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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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Karakteristik Minyak Bumi di Blok Bula dan Blok Oseil, Pulau Seram, Maluku Wahyudiono, Joko; Adlan, Ryandi; Permanadewi, Sam; Gibran, Akhmad Khahlil
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 4 (2018): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Oil that produced in a petroleum system must have specific characteristics depend on the source rocks. These characteristics are able to be understood by analyses of organic geochemistry. Gas Chromatography - Mass Spectrometry (GC-MS) is a very accurate tool for determining the characteristics of oil and gas. This research shows the evidence that oil samples taken from Bula Block and Oseil Block, Seram Island have the same source.Keywords: petroleum system, organic geochemistry, Bula, Oseil, Seram Island
Identifikasi Objek Bawah Permukaan Menggunakan Metode Ground Penetrating Radar di Kompleks Candi Kedaton, Muarojambi, Indonesia Sugiarto, Bambang; Lucki Junursyah, G.M; Pratomo, Indyo
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 4 (2018): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Ground Penetrating Radar (GPR) survey using 200 MHz frequency antenna have been conducted in July 2011 at Kedaton Temple Complex, Muarojambi, Jambi, Indonesia. The survey is aimed at providing subsurface information without digging (excavation) as in usual  conventional archaeological methods. The data were collected on six lines around the main building and a courtyard inside the boundary fence of Kedaton Temple Complex. Good quality data were obtained with signal to noise ratio greater than 110 dB. The result of the subsurface model based on the electromagnetic properties of rocks generating three layers of soil, from the youngest are Layer A with a thickness of 0.26 meters to 0.78 meters, Layer B with a thickness up to 1.51 meters, and Layer C coveringthe indication of archaeological object with a thickness of 0.35 meters up to 3.87 meters. The southern part of the main building showsa delineation and spread of thick layers of soil with a total thickness up to 4.50 meters, while the northern part of ancillary buildings shows a delineation and thin layers of soil with a total thickness only 2.60 meters. The indication of archaeological objects in the sub-surface indicated by the presence of anomalous heights which has a depth varying from 1.65 meters to 4.50 meters. This is interpreted to be a sub-surface anomaly that is likely to be archaeological objects still buried. The archaeological object may represent an ancient building in the zone of depression that accumulates due to the great floods, tidal Batanghari River, and sea level fluctuation in the past.Keywords: Archaeology, geophysics, Ground Penetrating Radar (GPR), Kedaton, Muarojambi.
Genesis Granit Muncung dari Pulau Lingga Berdasarkan Data Geokimia dan Mikroskopis Irzon, Ronaldo
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 3 (2015): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Granit Muncung dan Granit Tanjungbuku merupakan dua satuan granitoid yang terdapat di Pulau Singkep. Sebelumnya telah diketahui bahwa Granit Muncung merupakan tipe-S dan sebagai bagian dari 'Main Range Granite Province' di Asia Tenggara. Penelitian terkini menyebutkan bahwa Granit Muncung dapat dikelompokkan dalam dua fasies berdasarkan kandungan geokimia. Penelitian ini mengulas lebih lanjut mengenai Granit Muncung yang terdapat di Pulau Singkep melalui data geokimia dan mikroskopis. Dengan memanfaatkan genesa yang lebih terperinci dan up to date, hipotesis Granit Muncung sebagai tipe-S turut diperkuat melalui makalah ini. Karakter contoh terpilih sebagai granitoid yang cenderung ferroan menunjukkan kelimpahan Fe yang lebih besar relatif terhadap Mg. Penambahan K dan Na, maupun pengurangan Ca selama diferensiasi diduga berhubungan dengan sifat alkali-calcic pada batuan granitik ini. Data mikroskopis, diagram ANK vs A/CNK maupun penghitungan ASI menunjukkan sifat peralumina kuat dari contoh ini.Kata kunci - geokimia, Granit Muncung, tipe-S, Pulau Singkep, peralumina
PERKEMBANGAN DATARAN PANTAI (COASTAL PLAIN) DAERAH KENDAL PROVINSI JAWA TENGAH M.Lumbanbatu, Ungkap
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 4 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

