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All Journal Journal Geological Processes, Risks, and Integrated Spatial Modeling OPHIOLITE : Jurnal Geologi Terapan
Masulili, Febryanto
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Earth & Planetary Sciences Energy Engineering Environmental Science

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Pengembangan Berkelanjutan Kawasan Karst sebagai Kawasan Hutan Konservasi: Pendekatan Potensi Geologi di Daerah Ratatotok, Sulawesi Utara Rachmadhan, Harman; Masulili, Febryanto; Najoan, Alvaro; Janis, Regina; Pesik, Gresyella
OPHIOLITE: Jurnal Geologi Terapan Vol 6 No 2 (2024): OKTOBER 2024
Publisher : Universitas Halu Oleo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56099/ophi.v6i2.p53-63

Abstract

The development of the karst region in Ratatotok, North Sulawesi, requires an integrated geological approach for effective conservation forest management. This research utilizes geospatial analysis and geological mapping to understand the geological dynamics and geohazard potential in the area. Six main rock units were identified: Andesite-Basalt Lava, Marl Limestone, Crystalline Limestone, Basalt Breccia, Sandstone, and Alluvial Deposits. The complex geological structures, including fractures and faults with a main orientation of Southeast-Northwest, reflect the regional tectonic influence from the subduction between the Pacific Plate and the Indo-Australian Plate, specifically the Molucca Sea Plate. Drainage pattern maps reveal two main flow directions influenced by the structures, with intense erosion. The geomorphological map depicts four primary landforms: Denudational Karst Slopes, Denudational Hills, Karst Alluvium Plains, and Karst Valleys, reflecting karst activity in the landscape. The geohazard risk map shows potential geohazards such as landslides, rock falls, and subsidence, indicated based on the overlay of lithology, slope, and geological structures. Forest conservation and ecotourism in this area offer opportunities, with karst caves as a major attraction. Ecotourism management must adhere to sustainability principles to prevent environmental damage. Management strategies include establishing tourism and conservation zones and involving local communities in sustainable management. Partnerships with stakeholders and routine monitoring are crucial for the success of conservation and development in the Ratatotok karst area.
GEOWISATA PULAU MANADO TUA, PULAU BUNAKEN DAN PULAU SILADEN DI KAWASAN TAMAN NASIONAL BUNAKEN, KOTA MANADO, PROVINSI SULAWESI UTARA. Djaya, Andika; Masulili, Febryanto
Journal Geological Processes, Risks, and Integrated Spatial Modeling Vol 3 No 1 (2025): Journal Geological Processes, Risk and Integrated Spatial Modeling
Publisher : LPPM Universitas PRISMA

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ABSTRACT: Geotourism is nature tourism to invite tourists to see geological phenomena and find out how these phenomena occur around us. Packed with several other aspects, such as: geological diversity, biological diversity and cultural diversity, so that geotourism has the best development potential in supporting tourism by prioritizing the principle of protection (conservation) of nature for the sustainability of the ecosystem. This research was conducted with three methods, namely the literature study stage, the field research stage, and the geosite and geodiversity site inventory stage based on the technical guidelines for the assessment of geological heritage resources where the scoring method was proposed by J, Brilha (2016). The parameters used are the assessment of scientific values, educational values, tourism values, and the risk of degradation and added value owned by a geosite. From the results of research on the three islands, 4 geosites and geodiversity sites were found, namely, Bunaken Pyroclastic Cliffs, Contact Pyroclastic Cliffs with Bunaken Limestone, Old Manado Lava Flow, and Bunaken Reef Limestone Cliffs. In addition to these geosites, caves, other beaches that can be potential geodiversity sites. Thus the Bunaken National Park area has the potential to become a geotourism object with assessment aspects based on the quantitative value of various natural beauties and geological processes that control the formation of the geotourism object. To increase the potential of geotourism, infrastructure development and good promotional planning are needed so that it can become a leading tourist location in Manado City.
“GEOLOGI DAERAH BAILANG DAN SEKITARNYA, MANADO PROVINSI SULAWESI UTARA” Dote, Mesak; Masulili, Febryanto
Journal Geological Processes, Risks, and Integrated Spatial Modeling Vol 3 No 1 (2025): Journal Geological Processes, Risk and Integrated Spatial Modeling
Publisher : LPPM Universitas PRISMA

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Abstract

This study aims to understand the geological conditions of the Bailang area and its surroundings, located in Bunaken District, Manado City, North Sulawesi Province, through surface geological mapping at a 1:25,000 scale. The methods used include direct observation, field measurement, and analysis of geomorphology, stratigraphy, geological structure, and geological history. The study area is situated at coordinates 1˚33ˈ54.98˝ N and 124°50ˈ42.87˝ E, covering an area of 49 km². The geomorphology of the study area is divided into six subunits: Residual Hills, Isolated Hills, Dissected Volcanic Hills, Volcanic Foot, Volcanic Footplain, and Volcanic Fluvial Plain. The geological structure analysis reveals the presence of primary structures with a dominant northwest–southeast orientation. The stratigraphy consists of four rock units: the Pandu–Molas Andesite Lava Unit (Pleistocene–Holocene), the Molas Breccia Unit (Pleistocene), the Bailang Tuff Unit (Quaternary), and the Alluvial Unit (Holocene). These units formed through four geological phases reflecting volcanic activity from Mount Tumpa and fluvial sedimentation processes. The research outcomes include geological, geomorphological, and traverse maps that illustrate the geological framework of the area. This information is expected to support a deeper understanding of the regional geological evolution of North Sulawesi and provide valuable insights for spatial planning and local natural resource management. Keywords: geological mapping, geomorphology, stratigraphy, geological structure, Bailang.
Co-Authors Djaya, Andika Dote, Mesak H.D. Rachmadhan Janis, Regina Najoan, Alvaro Pesik, Gresyella