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Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Published by Kementerian Energi dan Sumber Daya Mineral
ISSN : 08539634     EISSN : 25494759     DOI : -
Core Subject : Science, Education, Social, Engineering,
Education Energy Engineering Environmental Science
Jurnal Geologi dan Sumberdaya Mineral (JGSM) is an Indonesian scientific journal published by the Center for Geological Survey, Geological Agency, Ministry of Energy and Mineral Resources. The journal receives Indonesian or English articles. Those articles are selected and reviewed by our professional editors and peer reviewers.
Arjuna Subject : -
Articles 341 Documents
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Depositional Modification In Seram Through, Eastern Indonesia Kusnida, Dida; Naibaho, Tommy; Firdaus, Yulinar
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 2 (2016): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Seismic reflection profiles considered to represent the morphotectonics of the study area and verified by surficial sedimentary data presented in this paper directed to understand  the sedimentary depositional dynamics.  Seismic data interpretation results show the gradation and sediment facies cycles in accordance with the episode of tectonic activities, which is characterized by the avalanche of the Seram Trough base-of slopes materials. Seismic data reveal more than 1250 meters acoustically chaotic to laminated, indicate fine-grained sediments between slumps at its base of slope and fine marine sediments at the trough floor. Thus, it suggests that the Seram Trough is in the process of differential vertical movement causing depositional modification due to the accretionary prism growths.
Kompleks Batuan Ultramafik Meratus sebagai bagian dari Ofiolit Kerak Samudera Ditinjau dari Aspek Geomagnetik dan Gaya Berat Setyanta, Budi; Setiadi, Imam
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 6 (2006): Jurnal Sumber Daya Geologi
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Abstract

Geomagnetic and gravity analyses were carried out in the Banjarmasin quadrangle, South Kalimantan. Qualitative analysis of gravity anomaly show that ophiolite is located in the central quadrangle with anomaly values between 550 µms-2 and 750 µms-2 trending southwest-northeast.Geomagnetic qualitative analysis presents high  geomagnetic anomaly part values between 0 nT and 450 nT in the southern area, while low anomaly between -750 nT to 0 nT, generally in northern part of the sheet. Quantitative analysis was done by making subsurface geological profiles model AB, CD, and EF. Ophiolite rock from the gravity modeling have density between 2.7 gr/cc and 2.9 gr/cc. This is probably caused by fragmentation process which affect the basement oceanic rock mix by Pre-Cretaceous rock such as chert, metamorphic and carbonat rocks, accordingly this reduce the rock density, while geomagnetic model have susceptibility of 0.15 SI. Ophiolite rock was interpreted as oceanic crust bolder that overlay on the granitic crust which has less magnetization. This shows a subduction model which cause oceanic crust uplifted and laid on the upper of granitic crust and than revealed as Bobaris and Manjam ophiolite belts. Keywords : Geomagnetic, gravity, ophiolite, oceanic crust
COALBED METHANE POTENTIAL AND COAL CHARACTERISTICS IN MUARA LAKITAN AREA, SOUTH SUMATRA Hermiyanto, Muhammad Heri; Setiawan, R.
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 3 (2010): Jurnal Sumber Daya Geologi
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Abstract

A research on Coal Bed Methane (CBM) of the Muaraenim Formation has been conducted in the Muara Lakitan area. Megascopically, the coal lithotype varies from dull to bright banded, with black – brownish black and brownish to black streaks, brittle – friable, dull-greasy luster, even-uneven, dirty on fingers, with resin patch and striation, dirt bands (clay/mud layers), pyrite striation, and pore structures. The coal quality, gained from geochemical analysis, indicates that its ash content ranges between 1.22% and 2.47%, total sulphur content is from 0.15% to 0.3 %, and the volatile matter of 38.02% - 40.81%. The coal is dominated by vitrinite (73.6 – 85.8 %), with minor amount of exinite (1.4 – 4.0 %), inertinite (4.2 – 21 % ) and mineral matter (2.4 – 8.2 %). Vitrinite reflectance, varies from 0.44% to 0.45 %, tends to indicate a sub-bituminous to high volatile bituminous-A coal rank. Kaolinite clays are the most prominent mineral matter within all coal samples analyzed, although the clay textures show irregular shapes. Iron oxides are also present in several samples. Microcleats found within the coals are mostly open, and are rarely filled by clay minerals. Based on Barbara/Winter diagram, the methane gas content in the studied area ranges from 0.57 m3/t – 1.70 m3/t = 20.44 scf/t – 60.96 scf/t. The total reserve of gas within six coal seams in the studied area is 15.524,28 scf.Keywords : Coal Bed Methane (CBM), Muaraenim Formation, Muara Lakitan
IDENTIFIKASI POTENSI BENCANA GEOLOGI DI DATARAN PANTAI JEPARA, JAWA TENGAH Lumbanbatu, Ungkap; Sukapti, Woro Sri; Patriani, Emma Yan
Jurnal Geologi dan Sumberdaya Mineral Vol 15, No 3 (2014): Jurnal Geologi dan Sumberdaya Mineral
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Abstract