A coastal plain area having dynamic charakterisitc. Understanding of Quaternary stratigraphy plays an important role in explaining the occurance of geological processes during the development of the coastal plain. Holocene stratigraphic sequence analysis reveals that the studied area has been influenced by several geological processes such as sea level rise and drop, and tectonic activities. These geological phenomenas are expected as the agents to change the directions of coastal plain development. Keywords: tectonics, quaternary stratigraphic sequences, sea level rise, sea level drop 
PATAHAN AKTIF DAN KEGEMPAAN DAERAH PLTA CIRATA - SAGULING DAN SEKITARNYA Soehaimi, Asdani
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 6 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Electric Hydro Power of Cirata (PLTA) and Saguling are located at the active thrust fault of Citarum – Cisomang (1) and Saguling (2). The gravity modelling on the north – south direction, shows these structures geology as the bounderies of the structural basin of Cirata and Saguling which are filled by Young Volcanic Deposites. Microearthquakes at the Saguling (I), Cirata (II) and Pasir Cabe (III), have the depth of < 10 Km and shown the thrust, strike slip and normal fault focalmechanisms. The maximum magnitude calculated which was based on the vertical displacement (dip slip) of two main revers fault above are 7 Ms with return period of 80 years.Keywords: active fault, maximum magnitude, return period, Cirata
PETROLOGI BATUAN MAGMATIS NEOGEN DAERAH PANGKALAN KOTABARU LIMAPULUH KOTA SUMATERA BARAT H.Harahap, Bhakti
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 4 (2007): Jurnal Sumber Daya Geologi
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Abstract

Neogene magmatic product in Pangkalan Kotabaru region are plotted by using TAS diagram (total alkali versus silica), and they have wide variations of rocks namely basaltic trachy andesite, basaltic andesite and dacite. On diagram SiO2 versus K2O, most of the Neogene andesite and dacite are classified as high-K calc-alkaline and rare normal calc- 2 alkaline and tholeiite, and on AFM diagram the samples are concentrated around the dividing line between calcalkaline and tholeiitic fields. In general, the Neogene volcanic rocks from this area are characterized by high aluminium (Al2O3) that varies from 15.50 - 18 wt%, low MgO (2-5 wt%), alkali (Na2O+K2O) content less than 8 wt% and low TiO2 (<1 wt%). While the trace element of the rocks is summarized on the spider diagram. Here their patterns are showing enrichment in large ion lithophile elements (LILE) and light rare earth elements (LREE) relative to high field strength elements (HFSE) and heavy REE (HREE). Moreover, these patterns show an Nb negative anomaly that resembles the typical characteristic of arc volcanism. The geochemical characteristic of the volcanic rocks from this area have lower concentrations of Ba, Sr and La than other active continental margins like the Andes volcanic rocks. Like many other subduction related rocks, this volcanism characterizes a very evolved magma with MgO contents ranging from 1-5wt% and low Mg# (MgO/MgO+FeOtotal) at maximum of 40. The island of Sumatera is on the western side of the Sunda Craton (Sundaland) where India-Australia Oceanic Plate is being obliquely subducted beneath the island since Eocene. The Neogene volcanic rocks from Pangkalan Kotabaru region have been interpreted to be directly related to this subduction process. Key words: magmatism, geology, Pangkalan Kotabaru, petrology, Neogene
Gunung Api Lumpur di Daerah Cengklik dan Sekitarnya, Kabupaten Boyolali Provinsi Jawa Tengah Bronto, Sutikno; Asmoro, Pudjo; Efendi, Mutiara
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 3 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

District of Boyolali and surrounding area have manifestation of an old mud volcano deposits which is locally exposed in E-W direction, about 20 km length and 3-5 km wide, start from Cengklik Lake until western side of Solo River. The mud volcano deposits have clay-silt size and sand-gravel of scoriaceous basaltic andesite in Gununglondo village. Materials below the mud deposits are composed by dike or sills-like rocks which penetrate within the sediment layer and fill the fracture formed a diapiric and mud ball structure, whereas the loss materials tend to leave diatremal traces and surficial deposits. Data showed in this research illustrate the mud movement from subsurface to the earth surface which is comparable with volcanic eruptions. After reaching the surface, mud deposits form layers with some slight folded and faulted structure. Cengklik Lake depression is presumed to be paleo mud volcano crater. Cengklik and surrounding areas are rapidly develop due to the existence of Adisumarmo international airport and construction of Solo-Semarang–Surabaya toll road. Considering the geological condition below Cengklik and surrounding area, which is composed by mud volcano deposits and experienced many fracture, they assumed to be a weak zone. The main potential geological hazard is the surface deformation along the toll road because of its low capability to endure the road construction and vehicle weight. Other potential hazards are groundwater pollution, earthquake, and mud volcano reactivation. Therefore, sustainable research and geological hazard mitigation of Cengklik and surrounding areas are necessary to do. keywords: mud volcano, Cengklik, Boyolali, geological hazards, mitigation 
Konfigurasi Cekungan Tomori Berdasarkan Data Gayaberat Padmawidjaja, Tatang
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 1 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (696.559 KB) | DOI: 10.33332/jgsm.geologi.20.1.27-36

