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INDONESIA
Jurnal Geologi dan Sumberdaya Mineral
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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Potensi Batuan Induk Hidrokarbon pada Formasi Cinambo di Daerah Majalengka, Jawa Barat Praptisih, Praptisih; Kamtono, Kamtono
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 1 (2016): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

 Penelitan  endapan klastik berbutir halus dan karakteristik litofasies batuan Formasi Cinambo bertujuan untuk memperkirakan potensi batuan induk dalam menghasilkan minyak dan gas di daerah Majalengka.  Pengambilan 14 contoh  batuan dilakukan untuk analisa geokimia di laboratorium yaitu  analisa kandungan TOC , analisa Pirolisis Rock-Eval dan GC-MS. Hasilnya menunjukkan nilai TOC sebesar 0,42 – 1,90 %,  potensi rendah hingga baik  untuk membentuk hidrokarbon. Hasil analisis pyrolisis rock Eval memperlihatkan T max sebesar 359  - 475 oC termasuk kategori belum matang hingga paska matang. Berdasarkan nilai HI sebesar 12 – 114 mg HC/g TOC, fasies organic di daerah penelitian dapat dibagi menjadi 2 fasies yaitu fasies CD dan D,   dapat menghasilkan minyak dalam kuantitas sedang dan gas dalam kuantitas relatif kecil. Type kerogen Formasi Cinambo di daerah penelitian berdasarkan diagram TOC versus PY menunjukkan tipe kerogen III, termasuk oil prone dan gas prone. Hasi analisis GCMS menunjukkan bahwa batuan induk di daerah penelitian mempunyai kondisi lingkungan pengendapan yang material organiknya berasal dari tanaman darat. Kata Kunci : batulempung, batuan induk, hidrokarbon, Formasi Cinambo, TOC. 
Potensi Zeolit di Daerah Sangkaropi-Mendila, Tana Toraja, Sulawesi Selatan Kartawa, Wawa; Kusumah, K.Darwin
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 6 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The parent rock of zeolite at the Sangkaropi-Mendila area is composed of altered lithic and glassy tuffs, which is included within Lamasi Volcanic of Oligocene age. The zeolit was originated from volcanic ash with involvement of hydrothermal process. It is indicated by the presence of hydrothermally altered minerals such as chlorite, epidote, clay mineral, carbonate and silica. Nineteen rock samples have been analysed for petrography, SEM, CEC, ASD, XRD, XRF and AAS. Petrographic and SEM analyses show that the types of zeolites are mordenite and heulandite. The mordenite is characterized by textures of rat's nest and fibres, while the heulandite has a blocky monoclinic crystal texture with CEC up to  108,43 meq/100 g. Only three samples of ASD and one sample of XRD treatment contain composition of mordenite. Results of the XRF analysis show contents of SiO2  (62,69%-81,03%), Al2O3  (9,90%-19,82%), CaO (0,10%-0,22%), Na2O (0,12%-4,32%), K2O (0,63%-6,88%) and LOI (1,26%-12,62%). A total resource of 168.480.000 tons of Sangkaropi-Mendila zeolite  was identified within an area of 360.000 m², offering a good prospect to the sectors of fishery, agriculture, waste handling and other industry. Keywords : zeolite, mordenite, heulandite, Sangkaropi, Mendila
LINGKUNGAN PENGENDAPAN BATUBARA, FORMASI KALUMPANG DI DAERAH MAMUJU Hermiyanto, Moh Heri; Mangga, Sahril Andi; Koesnama, Koesnama
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 4 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Kalumpang (Toraja) Formation comprises syn-rifting sediments of Middle Eocene – Late Eocene age. This formation consists of quartz sandstone, conglomerate, shale, claystone with alternations of coal and limestone. Geochemical analysis shows that the caloric value ranges from 2480 kal/gr to 7440 kal/gr, moisture varies from 1,3%-6,7%, volatile matter 14,7%-44,9%, total sulphur 0,82%-7,70%, and the specific gravity ranges from 1,33 to 2,17. Based on the organic petrography analysis, the coal contains vitrinite 91,6 – 100%, liptinite or exinite 0,1 – 8,2 %,and inertinite 0,1 – 1 %. Maximum reflectance vitrinite (Rv-max) is ranging from 0,32%-0,62%, Ro 47%. The dominant maceral group is vitrinite, with rare liptinite. The high content of vitrinite suggests that the coal in Kalumpang is derived from plants in humic condition which were deposited in wet forest swamp. Meanwhile, the low content of inertinite indicates that oxidation processes did not take place intensely.Keywords : Kalumpang Formation, coal, eocene, organic petrology, maceral
MIKROFASIES BATUGAMPING FORMASI BATUNUNGGAL DI DAERAH BINUANG, KALIMANTAN SELATAN Maryanto, Sigit; Kusumah, Kusdji Darwin
Jurnal Geologi dan Sumberdaya Mineral Vol 15, No 4 (2014): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Pembahasan utama penelitian ini meliputi ragam fasies pengendapan batugamping Formasi Batununggal yang tersingkap di daerah Binuang, Kalimantan Selatan. Analisis petrografi terhadap delapan belas sampel batugamping menunjukkan bahwa jenis batugamping yang ada meliputi wackestone, packstone, grainstone, boundstone, dan batugamping kristalin. Lingkungan pengendapan batugamping ini meliputi laut dangkal hingga lerengan lokal dengan sirkulasi terbuka di wilayah belakang terumbu, saluran pada landaian terbatas dan dataran pasang-surut, fasies sayap terumbu hingga lereng depan terumbu. Formasi Batununggal yang berumur kapur Awal hadir sebagai olistolit di dalam Formasi Keramaian yang berumur Kapur Akhir hingga Paleosen Akhir.Kata kunci: Batugamping, petrografi, mikrofasies, formasi.
MORFOLOGI DAN UMUR PERPINDAHAN ALUR SUNGAI OPAK DI DAERAH BERBAH SLEMAN Santoso, Santoso
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 4 (2009): Jurnal Sumber Daya Geologi
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Abstract

