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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 6 Documents
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Search results for , issue " Vol 18, No 6 (2008): Jurnal Sumber Daya Geologi" : 6 Documents clear
IDENTIFIKASI PERKIRAAN BATUAN ASAL SEDIMEN LEMPUNG PADA PERMUKAAN DASAR LAUT PERAIRAN INDRAMAYU BERDASARKAN PENDEKATAN ANALISIS GEOKIMIA DAN INDEKS PROPERTIS Budiono, Kris
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 6 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The bottom sea surface sediments of Indramayu water is characterized by differences of type and distribution of these sediments.The geochemistry and index properties tests give the information about the natural condition of water content and the other physics and chemical properties of sediments. The empirical relation have been developed between index properties and general properties for land soil or sediments. Most of that empirical relationship can be applied for marine surficial sediments, because in general the terrigenous sediments that similar  with the sediments which was transported from land or coastal zone to the bottom sea. The result of geochemistry and index properties test shows that the characteristics of sediments in Indramayu sea water appear to be difference from one sample to the another sample. This condition is probably caused by the difference of distribution of clay minerals or the rock origin of sediments .Key word : Geochemistry and Index properties, clay sediments, sea bottom surface sediments.
MODEL GEOLOGI BAWAH PERMUKAAN DAERAH MUARAWAHAU HASIL ANALISIS ANOMALI GAYA BERAT BERDASARKAN ESTIMASI KEDALAMAN DENGAN METODE ANALISIS SPEKTRAL Setyanta, Budi; Setiadi, Imam; Simamora, W.H.
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 6 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

A Study about a depth estimation on a gravity model in Muarawahau quadrangle, East Kalimantan, by using a Spectral Analysis method is very helpful to reduce ambiguity that appears in each modeling. The qualitative analysis shows that high anomalies lay at the eastern part of  the research area with values between  10 - 55 mgal, while low gravity anomalies between  -60 to 9 mgal lay at the western area. Two groups of anomaly in this area reflect a basin and basement high which is separated by a regional strike slip fault . A Model resulted  from  East to West  profiling and supported by a Spectral Analyses Method shows that the basin is constructed by PreTertiary rocks with density of about 2.6 gr/cc and thickness approximately 5 km, experiencing tectonic deformation. The eastern high anomaly block is the reflection of ultramafik rocks and mélange with the density of about 2.65 gr/cc. Rocks in this block is partly covered by volcanic sediments abaut 500 meter thich (2.3 gr/cc). However based on the values of anomaly, those two blocks are still underlined by the same granitic continent, meanwhile the existing ultramafic rocks are only ophiolite fragmen of oceanic crust. Keywords : Gravity anomaly, depth estimation, geological model.
STRUKTUR GEOLOGI BAWAH PERMUKAAN DAERAH KEBUMEN BERDASARKAN ANALISIS POLA ANOMALI GAYA BERAT DAN GEOMAGNET Subagio, Subagio
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 6 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The Gravity anomaly pattern of research area is devided into two groups  involving high and low anomalies. The high anomaly dominating at western and eastern area have positive circular pattern, and the value ranges from 90 mgal to 145 mgal. The east and west high anomalies are separated by low anomaly, having negative circular pattern, varies from 52 mgal to 89 mgal, and the low anomaly is located in the central area. The high anomaly patterns might be caused by andesite intrusive rocks in Karangbolong and Kulon Progo High areas, and Pratertier rock in Karangsambung area. Gravity value of Luk Ulo Complex (114 mgal) is lower than the value of intrusive rocks (145 mgal), meanwhile the negative anomaly indicates sedimentary basin. Karangbolong and Kulonprogo high and the basin are seperated by faults, such as Karangbolong and Purworejo Faults respectively. Keywords :  gravity anomaly, positive circular pattern, negative circular pattern, andesite intrusive rock, sedimentary basin, Luk Ulo Pratertier rocks, Karangbolong Fault, Purworejo Fault, Karangbolong High, Kulon Progo High.  
COAL CHARACTERISTICS OF SAROLANGUN - PAUH REGION: Implication for Coalbed Methane potential Permana, Asep Kurnia
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 6 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The world energy crisis has effected the Indonesian energy supply, inspite of  Indonesia is rich in another potential geo- resources, such as Coalbed Methane (CBM), which can be used for solving this crisis. The geology and coal characteristics of the Muaraenim Formation in Sarolangun - Pauh region, suggest that the Coalbed methane resource in this area is prospective. Detailed organic geochemical and petrographical study, using fresh surface and subcrop samples of coal was conducted. Petrographically, the coal mainly consists of vitrinite group, and is essentially composed telovitrinite, telocolinite, and detrovitrinite, with rare to sparse inertinite, and minor exinite and mineral matter. A geochemical result indicates the range of volatile matter content is from 13.39% to 33.50%, total sulphur from 0.11 to 2.38%, ash between0.68% and 52.4%, and moisture 18.01 up to 40.18% , with vitrinite reflectance values ranges from 0.35% to 0.47% . Furthermore the feature of micro-cleats or micro-cracks from SEM analysis are dominated by strike lines although some curved and sub-curved lines are also present. Open microcleats are predominant compared to close microcleats. Based on Barbara and Winter diagram, coalbed methane content derived from the Sarolangun- Pauh coal seam is expected to be low - moderate level, with methane content is present from 2.89 m3/t to 6.02 m3/t. SBC coalfield area shows that gas content is around 338.001, 354.6234 scf, Lubuk Napal is 743.232.370, 6576 scf, whilst the Sungai Dingin about 419.343,508.7245 scf. Keywords : coal characteristics,  Sarolangun-Pauh  Region, coalbed methane (CBM).
PENGARUH TEKTONIK DAN IKLIM TERHADAP PERUBAHAN LINGKUNGAN ENDAPAN KUARTER DAERAH SUMPUR, SUMATERA BARAT Mulyana, Herman; M.Lumbanbatu, Ungkap; Moechtar, Herman
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 6 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Based on the depositional environment, the Quaternary deposits in the study area can be divided into five groups, i.e : (a) fluvial-channel deposits, (b) floodplain deposits (c) lake deposits, (d) transition/ tidal deposits, and (e) swamp deposits. Furthermore, this Quaternary deposits represent 3 (three) depositional intervals, namely Depositional Interval I-III.The development of the Quaternary environment and changes of basin fill in the research area were influenced by tectonic and climatic changes. Changes in climatological conditions, from the humid-subhumid into dry, probably due to global climatic changes following the Milankovitch cycles. While the vertical and lateral changes of environment systems could be influenced by reactivation of Singkarak-Solok fault segment. Keywords: Quaternary, tectonic, climate, environment
SUMBER DAYA ALAM DI KAWASAN PESISIR PULAU NUSA PENIDA DAN SEKITARNYA, KABUPATEN KLUNGKUNG, NUSA TENGGARA BARAT Astjario, P.
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 6 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Nusa Penida, Lembongan and Ceningan islands consist of Pliocene reef limestone at some place. The limestone forms dolomite characterized, white in color and soft. The southern coastal of Nusa Penida Island exposed bedded limestone, re-crystallization and weakened. Karts topography widely spread in this island, however it has been eroded.The coastal zone of Nusa Penida, Lembongan and Ceningan islands have been utilized for sea water tourism and sea grass cultivation. However, these areas still have various renewable energy resources which have not yet been developed optimally. In order to support Renewable Energy Park Programs in Nusa Penida, the current energy of Ceningan strait can be used for electricity power energy. Keywords: coastal, renewable energy, current and limestone.

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