of Nangai Beach, North Bengkulu Regency. In this study, 2D images of the subsurface structure at the Nangai Beach site were obtained using the Wenner-Schlumberger configuration, while 3D representations were obtained using the electrical resistivity technique (ERT). To protect coastal materials, the main objective of this research is to identify rock types that are resistant to seawater erosion and measure the resistivity of rocks that can be eroded. In addition, software (ERT LAB 64, View Lab 3D and Res2Dinv) was used to analyze the data by processing it and displaying an image of the resistivity value. The interpretation results show that the coastal zone of the study area is dominated by clays with resistivity (>34 Ωm). The shoreline of Nangai beach consists of shale clay (>> 437 Ωm). Rocks having a resistivity value (437 Ωm) are not easily eroded by erosion in shale clay. This is because the rocks known as shale clay have low porosity, resulting in compact rock density. Restoring damaged soil and planting trees near the coast are two ways to slow down the abrasion process. Keywords: Abrasion, Electrical Resistivity tomography (ERT), 2D/3D, Nangai Beach
Co-Authors Gumanty, Usman Halauddin, Halauddin lidiawati, Liza Marcelina, Shyaira Putri, Aisyah Cindy Phylia Rendoza, Rendoza Saputra, Bayu Setiawan, Wahyu Cahyadi Zamrawi, Ripal