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All Journal PROMINE OPHIOLITE : Jurnal Geologi Terapan
H.D. Rachmadhan
Departemen Teknik Geologi, Fakultas Sains Dan Teknologi, Universitas Prisma. Manado, Sulawesi Utara
Earth & Planetary Sciences Engineering Environmental Science

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Geologi Dan Pengaruh Struktur Geologi Terhadap Kualitas Batubara pada Satuan Batupasir Kampungbaru Daerah Mutiara dan Sekitarnya Kecamatan Samboja Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur Ridho Muhari; Ediyanto Ediyanto; Harman Dwi R
PROMINE Vol 4 No 2 (2016): PROMINE
Publisher : Jurusan Teknik Pertambangan, Fakultas Teknik, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (771.633 KB) | DOI: 10.33019/promine.v4i2.107

Abstract

Study area is located in Mutiara and surrounding area, Samboja District, Kutai Kartanegara Regency,East Kalimantan Province. At coordinates 0° 56’ 43’’ - 0° 59’ 26’’ South Latitude and 117° 1’ 37’’ - 117°3’ 46’’ East Longitude or UTM N 9890500 - 9895500 and E 503000 - 507000. The objective of thisstudy is to identify geological conditions and the influence of geological structure toward to quality ofcoal in the study area. The stratigraphy of study area composed by 3 rock units and 1 unconsolidatedfrom old to young are Balikpapan sandstone unit (Middle Miocene - Late Miocene) deposited in LowerDelta Plain, Kampungbarusandstone unit (Late Miocene - Pliocene) deposited in Lower Delta Plain,and Quarter Alluvial (Holocene). From proximate analyses, coal seam Kampungbaru Sandstone Unitcontain low sulfur and low calories, and high total moisture due to presence of two normal faults fromsubsurface interpretation that formed simultaneously with peatification process on coal seamKampungbaru Sandstone unit. Those normal faults resulted water increase on peatificationenvirontment that caused aerobic bacteria can not completely ondestruction of plant components thatwill form high sulfur and low calories and high total moisture.
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.
Co-Authors Ediyanto Ediyanto Janis, Regina Masulili, Febryanto Najoan, Alvaro Pesik, Gresyella Ridho Muhari