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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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FASIES KARBONAT FORMASI CAMPURDARAT DI DAERAH TULUNGAGUNG, JAWA TIMUR Praptisih Praptisih; M. Safei Siregar
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 2 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i2.107

Abstract

The Campurdarat Formation is one of the carbonate rocks exposed in the Tulungagung areas and its surrounding, East Java. Detail investigation for studying facies and sedimentation of this limestone has been conducted. The investigation include field investigation and laboratory method, consisting of petrography and micropaleontology. The result of petrographic analysis showed that the carbonate rocks in the area investigation can be divided into four types of facies such as packstone, floatstone, rudstone and boundstone. Packstone facies was deposited from the backreef – lagoon environment, floatstone facies in backreef and coral zones environments, rudstone facies in the reef zone environment and boundstone facies formed starting from the reef front - reef crest. The Campurdarat carbonate rocks are interpreted to represent a barrier – reef of Early Miocene age.Key words : Campurdarat Formation , facies, carbonate, environment, sedimentation, reef, Tulungagung
SEDIMENTOLOGI BATUGAMPING FORMASI RAJAMANDALA DI LINTASAN SANGHYANG, CITATAH, BANDUNG BARAT Sigit Maryanto
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 2 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i2.108

Abstract

The limestones of the Oligo-Miocene Rajamandala Formation cropped out at Sanghyang section, West Bandung District. Detailed stratigraphic section measured out along this 2.5 km section to predict the development of their depositional environments. This Rajamandala Formation having measured of 180 m thickness, and composed of boundstone, rudstone, grainstone, packstone, wackestone, and comm only deposited at regression basin. This Oligo-Miocene formation was situated at the southern part of the Eurasian continent foreland basin. The depositional environment of [his formation was initiated in core-reef to fore-reef slope facies. The deposition becomes interbeded of fore-reef slope to reef-flank facies with several core-reef facies. Due to regression event, the depositional environment change and jinalized by slope and shelf edges facies of carbonate platform.Keywords: Core-reef, fore-reef, reef-flank, slope and shelf edge.
MODEL DEFORMASI GETAS DI ZONA SESAR KALIGARANG, SEMARANG Fahrudin Fahrudin; Tri Winarno
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 2 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i2.109

Abstract

Tectonic activities in Semarang have resulted fault formations. A proper identification on faults and subsidiary structures will provide understanding on the kinematic and dynamic of the Kaligarang Fault. The Kaligarang Fault Zone has been formed since the Tertiary time with stress system orientation of σ1 = 37°, N158°E, σ2 =,45°, N12°E, σ3 = 30°, N244°E indicating left lateral displacement. Afterwards during Plio-Plestocene, the Kaligarang Fault Zone was reactivated with right lateral displacement as indicated by stress system orientation of σ1 = 51°, N185°E, σ2 = 30°, N205°E, σ3 = 8°, N275°E. Beside that, the linements at surroundings of the Kaligarang Fault have NEE-SWW until NWW-SEE directions. This structures were caused by the Unggaran activities.Keywords: Kaligarang Fault, stress system, reactivated, left lateral right lateral
MORFOTEKTONIK DAN POTENSI BENCANA ALAM DI LEMBAH KERINCI SUMATERA BARAT, BERDASARKAN ANALISIS POTRET UDARA S. Poedjopradjitno
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 2 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i2.110

Abstract

An interpretation of 1971 aerial photograph (phanchromatic) of the Kerinci valley area is intended to identify morphotectonic elements, in order to examine the genesis of Kerinci valley and to delineate a potential natural disasters zone. The interpretation shows the trace of macro morphotectonic elements related to the tectonic movements in the past, such as old faultscarp, young faultscarp, small faultscarp, shifting river channel, alignment of the valley and lineaments. Therefore landscape of the Kerinci valley was produced by structure activities that are dominated by vertical movements. Besides some of tectonic movements accompanying landforms are observed, such as a pile of fluvio volcanic fan and terrace deposites. The faultscarp pattern extends parallel to the direction of main fault in the Sumatra island and become narrows at the northern end. In this area is very potential for earthquakeKey words : morfotectonic, faultscarp, alignment, alluvial fan, earthquake
POTENSI BENCANA PELULUKAN DI DAERAH LABUHAN KABUPATEN PANDEGLANG PROVINSI BANTEN U. M. Lumbanbatu; S. Hidayat; S. Poedjopradjitno
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 2 (2012): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i2.111