The morphologic condition of the Opak valley at Dadapan Village, Berbah area, indicates that the Opak River has three times shifted. Based on the passing compass land detail measurement, three paleo river valleys, can be recognized which are separated by terrace morphology. The result of carbon dating by using C14  method to the organic clay deposits which was taken from Opak valley 1, 2, 3, and existing river, shows the ages are 6950 years BP, 6800 years BP, 6430 years BP, and 6360 years BP. It proves that the tectonic in this area is very active, because during Upper Holosen (‹ 10,000 years) the Opak River has three times shifted. Keywords: paleo river channel, shifting, tectonic
PENELITIAN BIOSTRATIGRAFI MESOZOIKUM PULAU ROTE, NUSA TENGGARA TIMUR Hasibuan, Fauzie
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 3 (2007): Jurnal Sumber Daya Geologi
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Abstract

A biostratigraphic study in Rote Island has proven that the distribution of Mesozoic rocks (especially Triassic, Jurassic,and Cretaceous) are broader than was thought by previous workers. The Paleozoic rocks are not exposed, but somefossils collected from the surface suggest that such rocks are present deep down in the earth subsurface of this island.The fossils were brought to the surface along with other materials by mud volcanoes which are common on the island.Mesozoic biostratigraphy of the Rote Island begins with Triassic, followed by Jurassic up to Cretaceous which areindicated by the presence of its fossils. Timorites sp., an ammonite genus indicating Permian (Paleozoic), yet theformation from which it originated is not known.In Mesozoic time, some species of Halobia lived indicating a Carnian to Early Norian age as shown by the presence of H.(H.) austriaca, H. (H.) styriaca, and H. (H.) charlyana in the Aitutu Formation. The presence of Monotis (M.) salinariashows that the Aitutu Formation is up to Late Norian in age. Fossil association is found in the Wailuli Formation,consisting amongst others of Ostrea sp., Perisphinctes timorense, Belemnopsis moluccana, B. galoi, B. stolleyi,Orbyrhynchia sp. and Irianites sp. Irianites sp. which indicates Bathonian is also found in the coeval formation in SulaIslands. Perisphinctes is generally found in Late Oxfordian. Belemnopsis moluccana has an age range from EarlyOxfordian to Early Tithonian, B. galoi from Kimmeridgian to Late Tithonian, and B. Stolleyi from Early Tithonian toBerriasian.The Nakfunu Formation exposed in Termanu area has a Cretaceous age in Rote Island. The formation is rich in radiolariasuch as Dictyomitra sp. which indicates Albian (Early Cretaceous). Trace fossils such as a large paramoudra are alsofound. Samples of radiolaria-bearing rocks were also collected, but the materials have not been studied due to lack ofthe expertise in the Geological Survey Institute. Keywords: Biostratigraphy, Paleozoic, Mesozoic, Aitutu Formation, Wailuli Formation, Nakfunu Formation, Halobia, Monotis, belemnites, ammonites
LITHOTYPE AND CHEMICAL CHARACTERISTICS OF THE SOUTH WALKER CREEK COALS, BOWEN BASIN, AUSTRALIA Permana, A K; Ward, C R; Gurba, L W
Jurnal Geologi dan Sumberdaya Mineral Vol 23, No 1 (2013): Jurnal Sumber Daya Geologi
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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
STUDI GEOMORFOLOGI UNTUK KELAYAKAN TEKNIS JALAN RUAS KANDANGAN- BAGANDAH KALIMANTAN SELATAN Poedjoprajitno, Soemantri
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 5 (2008): Jurnal Sumber Daya Geologi
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Abstract