Abstract

Geophysical research in Tomori Basin, Kolonodale Bay using the gravity method was carried out to identified anticline structural trap in associated with hydrocarbon prospect. The occurence of hydrocarbon seepage in some places, indicate that hydrocarbon have been formed although its distribution is not clearly known. The gravity Bouguer anomaly resulted two groups of rock units: the group of 40 mGal up to 120 mGal gravity anomaly represent ultramafic rocks, and group of 30 mGal up to -80 mGal gravity anomaly reflected a sedimentary rocks basin. The subsurface modeling of the rock density can be grouped into three layers: the Cenozoic (2.5-2.55 gr/cm³ density), the Mesozoic (2.6-2.7 gr/cm³ density), and the Basement ( 2.8-2.9 gr/cm³ density). Elongated and vertical closure are reflected by anomaly 0-2 mGal with density 2.5 gr/cm3 to 2:55 mGal which is supposed to be oil and gas structures. The Source rock is characterized by  0  to -10 mGal anomaly  interpreted as oil kitchen at sub-basin area. Location of the reservoir rock is assumed in the Cenozoic layer on Salodik Group with density of 2.5 gr/cm³. The Basement is estimated at depth of 3.5-4 km, derived from the Group of metamorphic and volcanic rocks.Keyword: Gravity, basin, residual anomaly, fault, anticline. DOI:10.33332/jgsm.2019.v20.1.27-36
Perkembangan Fasies Sedimen Formasi Mamberamo Berumur Miosen Akhir-Pliosen di Cekungan Papua Utara Mamengko, David Victor; B.Sendjadja, Yoga; Mulyana, Budi; Panggabean, Hermes; Haryanto, Iyan; Lelono, Eko Budi; Musu, Juwita Trivianty; Panuju, Panuju
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 1 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.459 KB) | DOI: 10.33332/jgsm.geologi.20.1.37-47

Abstract

North Papua Basin is a fore arc basin located in northern coastal of Papua Island. This basin filled by Middle-Upper Miocene turbidite sediment and overlied by Upper Miocene – Quarternary clastic sediment. Upper Miocene – Quaternary clastic sediments (Mamberamo Formation) composed by interbedding conglomerate, sandstone and shale as molasses deposit. A detailed stratigraphic study was performed to identify facies and its association of the Mamberamo Formation to that give a new perspective on the characteristics and development of facies succession of Lower Mamberamo Formation. Result  shows that the Lower Mamberamo Formation consists of three facies: A) cross bedding sandstone (subtidal), B) heterolothic silty shale (intra-tidal), C) carbonaceous shale (supra-tidal) deposited on Late Miocen to Plio-Pleistocene during centra range orogeny (syn-orogeny) as molasses deposits.Keywords: Fore arc basin, North Papua Basin, Mamberamo Formation, molasse deposits.
Bioremediation Experiment Using Hydrocarbon Degrading Bacteria Susilawati, Rita
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 1 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (196.72 KB) | DOI: 10.33332/jgsm.geologi.20.1.1-7

Abstract

A laboratory experiment was set up to demonstrate the capability of microbe to remediate petroleum hydrocarbon contaminated beach sand. Oil contaminated soil was used as a source of inoculum for hydrocarbon degrading bacteria (HDB) while oil contaminated beach sand was used as remediation object. The growth of HDB in the inocula was enriched and stimulated through the addition of nutrient in the form of vitamin and mineral as well the addition of oil waste as a source of carbon. Experiment took place in the course of approximately five weeks. Microscopic observation clearly showed the interaction between microbe and oil contaminant both in enrichment and bioremediation samples. The result of the experiment also suggests that approximately 25% of the petroleum hydrocarbon mass in the contaminated beach sand was biodegraded over the course of one month. Overall, the results of this experiment suggest the potential of bioremediation method to treat petroleum hydrocarbon polluted environment.Keywords: bacteria, bioremediation, hydrocarbon DOI: 10.33332/jgsm.2019.v20.1.1-7

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