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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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COMPOSITIONAL VARIATIONS OF Au-Ag TELLURIDE MINERALS OF ARINEM DEPOSIT, WEST JAVA Euis Tintin Yuningsih
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 3 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i3.142

Abstract

The epithermal Arinem veins system of gold-silver-base metal mineralization is located in the Arinem area in the southwestern part of Java Island, Indonesia. The veins are composed predominantly of quartz+calcite±illite±kaolinite with variable amount of manganese oxide and limonite and high amount of sulfides. The deposit contains a number of Te-bearing minerals, notably tellurides and tellurosulfide minerals. The tellurium mineral assemblages in the Arinem and Bantarhuni veins are similar in the presence of hessite (Ag2Te), petzite (Ag3AuTe2), stutzite (Ag5Te3), tetradymite (Bi2Te2S) dan altaite (PbTe). The tellurium mineral assemblages vary from sample to sample and most of the observed telluride occurrences consist of at least 2 different phases (e.g. petzite-hessite, tetradymite-hessite, petzite-hessite-altaite). Gold concentrations measured in Te-mineral of petzite from the Arinem vein are in the range between 14.24 to 18.32 wt%. Some hessite and stutzite contain gold up to 3.48 and 1.10 wt%, respectively. Some of electrums are present as inclusions in Te-mineral patches in both veins.Keywords : Electrum, petzite, sulfide, tellurides, Arinem, Bantarhuni
KONTROL SESAR TERHADAP POLA SEBARAN URAT KUARSA DAN MINERALISASI EMAS DAERAH KUTAWARINGIN, JAWA BARAT J. Wahyudiono; C. Idham Abdullah; H. Z. Abidin
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 3 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i3.143

Abstract

The study area is located in Kutawaringin village, about 3.5 kilometers from Soreang city, the capital of Soreang district, Bandung regency. The purpose of this research is to show fault control on the research area that influence the distribution pattern of quartz veins and epithermal gold mineralization. Methodology in this research is initiated by literatur study. All data are compiled as overlaying maps to determine next step activities. Structural observations include macroscopic and mesoscopic. Results of the analyses are in form of structural geological map, main principal stresses distributions map and fault evolution map that could be valuable to develop a dilational zone map of the area. Structural geology investigation suggests that the main controls of the emplacement of andesit and dacite intrusive rocks as hydrothermal and metal minerals source are east-west trending dextral fault. Northwest-southeast trending normal fault are structural corridors along dilational zone. Quartz veins is distributed along dilational zone. The general trend of quartz veins is N 143°E/78°, relatively parallel to the dilational zone.Keywords : structures, dilational zone, alteration zone, mineralization, epithermal, Kutawaringin
AN OVERVIEW OF ARC MAGMA PETROGENESIS U. Hartono; R. Isnu H. Sulistyawan
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 4 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i4.145

Abstract

The petrogenesis of subducted-related magmas is complicated, and has been subject of controversy and widely discussed among petrologists, involving multi sources and multi processes. The source of arc magmas includes upper mantle with either MORB-like or OIB-like, the subducted slab which consists of an oceanic basaltic crust and possibly sediments, including material derived either through melting or release of fluid, and the arc crust. The process involves fractionation, assimilation or contamination and magma mixing. There are two types of contamination including source and crustal contaminations. Trace element and isotopic evidences suggest that most arc magmas are derived from melting of upper mantle induced by released fluids and incompatible elements from a subducted oceanic crust. Subsequent fractionation with or without assimilation or contamination and magma mixing would result in more acid magmas. However, crustal-derived magmas, resulted from melting of either subducted slab or lower crust, are also present in some arcs.Keywords : arc magmas, petrogenesis, overview
SEDIMENTOLOGI DAN STRATIGRAFI ENDAPAN SUNGAI CITARUM DI WILAYAH PERALIHAN MORFOLOGI PEGUNUNGAN DAN DATARAN TINGGI BANDUNG ANTARA DESA CIKAWAO DAN DESA NAGRAK (KEC. PACET) DAN DESA SUKAMAJU (KEC. MAJALAYA), KAB. BANDUNG H. Moechtar
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 4 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i4.146

