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All Journal Jurnal Neutrino : jurnal fisika dan aplikasinya Jurnal Fisika Unand Jurnal Fisika FLUX Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Elemen Jurnal Geofisika Jurnal Engine: Energi, Manufaktur, dan Material JNANALOKA Relativitas : Jurnal Riset Inovasi Pembelajaran Fisika CHEDS: Journal of Chemistry, Education, and Science EINSTEIN (E-JOURNAL) Attadrib: Jurnal Pendidikan Guru Madrasah Ibtidaiyah
Ratni Sirait, Ratni
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Journal : Jurnal Fisika FLUX

 1 
Subsurface Analysis of Sibayak Mountain Karo Regency Using Geomagnetic Method with 2D and 3D Modeling Putri, Nadinda Dwi; Lubis, Lailatul Husna; Sirait, Ratni
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 21, No 2 (2024): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v21i2.17515

Abstract

Mount Sibayak is a quaternary volcano located in the Berastagi area, located in the northern part of the island of Sumatra, approximately 25 km north of Lake Toba. However, the rocks produced are very different from rocks of the same age in Sumatra, Java, and the Toba Tufa. To dig up information about the subsurface structure of the Mount Sibayak area, Karo Regency, use Geophysics. This research uses the geomagnetic method to interpret subsurface layers and rock types based on the intensity of the magnetic field measured at the surface. Measurements were carried out using the PPM GMS 19T (Proton Procession Magnometer) tool by taking data from 51 measurement points with a range of ±10 meters at each measuring point. Data processing begins with IGRF correction, separation of regional and residual anomalies using a bandpass filter, reduction to the poles, and data interpretation. Data modeling uses Oasis Montaj for 2D modeling and ZondGM3D for 3D modeling. The subsurface lithology of Mount Sibayak, Karo Regency, can be seen in the subsurface of the research area. There are two types of rock, namely clay rock as a capping rock, which is altered due to hydrothermal flows with susceptibility contrast values ranging from berkisar  (-10 x 10-3) – (-2 x 10-3) SI and rock andesite intrusions containing hydrothermal fluids with susceptibility contrast values ranging from (35 x 10-3) – (50 x 10-3) SI
Interpretation of Subsurface Structure Based on Magnetic Anomaly Analysis as Geothermal Manifestation in Lake Linting Deli Serdang Sitompul, Yusril Padli; Sirait, Ratni; Lubis, Ridwan Yusuf
Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat Vol 21, No 2 (2024): Jurnal Fisika Flux: Jurnal Ilmiah Fisika FMIPA Universitas Lambung Mangkurat
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v21i2.18592

Abstract

ABSTRACT- Research has been carried out with the aim of determining the type of subsurface lithology of the geothermal area in Lake Linting Deli Serdang, to determine the geological structure, as well as the type of rock that functions as a reservoir for geothermal manifestations. Data processing uses geomagnetic methods with a Proton Precission Magnometer (PPM) model GEM Systems type GSM-19T, starting with IGRF corrections and daily corrections as well as qualitative and quantitative interpretation. Based on 2D modeling of subsurface lithology, the reduction cross-section model to the poles of the A-A' path is dominated by dacite rock with a susceptibility of 0.003 cgs, andesite rock has a susceptibility of 0.006 cgs, and pyroclastic rock has a susceptibility of 0.001 cgs. The reduction cross-section model to the poles of the B-B' path is dominated by pyroclastic rocks with a susceptibility of 0.001 cgs, dacite rocks with a susceptibility of 0.003 cgs, and andesite rocks with a susceptibility of 0.006 cgs. The geological structure based on the pole-reduction cross-section model of the A-A' and B-B' trajectories is characterized by a graph of ups and downs from positive magnetic intensity to negative magnetic intensity, which is estimated to be a normal fault and the rock that functions as a good reservoir is dacite rock, because Dacite rock has good porosity and permeability, so that geothermal heat can be heated and accumulated well, this is based on the fact that it has a low anomaly value with an anomaly value of -44 nT. This rock is a type of volcanic igneous rock that makes up the geothermal reservoir zone
Co-Authors Angga Wijaya, Angga Anggraini, Delfira Anisa, Hilwa Ariska, Sri Fuji Azmi, Afifah Fazira, Era Harefa, Faradilla Firdani Jumiati, Ety Kaban, Ela Widiarty Lubis, Lailatul Husna Lubis, Rahmadhani Lubis, Ridwan Yusuf Mahyuda, Maulana Masthura Masthura, Masthura Miftahul Husnah Nabilah, Cinthia Farah Nasution, Fajar Siddik Nasution, Nazaruddin Ningsih, Mulia Noveni, Tasya Ong, Russell Putri, Nadinda Dwi Rahma, Sauma Natia Rani Saputri Razzaaq, Muhammad Rian Pratama Sagala, Junaina Sahputri Sari, Sindi Puspita Sibuea, Christofel Haposan Great Siti Munawaroh Siti Putri Masyitah Sitompul, Yusril Padli Suastika, Rima