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Sekretariat Redaksi Jurnal Geologi dan Sumberdaya Mineral Pusat Survei Geologi, Badan Geologi, Gedung A, Lantai 1 Jalan Diponegoro No. 57, Bandung, Indonesia
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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 482 Documents
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IDENTIFIKASI SESAR AKTIF DI SEPANJANG JALUR KALI GARANG, SEMARANG E Hidayat
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 1 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i1.97

Abstract

The Semarang area, located in the northen part of Jawa, is an stable area to the subduction earthquake. There fore the active faults, that are originated from the earthquake, have to be concerned. On the landsat imagery there are some lineaments in the Semarang area meanwhile in the field there are some fault including morphotectonic and geological structure features. The morphotectonic features consist of escarpment, and creeping several segments of Garang River, and geological structure features are offset lithology, dragfold and joint in Quaternary rocks of Damar Formation. Based on analysis of the data, the north-south Kali Garang fault indictes an active fault.Keyword: semarang, geological structure, Kali Garang fault, active fault
STRUKTUR GEOLOGI BAWAH PERMUKAAN DANGKAL BERDASARKAN INTERPRETASI DATA GEOLISTRIK, Studi Kasus Sesar Palu Koro Marjiyono Marjiyono; H Kusumawardhani; A Soehaimi
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 1 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i1.98

Abstract

The existence of the Palu-Koro Fault, as an active lateral fault, has no doubt. Beside seismicity indications, geodetic observations has also proved the movement of this fault. However, subsurface studies in this section is not yet widely performed. Observation of geoelectric resistivity in Palu-Koro Fault zone has been performed at several sites around of this section. Results of analysis showes the presence of fault structures observed from offsetted bedrock as step over fault.Keywords : geoelectric, resistivity, Palu-Koro Fault, step over fault.
LITHOTYPE AND CHEMICAL CHARACTERISTICS OF THE SOUTH WALKER CREEK COALS, BOWEN BASIN, AUSTRALIA A K Permana; C R Ward; L W Gurba
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 1 (2013): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i1.99

Abstract

Lithotype analysis is very useful for guidance in microscopic analysis, predominantly maceral studies. However, the lithotype analysis may also contribute to identify mineral matter occurrence and chemical characteristics. The South Walker Creek coal occurs in a single seam 10.5 to 14 m in thickness and is dominated by dull and bright (40-60% bright), and dull with numerous bright bands (10-40% bright) lithotypes, along with minor dull (< 1% bright) coal. In vertical profile the lithotype content of the seams show an irregular pattern from the top to the bottom. The bright and banded coal tends mainly to occur in or around the middle of the seam. Carbonaceous shale and claystone are the most common clastic bands. The occurrence of clastic dirt bands is mostly associated with the duller plies in the coal seam. Duller lithotypes are mostly associated with a high proportion of inertinite and mineral matter content which is suggests the coal was formed in deep-water conditions. Proximate and fixed carbon analysis shows that the coal seam has relatively higher grade in the middle of the seam and decreases markedly in the top and bottom of the seam. This indicates that the middle of the seam associated with the bright and banded coal lithotype, however in the top and bottom of the seam in association with the duller plies or claystone and carbonaceous shale. This paper is developed from MSc thesis at the University of New South Wales, Australia.Keywods: coal lithotype, chemical characteristics, South Walker Creek, Bowen Basin
Changes in the Configuration of the Fresh Water Lens due to ASRRG, Western Part of the Tiny Pari Island, Seribu Islands, Jakarta, Indonesia Edi Prasetyo Utomo; Ananta Purwoaminta; Yayat Sudrajat
Jurnal Geologi dan Sumberdaya Mineral Vol. 18 No. 1 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v18i1.100

Abstract

Pari Island (Pulau Pari) is a small coral island in the Seribu Islands group off the north coast of the Jakarta Capital Special Region. Government has planned to develop this island into a tourist attraction because of its beautiful environment. However, the government development plans have not included facilities to meet the demand for groundwater, which represents the principal resource to meet the demand for freshwater. Pari Island has limited resources of groundwater due to the small size of the area where recharge of groundwater from rainfall can take place. A problem will arise that with the increase of visitors to the island the demand for freshwater will increase, while  groundwater resources of the island are very limited and dominated by brackish and saline groundwater. The objective of this research was to explore the possibility to increase the resources of fresh groundwater of Pari Island to support the increasing demand of fresh water. The method employed in the research is the application of ASRRG technology by the injection of the largest possible volume of rainwater and monitor changes of electrical conductivity and geoelectrical resistivity. Installation of an ASRRG network proved effective in lowering the salinity of groundwater in small islands. By increasing pore volume from 30% to 60% salinity decreases by 77%, which is reflected by the effect that the fresh groundwater lens which before comprised brackish water became fresh water with a thickness of 2.5 meter. The gain in pore volume equaled the decrease in salinity.Key words: Artificial recharge, Island hydrology, Salt-water/fresh-water relations, Indonesia
Hubungan Kelompok Maseral Liptinit dan Vitrinit dengan Tipe Kerogen Batuan Sumber Hidrokarbon pada Serpih Formasi Kelesa Bagian Atas, Kuburan Panjang, Riau Moh. Heri Hermiyanto Zajuli; Hermes Panggabean; Hendarmawan Hendarmawan; Ildrem Syafri
Jurnal Geologi dan Sumberdaya Mineral Vol. 18 No. 1 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v18i1.101