Abstract

Citarum River deposits, which located at near Cikawao and Nagrag villages (Sub-district of Pacet) and Sukamaju village (Sub-district of Majalaya), Bandung District, consist of cobbles to boulders, sands to pebbles, sands, and clays. The research was carried by analysed sedimentology and stratigraphy of five vertical profiles with 1:20 scales, and the thickness of sediments vary from 1.6 to 4,0 m. Base on correlation, the sediment bodies can be devided into three Interval of Deposition Periods (IPP A to C), and ten of Sub-Interval of Deposition Periods (Sub-IPP A.1 to C.3).The lateral changes of sediments represented by each Sub-IPP, interpreted as result of internal processes such as morphology, energy, and flow. Vertically, changes of sediments that form nine steps of cobble to boulder resulted from the change of flow systems following climate change . It is understood that, the period of energy and flows correlate with climatic changes.Keywords: River channel, morphology, energy and flows, climate
PETROLOGI DAN GEOKIMIA BATUAN GUNUNG API TERSIER JELAI DI DAERAH MALINAU, KALIMANTAN TIMUR: Implikasi tektoniknya Baharuddin Baharuddin
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 4 (2011): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i4.147

Abstract

Geology of Malinau region in east Kalimantan is very little known because of its difficulties in accessibility. The aim of this study is to present petrology and geochemical data of the Tertiary Jelai Volcanic rocks and its tectonic implications. Nine samples have been analysed using XRF (major elements) and ICP-MS (trace and rare earth elements) methods and three samples were examined for absolute age dating using a K-Ar method. The Tertiary Jelai volcanic rocks in Malinau area are dykes and lavas having basalt-andesite-dacite in composition . Based on petrology and geochemistry data, the Jelai Volcanic rocks are medium medium calc-alkaline to tholeiitic series. Depletion of Nb and Ti indicates an island arc affinity. Absolute age dating using potassium-argon method for three rock samples yielded ages that vary from 16.13 ± 2.67 to 14.72 ± 0.90 m.a. or Neogene-Miocene-Burdigalian to Neogene-Miocene-Langhian. It can be concluded that the existence of Jelai volcanic rock is strongly related to subduction of the Palawan Oceanic Plate beneath East Kalimantan during the Middle Miocene soon after subduction of the South Chine Sea Plate ceased which is formed the Sintang Intrusives during the Oligo-Miocene time.Keywords: Tertiary Jelai volcanic rocks, petrology, geochemistry and tectonic
MODEL STRUKTUR SUBDUKSI KERAK DI PERAIRAN LAUT MALUKU DAN VULKANISME BERDASARKAN ANALISIS GAYA BERAT DAN KEGEMPAAN B. Setyanta; I. Setiadi
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 4 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i4.148

Abstract

Volcanic arc in Maluku Sea area with relative north-south trend, in the North Arm of Sulawesi consists of Taguladong, Biaro, Bangka, Sangihe islands, and west part of Halmahera are Ternate, Makian, Kayoa and Tidore islands. Bouguer anomaly in this area shows the line patterns that trend to be north-south, in same direction of the pattern of the regional geological structures with the anomaly value range (-100 mGal until 260 mGal). Gravity modelling analysis indicate the presence of subduction beneath the islands of Halmahera is tilted to the east with a steep, while in the western part which is below the north arm of Sulawesi is not visible. Structure pattern of gravity analysis show strike slip fault system in the west part, and thrust fault in the east part that controlling volcanism activity in this area.Keyword:
DEPOSITIONAL ENVIRONMENT OF THE SAROLANGUN COALS, SOUTH SUMATRA BASIN Asep Kurnia Permana; Hermes Panggabean
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 4 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i4.149

Abstract

The Muaraenim Formation, a Late Miocene unit within the South Sumatera Basin, is included in some of the most significant coal resources in Indonesia. The upper part of the unit exposed in the Sarolangun Region, where it consists mainly of sandstone and shale, with relatively thin (< 1.5 m) coal beds. Lithofacies analysis of the outcropping strata indicates that deposition took place in a terrestrial to marine environment. Microscopic analysis shows that the coal consists mainly of vitrinite maceral group (telovitrinite and detrovitrinite), with having a rare to sparse inertinite and minor liptinite and mineral matter. Palynological studies show abundant pollens, derived from mangrove vegetation that grew in a fresh water environment. The GI and TPI values, calculated from detailed maceral analysis, when plotted on similar diagrams to those developed by Diessel (1992) show the coals to have two different facies characteristics. Some of the coals, especially those having a high vitrinite content, show high TPI and relatively high GI values, suggesting that deposition was in upper delta plain and fluvial environments (wet forest swamp) with a relatively high rate of subsidence. Other coals have much lower TPI but higher GI values, indicating that peat was possibly developed in in a lower delta plain, with relatively slow subsidence conditions. Some coal samples also have high proportions of pyrite and other mineral matter, and thus it might have been deposited in more brackish environments. The change reflects the onset of marine transgression near the top of the Muara Enim sequence. Palynological analysis indicates the occurrence of fresh water and mangrove vegetation, supporting deposition in wet and possibly partly brackish conditions.Keywords: Depositional environment, Sarolangun coals, South Sumatera Basin, Indonesia
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

Page 13 of 49 | Total Record : 482

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