Kandangan-Bagandah road is the shorthest road alternative, which connects many town in South Kalimantan with the sea port of Batulicin, South Kalimantan.The road crossing a steep slope terrain and the very thick weathered soil has caused this road segment have the high susceptibility of mass movement.Geomorphological problems causing the road damage relate to the condition of landform such as: slope, degree of land density, peat or clay zone. Based on the physical aspect, the problems occurr as: mass movement soil creep, rock fall, development of valley (lateral erosion, backward erosion) and subsidence.Keywords: landform, lineament, sloping, mass movement, roadway
INITIAL STUDIES OF THE MARINE GEOPHYSICAL SURVEY IN THE OFFSHORE WAIGEO, WEST PAPUA Kusnida, Dida; Subarsyah, Subarsyah; Saputro, Eko; ali, arif
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 3 (2016): Jurnal Geologi dan Sumberdaya Mineral
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Abstract

The offshore northern Waigeo situated and evolved within the obliquely converging of the Australian and Pacific plates boundary zone and  bound by an active left-lateral transform fault of the Sorong Fault Zone (SFZ) in the southern part. In general the Waigeo waters characterized by +200 nT to -150 nT of total magnetic intensities which indicate that the study area possibly overlain by a homogenous rock of oceanic origin in the form of highs (terranes) and lows (basins).  Seismic data indicate that the morphology of the study area relatively steep due to the tectonic contact boundary between island-terranes of Waigeo and between Ayu islands and Pacific Oceanic crust. This tectonic contact boundaries characterized by the present of Waigeo Trough that extends southeast-northwest direction. Seismic data reveal about 1000 meters thick of acoustically chaotic to laminated, indicate fine-grained sediments of slumps at Waigeo Trough slope and trough floor, and about 1500 meters thick of pelagic sediments at the Ayu Trough.
Akibat Ketidakstabilan Lereng Cekungan Dasar Laut pada Batuan Sedimen Neogen di Desa Kananggar, Kabupaten Sumba Timur, Nusatenggara Timur Astjario, Prijantono
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 4 (2006): Jurnal Sumber Daya Geologi
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Abstract

Indonesia has thousands of islands in various tectonic settings and, in consequence, it has an immense variety of submarine slopes. Due to the ongoing orogenic processes, Cenozoic basins have emerged, and their evolution can be studied in more detail. Giant slide masses entirely made up of an incoherent association of broken, folded, and crumpled strata occuring along the transect to Kananggar. The best exposed example is located ENE of Kananggar. It follows on top and laterally from a succession of about 100 meter of very thick-bedded, stacked debris, flow-turbidite channels. The slide could be observed 2 in an area of some 10 km . The observed thickness is in order of 120 m and the mass is directly overlain by a normal stratified pelite-turbidite succession. Keywords: slope, basin, sea floor, slide, Kananggar

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