Identifikasi potensi bencana geologi di dataran pantai Jepara perlu dilakukan untuk mengantisipasi laju perkembangan pembangunan seiring dengan pertambahan penduduk yang sangat pesat. Oleh karena itu, perencanaan pengembangan wilayah yang baik perlu dipersiapkan. Dalam menyusun tata ruang, potensi bencana geologi dan potensi sumber daya alam harus dipertimbangkan. Metode penelitian yang digunakan adalah dengan pendekatan sedimentologi dan stratigrafi. Untuk maksud tersebut dilakukan pemboran dangkal dengan menggunakan bor tangan (hand auger). Beberapa bencana geologi dapat dikenali yaitu abrasi pantai, agradasi pantai (pendangkalan) dan kerentanan liquifaksi. Tataan geologi daerah penelitian menunjukkan bahwa, abrasi dan agradasi serta karakteristik pantai sangat boleh jadi tidak terkait dengan aktivitas tektonik.Kata kunci: bencana geologi, geologi bawah permukaan, dinamika Kuarter, Jepara
STRATIGRAFI DAN BIOTA JURA KEPULAUAN MISOOL, INDONESIA DAN KORELASI INTERREGIONAL DAN GLOBALNYA Hasibuan, Fauzie
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 3 (2009): Jurnal Sumber Daya Geologi
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Abstract

The Jurassic fauna of Misool Archipelago is very similar to Sula Islands on the basis of bivalve content, but it differs from Sula Islands in that good ammonite assemblages which replaced by assemblages of belemnites. The fauna of Misool Archipelago can also be correlated with Papua is on the basis of ammonite fauna such as Fontannesia killiani. Misool Archipelago fauna is also correlable with those of the European Alps, North America, Chile, Argentina, New Zealand, Northwestern Australia, North and South Tibet, Himalaya, etc. However, some areas correlation is based only on a few species and sometimes only on cosmopolitan genera. Keywords: Jurassic, Misool Archipelago, ammonites, bivalve, interregional and global correlation 
MORFOGENESIS DAERAH DANAU KALDERA MANINJAU, SUMATERA BARAT Santoso, Santoso; M.Lumbanbatu, Ungkap
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 2 (2007): Jurnal Sumber Daya Geologi
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Abstract

Geomorphologically, the investigated area can be classified into several morphologic origins, i.e: volcanic, fluvio-volcanic, volcanic denudated, denudational, structural-volcanic and fluvial. Moreover, on the basis of the aerial photo interpretation and ground checking, two volcanic cones can be recognized, i.e., old and young Maninjau volcanoes. This assumption supported by the bathymetry map of the Maninjau Lake that shows two points of maximum depth at different locations, -168 m in the north and -169 m in the south sides respectively. These data indicate that the volcano has two different eruption centres. Keywords: geomorphology, fluvio-volcanic, denudational, structural
LANDSLIDE HAZARD ASSESMENT ON JAVA ISLAND Case Study: Landslides In Warungkiara, Bogor, Majalengka, Banjarnegara And Jember Utomo, Edi Prasetyo
Jurnal Geologi dan Sumberdaya Mineral Vol 23, No 1 (2013): Jurnal Sumber Daya Geologi
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Abstract

All of landslides recorded in Indonesia between 2003 – 2006, 90% of the events occurred on Java Island, Indonesia. Due to lack of long term statistical data, their characteristics are not well known. Based on the analysis of climate, geology, topography and landslide statistical data, the landslide characteristics on Java Island can be ascertained. It can be concluded that the frequency of occurrences of landslides are highest in the southern part of the West Java Province, followed by the Central Java Province and the East Java Province.Landslides on Java island can be classified based on their triggering factors, which comprise: rainfall, morphology, earthquakes, lithology, and the occurrence of active faults. As far as types of landslides are concerned, rockslides and toppling are rather rare, while most landslides are of the sliding (translation, rotation, block failure), creeping and debris flow types. The materials involved in landslides comprise weathered volcanic breccia, sedimentary material mixed with clay, mudstone, sandstone, limestone, marl and pyroclastic (deposits of volcanic ash and tuffaceous sand) and loam.Landslide events significantly occur in the rainy season, especially from December to April. Dead and missing victims by landslides increase when annual rainfall is in excess of 2100 mm. In this paper, with reference to the above mentioned factors and conditions, type of landslide prone areas and countermeasures will be discussed.Keywords: Landslide hazard, Java Island, classification, statistical data analysis.
THE PROVENANCE AND DIAGENESIS OF SANDSTONES OF THE EOCENE TANJUNG FORMATION IN THE KUALAKURUN AREA, CENTRAL KALIMANTAN Heryanto, Rachmat; Margono, Untung
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 5 (2008): Jurnal Sumber Daya Geologi
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Abstract

