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All Journal Journal Geological Processes, Risks, and Integrated Spatial Modeling
Masulili, F.
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Energy Engineering Environmental Science

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TEKTONIK GEOMORFOLOGI SESAR-SESAR YANG DIDUGA AKTIF DI DAERAH HILIR SUNGAI BONE, GORONTALO Masulili, F.; Djaya, A. E. P.; Walukow, J. L.; Bolung, R. Y.; Gafur, N. A.
Journal Geological Processes, Risks, and Integrated Spatial Modeling Vol 1 No 2 (2023): JGPRISM: Journal Geological Processes, Risks and Integrated Spatial Modeling
Publisher : LPPM Universitas PRISMA

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Abstract

The downstream area of ​​the Bone River is the center of government, economy and settlement in Gorontalo Province. This area is located in the North Arm of Sulawesi which is tectonically and seismically active and is directly influenced by the Sangihe Tunjaman in the eastern partand Tunjaman Sulawesi in the north. However, information regarding active faults in disaster mitigation efforts is still very minimal. For the first time, we have mapped active faults around the lower reaches of the Bone River based on morphometric interpretation protection index red relief image map (MPI-RRIM). The Pancuran normal fault and the Bondawuna normal fault on the south side show this evidence of Quaternary activity, compared to the normal Lombongo fault on the north side. Based on the empirical relationship between moment magnitude and length of surface cracks, these faults have the potential to produce earthquakes of 6.3 ~ 6.7 Mw. Besides Therefore, our research found that the flood disasters that often hit this area are not only influenced by climate and urbanization, but also controlled by tectonic activity. Understanding active cesarean delivery is very important in improving education community related to disasters, and also as basic information in regional development planning.
GEOLOGI DAERAH ALASON DAN SEKITARNYA, KECAMATAN RATATOTOK, KABUPATEN MINAHASA TENGGARA, SULAWESI UTARA Najoan, A.D.; Masulili, F.
Journal Geological Processes, Risks, and Integrated Spatial Modeling Vol 2 No 1 (2024): Journal Geological Processes, Risks, and Integrated Spatial Modeling
Publisher : LPPM Universitas PRISMA

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Administratively, the research area is located in Ratatotok District, Minahasa Tenggara Regency, North Sulawesi. Geographically, the research area is situated at UTM (Universal Transverse Mercator) coordinates 51N between 687000-691000 meters easting and 98000-102000 meters northing, covering an area of 4 x 4 square kilometers (16 km²). The objective of this research is to understand the geomorphology, stratigraphy, geological structure, and geological history of the study area. The geomorphology of the research area consists of four geomorphological units: Karst hill unit, Karst plain unit, Intrusive hill unit, and Alluvial plain unit. The stratigraphy of the study area comprises three rock units arranged from oldest to youngest: Crystalline Limestone unit, Porphyritic Andesite unit, and Alluvial Deposit unit. The geological structure in the study area includes fractures oriented generally northwest to southeast and a suspected uplift fault. The geological history of the study area began in the early Miocene epoch with the deposition of the Crystalline Limestone unit, followed by the emplacement of hypabyssal intrusions forming the Porphyritic Andesite unit during the early to middle Miocene epoch. In the Holocene epoch, alluvial units were deposited non-conformably, accompanied by erosion processes shaping the morphology of the study area, which continue to the present day.
Co-Authors Bolung, R. Y. Djaya, A. E. P. Gafur, N. A. Najoan, A.D. Walukow, J. L.