Abstract

Was done Labuhan, Banten Province, and sourounding area located on alluvial plain are composed of loose, water saturated clastic sediments such as gravel, sand, silt and clay, suseceptible to liquefaction. Investigation of potensial liquefaction hazards to identify degree of liquefaction susceptibility and its ditribution in investigated area. An earthquake source zone trigger liquefaction origionated by subduction activity as well as by activation of faulst on Sunda Strait. To obtain subsurface geological data hand drilling were conducted getting 59 bore holes; known a liqueable material such as sand deposited on beach sand, beach ridges, and palaeo channel deposits. On the basis of grain size distribution and its physical characteristics, stratigraphical position, ground water level, liquefaction susceptibility in this area can be divided into high liquefaction susceptibilityintermediate liquefaction susceptibility, low liquefaction susceptibility, and very low liquefaction susceptibilityKey words : liquefaction, earthquake, water saturated sand, labuhan
COOLING OF GRANITIC ROCKS IN THE PALU REGION, MIDDLE SULAWESI: ZIRCON AND APATITE FISSION TRACK CONSTRAINTS Sam Permanadewi; Baharuddin Baharuddin
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 3 (2012): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i3.112

Abstract

Zircon and apatite fission track analysis has been employed to constrain a cooling episode of the Oligocene-Miocene granitic sequences in the Palu region, Middle Sulawesi. A fission track dating from five outcrops resulted in zircon ages ranging between 9.5±0.5 Ma and 29.5±2.1 Ma. These ages may represent the onset of crystallisation during magmatic emplacement. This interpretation is consistent with the corresponding K/Ar ages ranging between 8.6 Ma for biotite and 31 Ma for feldspar. All but one sample show apatite fission track ages younger than zircon ages. The apatite fission track ages range between 6.2±1.3 Ma and 29.3±2.5 Ma. Importantly, the oldest zircon and apatite crystals separated from the rock sample derived from pluton in the southern section suggest that the host sequence has not undergone a further cooling event since crystallisation in the Oligocene. However, the remaining apatite fission track ages from rock successions in the northern sector of the studied region reveal an episode of post-crystallisation rapid cooling of the Oligocene granitic pluton, possibly due to local-scale uplift in response to overthrust in the late Miocene.Keywords: cooling, fission track, granitic pluton, Sulawesi
FASE KOMPRESI DI SELAT MAKASSAR BERDASARKAN DATA GEOLOGI DARATAN, SEISMIK LAUT DAN CITRA SATELIT Syaiful Bachri
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 3 (2012): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i3.113

Abstract

Seismic data indicates that the last deformation period in the Makassar Strait has been undergonein compressional phase, different from the previous period as reported by many authors that Makassar Strait was formed in extensional phase. Terrestrial geology data obtained from West Sulawesi indicate that the vergence of thrust-fold belt is directed to the west, and is still active up to now. Meanwhile, the thrust and fold structures found in East Kalimantan have a vergence directed to the east. Seismic data from the eastern part of the Makassar strait shows that the youngest sediments is thrusted and folded with a vergence to the west. On the other hand, the youngest sediments from the western part of the strait is thrusted, folded and verging to the east. Meanwhile, the satellite imagery of the Makassar Strait shows that the west margin of West Sulawesi is similar to the margin of Paternoster Platform, suggesting an opening tectonics. However, interpretation of the youngest structures on the imagerry indicate that after opening episode subsequently was followed by compressional phase.Key words: compressional phase, extensional phase, Makassar Strait, thrust-fold belt, vergence. 
REKONSTRUKSI VARIASI BULANAN SALINITAS DI JALUR ARUS LINTAS INDONESIA SELAMA ~ 200 TAHUN: REKAMAN SALINITAS DARI δ18О KARANG BUNAKEN DAN BALI Indra Hernawan; Sri Yudawati Cahyarini; Mutiara Putri
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 3 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i3.114

