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All Journal Jurnal Fisika dan Pembelajarannya Jurnal Sains Dasar Widyariset JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Jurnal Geofisika Widyariset PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Makara Journal of Science Progressive Physics Journal Jurnal Psikologi Poseidon: Jurnal Ilmiah Psikologi dan Psikologi Kemaritiman Jurnal Ilmu Fisika dan Terapannya (JIFTA)
Denny Darmawan
Jurusan Pendidikan Fisika, FMIPA, Universitas Negeri Yogyakarta
Aerospace Engineering Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Neuroscience Physics Social Sciences Other

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Journal : Progressive Physics Journal

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Identifikasi Struktur Bawah Permukaan Area Tempuran, Magelang, Jawa Tengah dengan Metode Gravitasi GGMplus Mustofa, Nisrina Hasna; Widiyansari, Roma; Aziz, Khafidh Nur; Darmawan, Denny; Maharani, Laras Anindita; Zainfa, Aqheela Aphrodita; Fitrianingtyas, Rahmawati; Maulita, Ika
Progressive Physics Journal Vol. 6 No. 2 (2025): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/054gd652

Abstract

This research was conducted in the Tempuran geothermal manifestation area, Magelang, Central Java, specifically in a location with indications of fault structure. The study aims to identify the subsurface structural conditions associated with the fault through the distribution pattern of gravity anomalies. This research used gravity method, with the data are gravity disturbance from GGMplus with a resolution of approximately 220 meters. The gravity disturbance data were processed to obtain Complete Bouguer Anomaly (CBA) data, which were then subjected to upward continuation and forward modeling. The CBA results reveal a high anomaly in the southern part of the study area, extending southwestward, which correlates with the Menoreh Mountains. A low anomaly is found in the northeastern part of the area, corresponding to a lowland region. The 2D modeling results indicate that the study area is composed of rocks with densities ranging from 1.00 g/cm³ to 1.60 g/cm³, interpreted as alluvium; 1.75 g/cm³ to 2.73 g/cm³, interpreted as the Kebobutak Formation; and 2.50 g/cm³, interpreted as deposits from theyoung Sumbing Volcano. Additionally, rocks with densities ranging from 2.40 g/cm³ to 2.77 g/cm³ are interpreted as andesitic intrusions, while rocks with a density of 2.83 g/cm³ are interpreted as dacitic intrusions. The presence of a normal fault is identified within the Kebobutak Formation and the andesitic intrusion, overlain by alluvial deposits.
Analisis Struktur Bawah Permukaan Daerah Panas Bumi Pacitan Berdasarkan Data Gravitasi GGMPlus Widiyansari, Roma; Fatimah, Siti; Risti, Fidel; Hikmah, Nur; Darmawan, Denny; Nur Aziz, Khafidh; Fitrianingtyas, Rahmawati
Progressive Physics Journal Vol. 6 No. 2 (2025): Progressive Physics Journal
Publisher : Program Studi Fisika, Jurusan Fisika, FMIPA, Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/3rdp3n60

Abstract

This study aims to identify the subsurface structure of the geothermal system in the Pacitan area, East Java, using gravity methods based on GGMPlus data. The analysis procedures include terrain correction to obtain the Complete Bouguer Anomaly (CBA), separation of regional and local anomalies through upward continuation, as well as two-dimensional (2D) modeling and Second Vertical Derivative (SVD) analysis to identify fault structure. The CBA values in the study area range from 107 to 115.5 mGal, where high anomalies correlate with volcanic breccia rocks and highlands, while low anomalies indicate the presence of sandstone in lowland areas. Geothermal manifestations in the form of hot springs exhibit gravity anomalies of approximately 110.5–111.5 mGal and are situated in the north of the fault in a northwest–southeast direction. The 2D modeling results reveal the presence of reservoir rocks consisting of sandstone and clay with densities ranging from 1.79 to 2.20 g/cm³, and lava rocks with densities of 2.80–2.90 g/cm³ acting as cap rocks. SVD analysis indicates the existence of a normal fault directly associated with geothermal fluid pathways. This study demonstrates that the GGMPlus gravity method is effective for preliminary exploration of geothermal systems in potential areas such as Pacitan.
Co-Authors A. R. U. Fadilah Adisti, Adisti Agung Purnomo Ahmad Bayhaqi Alfarisa, Suhufa Arya, Lutfi Aziz, Khafidh Nur Bambang Ruwanto, Bambang Desi Novi Dayana Eddy Hermawan Fitrianingtyas, Rahmawati Heningtyas Heningtyas Ika Maulita Kautsar Fadlih Akbar Khikmah Muliati Koji Morita Laatifah, Laatifah Maharani, Laras Anindita Mithra Mustofa, Nisrina Hasna Nugroho Budi Wibowo Nugroho Budi Wibowo Nugroho Budi Wibowo Nugroho Budi Wibowo Nur Aziz, Khafidh Nur Hikmah Nurhayati Nurhayati Petiwi, Gofur Dyah Ayu Gilang R. N. Safitri R. Y. A. Sari R. Yosi Aprian Sari Restu Widiatmono Rida Siti NM Rida Siti Nur’aini Mahmudah Risti, Fidel Rizal Aditya Saputra, Antonni Siti Fatimah Siti Patimah Suparno Suparno Widiyansari, Roma Wipsar Sunu Brams Dwandaru Zahroh Utami Zainfa, Aqheela Aphrodita