Abstract

This study focuses on correlation of liptinite and vitrinite maceral to kerogen type of shale from Kelesa Formation in Kuburan Panjang areas, Sumai sub-basin, Central Sumatra Basin. The composition of the organic material consists of vitrinite maceral ranged from 0.2 to 5%, liptinite from 0.6 to 4.7%, the type of minerals in the form of pyrite from 0.2 to 16%, and 0.2 -24.2% of carbonate, as well as clay minerals are the most dominant component ranged between 71.6 -98%. TOC values of the shale range from 1.18% to 7.17%, which indicate ability of the shale as a good source rock. Kerogen type analysis of theshale in the research area tends to indicate I, II and III kerogen types. There is an influence of the liptinite and vitrinite maceral groups abundance to the type of kerogen, where liptinit maceral group tends to produce type I and II kerogen. Key word : Kelesa Formation, Eocene-Oligocene, Central Sumatera Basin, Vitrinite, Liptinite
GUNUNG API PURBA DI DAERAH BAKAUHENI - PULAU SANGIANG,SELAT SUNDA, KABUPATEN LAMPUNG SELATAN S. Bronto; P. Asmoro; G. Hartono; S Sulistiyono
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 1 (2012): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i1.102

Abstract

Along the Merak - Bakauheni route, Sunda Strait, there are some island composing by Tertiary volcanic rocks. Relating to the plan of construction of Sunda Strait Bridge, several Tertiary and Quaternary volcanic islands at Merak – Bakauheni ferry route are examined as paleovolcanoes in order to evaluate their potential hazards. Methods that used in this study are remote sensing analyses of satellite image and topographic maps, and field geologic investigation. As results, three paleovolcanoes are recognized, namely Harimaubalak, Kandangbalak and Sangiang. To understand the history of their volcanic activities radiometric analyses are required. Those three paleovolcanoes are located in a line having NW – SE direction, considered as a weak zone because the pattern similarity with the active Sumatran fault system. To anticipate the possibilities of opening new vents or reactivated eruptions from the weak zone it is suggested to make further studies on seismicity, tectonic analyses, and the present of sub surface hot sources.Key words : bakauheni, harimaubalak, paleovolcano, sangiang, sunda strait, lampung
BATUAN ASAL DAN ALAS FORMASI PALEOGEN CEKUNGAN SERAYU S. Bachri
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 1 (2012): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i1.103

Abstract

The occurrence of volcanic fragments within the most rock samples of the Worawari Formation, as indicated by SEM and petrographic analysis, suggest that the mainsource rock or provenance of the Worawari Formation is a volcanic rock. The volcanic rock, supposed to be Paleogene in age, was deposited in a short time on land before reworked transported and deposited in the sea, or partly formed as pyroclastic fall which was directly deposited in the sea as indicated by the occurrence of sedimentary structures, mainly wavy and parallel lamination. Meanwhile, a part of the rock samples of the Worawari Formation contain slate fragments suggesting that parts of source rock are metamorphic rock and a quartz rich rock. The quartz rich rock is supposed to be granitic basement as indicated by gravity data. This basement rock is Late Cretaceous in age, as indicated by fission-track dating using By zircon content in the Worawari Formation. The age suggests that the basement rock is apart of the Southeast Asian Plate or Sunda Platform.Key words : provenance, basement rock, Serayu Basin, Paleogen formation
PARAGENESA MINERAL BIJIH SULFIDA HIDROTERMAL DI DAERAH KLUWIH KABUPATEN PACITAN JAWA TIMUR : PENDEKATAN BERDASARKAN MINERALOGI DAN INKLUSI FLUIDA Sudarsono Sudarsono; I. Setiawan
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 1 (2012): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i1.104