Abstract

Salinity is one of important parameter in oceanographic studies. The long timeseries oceanographic data is required to more understand the variability of oceanographic condition. Coral geochemical proxies overcome the shortcoming of instrumental data availibility. δ18О contents in coral skeleton is influenced by sea surface temperature and δ18О seawater. δ18О seawater is influenced by salinity. In this study salinity is reconstructed using coral δ18О and SST from the data model. δ18О from Bunaken and Padang Bai (Bali) corals are used in this study. SST data from the ERSST, SODA and HAMSON are used to reconstruct salinity. This study result in that the Bunaken coral records the local salinity variation in monthly and annual mean resolution. Padang Bai coral records better salinity in annual mean variation than in monthly variation. In both region, salinity variation in decadal resolution does not show significantly different.Keywords: Salinity, Sea surface temperature, δ18О, coral, Bunaken and Bali.
KARAKTER DAN TIPE MINERALISASI HIDROTERMAL DI WILAYAH BOMBANA BERDASARKAN STUDI MINERALOGI DAN GEOKIMIA I. Setiawan; S. Indarto; AF. Ismiyanto; Sudarsono Sudarsono
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 3 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i3.115

Abstract

Bombana gold mineralization occurs within metamorphic rocks hosted environment, and it's not yet reported having connection with magmatisme/volcanisme. Therefore most ore mineral deposits have to be related with volcanisme bearing metallic mineralization. The aim of this study is to explain the character and types of gold deposit using petrography, mineragraphy, fluid inclusions, AAS, and geochemistry methods.Bombana area formed by orogenic activities which is composed by metamorphic rocks mainly consists by greenschist facies and ultra mafic rocks. Petrographically rocks called as garnet glaukofane amphibol schist, peridotite, serpentinite, sandstone meta, limestone meta, andesite meta, and altered rocks. While based on major elements composition, their parent rocks has ultrabasic-acidic rocks composition, formed peridotite to andesite.Gold mineralization of Bombana area indicates an epithermal-mesothermal type, which is exhibited by hydrothermal evidences such as crosscut veins after foliation and alteration at vicinity of quartz/calcite veins. These indicate that mineralization resulted by hydrothermally process and formed after metamorphism. Ore minerals consisted of gold, pyrite, chalcopyrite, goethite, lepidocrocite and cinabar and commonly associated with quartz veins as mineralized fluids suggested as low salinity (0,18-1,78)% NaCl equivalent and water rich mineralized fluid, at (210-350)ºC temperatur ranges.Keywords: Bombana, volcanic rocks, epithermal, metamorphism
KARAKTERISTIK INKLUSI FLUIDA DALAM MINERALISASI EMAS DI DAERAH LUMBAN JULU, TOBASA, SUMATRA UTARA B. H Harahap; H. Z. Abidin
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 3 (2012): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i3.117

Abstract

Fluid inclusions study have been conducted in the Lumban Julu area, Tobasa Residence, North Sumatra Province, in the frame work research of programs on metallogeny in the Bukit Barisan zone, North Sumatra segment. Samples analyzed are derived from quartz veins associated with gold mineralization. Metal content of the veins are 12 -131 ppm Cu, 13 - 495 ppm Pb, 8-183 ppm Zn, 2-407 ppm Ag and 0,01-1,85 ppm Au. These quartz veins are milky-white to transparent, prismatic shape and crustiform banding, colloform in texture, containing quartz and several other minerals such as chlorite, clay, epidote and opaque. Fluid inclusions within the quartz host form negative crystals, made up of two components (bi-phase) consisted of liquid and vapor. The liquid phases consist of primary and secondary inclusions and occur within quartz crystal and fractured zone. Liquid Fluid inclusion measurement shows that homogenization temperature can be divided into high-T (326 to >400°C) and low-T (135-262)°C. This hydrothermal fluid is rich in water with low salinity (- 0.28 – (- 1.36) % NaCl equivalent). The data confirm that boiling processes took place when mineral was deposited. Therefore, it is concluded that mineralization processes in the area comprise two systems of mineral depositions, firstly associated with high-T with mesothermal system at ± 1600 m depth and the second one associated with ephythermal system at ± 550 m depth.Key word: fluid inclusion, quartz, epithermal, Tobasa

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