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Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Published by Pusat Survei Geologi
ISSN : 08539634     EISSN : 25494759     DOI : https://doi.org/10.33332
Core Subject : Science,
Chemistry Earth & Planetary Sciences Energy
The JGSM acts as a publication media of high quality scientific investigations resulted from various geological scientific issues. Published articles covers Geo-sciences, Geo-resources, Geo-hazards, and Geo-environments. Geo-sciences are basic earth sciences in geology, geophysics, and geochemistry. Geo-resources are applied earth sciences scoping in geological resources. Geo-hazards are applied earth sciences concerning in geological hazards. Geo-environments are applied earth sciences focusing in environmental geology.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 5 Documents
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Search results for , issue "Vol. 21 No. 5 (2011): Jurnal Sumber Daya Geologi" : 5 Documents clear
TEKTONO-STRATIGRAFI BAGIAN TIMUR SULAWESI Hermes Panggabean; Surono Surono
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 5 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i5.150

Abstract

Basement rocks of eastern part of Sulawesi, from the East Arm to Southeast Arm, are composed of continental and ophiolite origins, which were collided in latest Oligocene – Middle Miocene. After collision, extention occurred in the area that formed a deepening basin in where Sulawesi Molasse was deposited. Some continental terranes distributed in the eastern Sulawesi, could be derived from northern magin of Australia, and the ophiolite was a part of the Pacific Ocean.Key words: ofiolite, continental terrane, collision and basin
TECTONIC RIFTING OF UPPER PALEOZOIC – MESOZOIC INTRA-CRATONIC BASINS IN THE SOUTHEASTERN GONDWANALAND AND ITS ECONOMIC ASPECTS: with refference to the Geology of North Sumatra and West Australia Amiruddin Amiruddin
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 5 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i5.151

Abstract

Lower Permian fluvio – marine glacial sediments of intracratonic basins of West Australia and these of North Sumatera, West Indonesia in addition paleomagnetic data indicate that the paleo position of all basins were probably in the Southeastern part of Gondwanaland. These are also evidence that during Permian, glaciation had been widespread occur in the part of the land. The occurence of ultrapotassic rocks comprising Permian – Triassic A-type granite (An orogenic-type granite) in north Sumatera terrain and feldspatoid bearing subvolcanics of the Canning Basin, West Australia suggests that a tectonic rifting happened during the time period in the part of that stable continental plate and give way for magmatic emplacemet from lower to upper crusts. Perhaps this rifting had also related to a convergent activity during that time in which proto Pacific Plate move westward and collided or subducted into the eastern part of proto Australia continent moving eastwards and eventually form a Permian-Triassic mobile belt along Eastern Australia known as Tasman mobile belt.Key word: tectonic rifting, intra-cratonic basin, Gondwanaland, Permian – Triassic, North Sumatra, West Australia.
POLIDEFORMASI PADA BATUAN KELOMPOK EMBALUH-RAJANG DI DAERAH BHAYANGKARA, KALIMANTAN TIMUR Joko Wahyudiono; Baharuddin Baharuddin
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 5 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i5.152

Abstract

The Embaluh-Rajang Group in Bhayangkara region had suffered polyphase deformation. Regional fold shown in Landsat Imagery exhibit at least three periodes of deformation on the study area. The first deformation D1 main principal stress (s11) was directed relatively to east-west and resulted regional folds on the north-south direction. The second deformation D2 main principal stress (s12) was directed relatively to northwest-southeast and formed northeast-southwest trending regional folds. The third deformation D3 main principal stress (s13) was directed relatively to east northeast-west southwest and resulted local folds on the north northwest-south southeast trending direction. Faults occurred in study area could be classified into six main groups. They are fault group of A (north-south), B (north northeast-south southwest), C (northeast-southwest) and D (southeast-northwest), E (south southeast-north northwest).Keywords : polydeformation, fold, fault, regional structure
CLEAT CHARACTERISTICS IN TERTIARY COAL OF THE MUARAENIM FORMATION, BANGKO AREA, SOUTH SUMATERA BASIN: Implications for Coalbed Gas Potential Asep Kurnia Permana; Hermes Panggabean
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 5 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i5.153

Abstract

The sub-bituminous coal seams of the Muaraenim Formation commonly overlie claystone, sandstone or shaly siltstone. Coal seams are mostly dull to bright banded lithotype, well developed of cleat system, maceral composition dominated by vitrinite with rare inertinite and minor liptinite and mineral matter. In order to determine cleat systems and a possible relationship with the development of coalbed gas potential within the coal seams, detailed observation on coal seams characteristics, determination and measurement on cleat pattern and orientation, as well an insitu gas in place content measurement (Q1) within the coal measures were performed. Field measurement from outcrops demonstrate well-developed cleat within the coal seams, with high in spacing (∑ 8.93 cm) and moderate in density (0.1512/cm - 0.21/cm) and cleat aperture (1 - 3 mm). SEM analysis provides microcleat characteristics with a rare to medium density. Micro focus observation and examination on microcleat, face microcleats appears to be most prominent compared to butt microcleats. Microcleats also found mostly in open aperture. Gas content of the coal seam indicates a low to moderate methane content, with overall calculation of gas in place from six coal seams around 15.297,73 scf. Moderate level of mineral matter content in coal, as well as an excessive rare of clay minerals infill in microcleat may influence on increasing methane adsorption capacity. Moderate to high density and well continuity of cleat and microcleat could affect enhancing permeability, and plays important role in methane migration and production. Indeed, the coal characteristics and cleat systems of the Muaraenim Formation maybe favorable for coalbed gas potential.Keyword: Coalbed gas, Cleat systems, Muaraenim Formation
PEMATANG PANTAI PURBA SEBAGAI PERANGKAP GAS BIOGENIK DI PESISIR INDRAMAYU PROVINSI JAWA BARAT SUATU KAJIAN PENDAHULUAN H. Kurnio; T. Naibaho
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 5 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i5.154

Abstract

Biogenic gas potency in Indramayu coastal area had been studied by coastal characteristic mapping, soft sediment sampling using specially designed gravity corer and information of gas seeps from local people. The preliminary study was carried out through gatherings of secondary data from many sources which meant to better understand the forms of paleo-dunes in coastal zone of Indramayu surround Cimanuk River deltaic system that already buried subsurface. The study found out that this alternative gas potency is trapped within paleo-beach sand in Indramayu coastal zone. The study also found that the buried beach sand at southeast of Cimanuk River delta's system parallel to northwest-southeast orientation of recent coastline is bearing biogenic gas potency. Based on field observation, the locations of gas seeps take place on the beach sand mentioned. The study also performed utilization of biogenic gas by community south of Indramayu.Key words: paleo-coastal dune, biogenic gas trap, Indramayu coastal zone.

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