Kualakurun area is located in the western margin of Tertiary Barito Basin. The basin was filled by the Eocene Tanjung Formation consisting of conglomerate and sandstone in the lowerpart, mudstone within tercalated by coal seams in the middle part, and sandstones in the upper part. The sandstones consist of subarkose, sub litharenite, and felspathi clitharenite. The framework grains dominantly consist of quartz with some lithic and feldspar fragments.The accessory minerals are muscovite and opaque minerals. The provenance of sandstone fragments of theTanjung Formation were derived from Continental Block (Craton Interior) and Recycled Orogen (Quartzose Recycled), which mostprobably were derived from the pre-Tertiary rocks of the Schwaner Mountains (Cretaceous granites and tonalities intruding Silurian-Permian metamorphic rocks) in the west of the Kualakurun area. Diagenetic processes identified in the sandstones are compaction, mineral authigenic and secondary porosity formations. The diagenesis regimeis categorizedas “mesogenesis mature A”, that is equal to mudrocks tageII, having apaleo-temperature of 80°upto95°C,and the burial depth ranging from2to3 kilometers. Keyword: provenance, sandstone, diagenesis, Tanjung Formation, Kualakurun
Fasies, lingkungan pengendapan dan sifat fisik (kesarangan dan kelulusan) batuan karbonat Formasi Parigi di daerah Pangkalan Karawang, Jawa Barat Praptisih, Praptisih
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 4 (2016): Jurnal Geologi dan Sumberdaya Mineral
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Abstract

Parigi Formation carbonate rocks well croped out in the Pangkalan area, Karawang. Research methods include both of field research of detailed observations of Parigi Formation carbonate rocks and laboratory analysis consisting of petrography and paleontology. The results showed that the carbonate rock of the Parigi formation can be identified into seven facies carbonate namely (1) plangtonic packstone facies, (2) foraminiferal packstone facies, (3) packstone facies, (4) bindstone facies, (5) rudstone facies, (6) Framstone facies, and (7) algal-forams packstone facies. The Parigi Formation estimated deposited on the environments lower reef slope, reef front, reef crest and backreef. The results of the analysis of large foraminifera fossils show the age Parigi Formation is Early Miocene. The physical analysis showed that porosity and permeability founded in framestone facies, up to 25.84% and 21.13 mD permeability. From the pattern of depositional environment The Parigi Formation in the central basin that is probably is in the west-southwest area. Keywords: carbonate rocks, Parigi Formation, facies, depositional environments, reefs
Petrogenesis of The Sintang Intrusives and Its Implications for Mineralization In Northwest Kalimantan Hartono, Udi
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 4 (2006): Jurnal Sumber Daya Geologi
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Abstract

Arc magmatism is a direct response to tectonic and chemical processes operating in subduction zones. The Sintang Intrusives consist of microdiorite, microgranodiorite, granite/ microgranite, quartz diorite, dacite, andesite, and minor rhyolite and rhyodacite (dacite predominant). Depletion of Nb relative to K and La concentrations are characteristics of the rocks, implying the magma was generated in a subduction zone environment. However, different from magma of other “normal” arcs that were derived from mantle wedges, the magma of the Sintang Intrusives was generated from subducted oceanic crust melting. The result of a careful study of trace element data show that the rocks are of adakite type, characterized by high Sr/Y and Zr/Sm ratios, moderate to strong fractionation of heavy rare earth elements (HREE) and absence of Eu anomalies suggesting melt extraction from garnet-amphibolite sources. By considering the tectonic development in the South China Sea and northwest Kalimantan, it is believed that the magma was probably originated from the melting of previously subducted South China sea oceanic crust (dead slab or fossil subduction) beneath Kalimantan continent in the Late Oligocene - Early Miocene. A compressive tectonic regime in Middle Oligocene, and possibly until Late Oligocene, led to crustal shortening and thickening that facilitated entrapment of arc magma in the Kalimantan crust. The fluid released caused by amphibole breakdown and may have been expelled from older amphibolebearing plutons during compressional tectonics would be significantly important for mineralization. Keywords : Kalimantan, Sintang Intrusives, oceanic crustal melting, mineralization

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