Abstract

Hydrothermal activity in Kluwih, Tulakan Pacitan area East Java indicated by rock alteration zone, sulphide mineralization, and quatz vein NNE-SSW, NNW-SSE trend. Mineralization deposited at least in 6 stages, yaitu : 1st stage, pre mineralization deposited quatz (320°C), 2nd stage, deposited quartz + pyrite (290°C), 3rd stage, deposited quartz + pyrite + chalcopyrite + bornite ± galena ± sphalerite (260°C), 4th stage, deposited quartz + pyrite + cahalcopyrite + Tetrahedrite + bornite ± galena (220°C), 5th stage, deposited quartz + pyrite (200°C), and 6th stage or supergen stage, deposited secondary mineral (covellite, malachite, azurite) <100 °C. The hydrothermal system was able in Kluwih Pacitan and surrounding area interpreted as epithermal low suphidation system, or base metal horizon to precious metal horizon. Hydrothermal process initially by propilitic alteration and deposited of sulphides and quartz vein, then argilic alteration overprint both. Finally, surface erosion outcropted those deposits at surface.Key words : hydrothermal, mineralization, sulphide ore, Pacitan
THE METAMORPHIC ROCK-HOSTED GOLD MINERALIZATION AT BOMBANA, SOUTHEAST SULAWESI: A NEW EXPLORATION TARGET IN INDONESIA Arifudin Idrus; Fadlin Fadlin; Sukmandaru Prihatmoko; I Wayan Warmada; Irzal Nur; Franz Michael Meyer
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 1 (2012): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i1.105

Abstract

Placer gold has been discovered in Bombana, SE-Sulawesi, Indonesia. The placer gold is not associated with volcanic rock-related gold deposits. This paper discusses the primary gold mineralization as the source of the placer gold. The placer gold is possibly derived from gold-bearing quartz veins hosted by Pompangeo Metamorphic Complex (PMC). Pyrite, chalcopyrite, cinnabar, stibnite and tripuhyite are present. Sheared, segmented vein varies in thickness from 2 cm to 2 m. The veins contain erratic gold in various grades from below detection limit (0.005 g/t) to 134 g/t. At least three generations of veins are identified. The first is parallel to the foliations, the second crosscuts the first generation of veins/foliations, and the third is of laminated deformed quartz+calcite veins at the late stage. The first veins are mostly massive to crystalline, occasionally brecciated and sigmoidal, whereas the second veins are narrower than the first and relatively brecciated. Gold grades in the second and third veins are relatively higher than that in first veins. Fluid inclusion study of quartz veins indicates abundant H2O-NaCl and a small amount of H2O-NaCl-CO2 inclusions. Temperature of homogenization (Th) and salinity of the first vein vary from 184.7 to 245.3 ºC and 5.26 to 9.08 wt.% NaCl eq., respectively. The second generation vein was originated at Th of 132.1-283.4 ºC and salinity of 3.55-5.86 wt.%NaCl eq., whereas the third generation vein formed at lowest Th varying from 114 to 176ºC and less saline fluid at salinity range between 0.35 and 4.03 wt.% NaCl eq. Gold is mainly identified in the form of 'free gold' among silicate minerals. Mineralogically, gold is closely related to cinnabar, stibnite, tripuhyite and possibly minor arsenopyrite. Metamorphogenic gold deposits would be the new target of gold exploration in Indonesia.Keyword: Gold mineralization, orogenic-type, Bombana, Southeast Sulawesi, Indonesia
INTERPRETASI POLA ANOMALI GAYA BERAT REGIONAL KAITANNYA TERHADAP POTENSI SUMBER DAYA GEOLOGI DI LENGAN SELATAN SULAWESI Subagio Subagio; Bambang S. widijono
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 1 (2012): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i1.106

Abstract

The research area is part of Western Sulawesi Geological Terrain, arranged by pre-Tertiary to Quarternary rocks. The pre Tertiary rocks exposed in Latimojong Mountain located at northeastern research area and Maros Mountain near Bantimala district at southwestern area. The pre Tertiary rocks consist of metamorphic, and ultrabasic rocks overlain by flysch sediments. These flysch sediments overlain by Paleogen terrestrial sediments and carbonate rocks. The Oligosen - Early Miosen rocks exposed at Bone Mountains. These rocks consist of clastic and volcanic clastic sediments. The carbonate rocks have also been faund in that area. The Middle Miosen - Pliosen clastic sediments exposed along the valley in Graben Wallanae. The Quarternary sediments is distributed in Wallanae River. Regional gravity anomalies indicate the main lineaments geological structure that developed in the study area. The lineaments are north-south, northwest-southeast, and north northwest-south southeast directions. Wallanae fault is indicated by north-south direction indicating parallel contours anomaly that separate high anomaly in the west and low anomaly in the east of Wallanae Fault. The high anomaly pattern indicates the occurrance of ultramafic basement rock with having a mass density 2.9 gr/cc, while low anomaly indicates the occurrence of metamorphic basement rock with having mass density 2,8 gr/cc. The undulation of residual anomaly reflects the straightness of shallow geological structures. The geological resources of the region area are hydrocarbon, coal, and metallic minerals. This hydrocarbon probably present in the low anomaly, coal in the marginal basinal anomaly, while metallic mineral is found at high anomaly area.Key words : Lineament, anomalies, basement rocks, geological resources, Sulawesi

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