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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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ANOMALI GAYA BERAT, KEGEMPAAN SERTA KELURUSAN STRUKTUR GEOLOGI DAERAH JOGJAKARTA DAN SEKITARNYA S.Widijono, Bambang; Setyanta, Budi
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 2 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The region of Jogjakarta and the surrounding area which are generaly covered by young sediment, consist of aluvium and volcanic deposits. Because of this phenomenon, lateral and vertical distribution of geological structural element are still unknown. Therefore, gravity data analysis is a good tool to delineate geological structural element burried by young sedimentdeposits. Regional and local geological structural lineaments which are detected by Bouguer and residual gravity anomaly analyses, inform that deformation processes have occurred intensively in this area. The occurrences of east-west trending fold and northeast-southwest trending thrust fault, northwest-southeast trending strikeslip fault, and north-south trending normal fault indicate that deformation process was caused by north-south compressional principal stress generated by subduction Eurasian plate and Indo-Australian plate. Gravity modelling analysis of AB and CD sections indicate the presence of strike slip fault, thrust fault and normal fault within the basement and Tertiary rocks. Several faults, such as Bogowonto, Nanggulan, Sentolo, Imogiri and Opak Faults, are interpreted to be reactivated and faulted the Quarternary deposits. Earthquake hazard that took place in Jogjakarta and th surrounding area on May 27 , 2006 by the reactivation of Opak Fault. Referring to this experience, the study of active faults in this area is necessary. Keywords : anomaly, gravity, geological structure, earthquake
ACUAN STANDAR INTERNAL GEOKIMIA DENGAN MATRIKS STREAM SEDIMENTS WILAYAH SOREANG, JAWA BARAT Irzon, R; Kurnia, Kurnia
Jurnal Geologi dan Sumberdaya Mineral Vol 23, No 1 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Certified reference materials are needed in producing a good validity level of measurement process. The closer analytical result of CRM to its certificated value, the better quality of measurement would be. This studi was aimed to produce internal reference material in three kinds of stream sediment matrixes: the first is considered as natural stream sediment, the second suggest to be affected by industrial and anthropogenic actifity, and the last one was taken near by conventional gold mining location. All about sampling location, geological setting and megascopic description of the samples had been collected and saved properly. The three stream sediments samples were homogenized manually and separated in to some split bottles and were prepared and analyzed chemically to show their homogeneity. An Atomic Absorbance Spectrometry and X-Ray Floresence are used to analyze the samples for tatally nine times. Measurement results show that these in-house reference materials are in good level of homogeneity and many chemical elements can be used as a reference value with coefficient of variance <5%. Several factors influence the type of sediment are also reflected in the value of the elements content of each sample, where each example shows the content of the element in accordance with the factors that affect the flow of sediment respectively. This study could be continued further to produce a national reference material in stream sediments matrix.Key words: : in–house reference material, stream sediments, AAS, XRF
POLA CEKUNGAN DAN STRUKTUR BAWAH PERMUKAAN DITINJAU DARI HASIL ANALISIS GAYA BERAT DAN MAGNET DI DAERAH BANJARNEGARA, JAWA TENGAH BAGIAN SELATAN Hutubessy, Simon
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 4 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Density of rocks of 2.85 gr/cm3   and magnet susceptibility of K=0.00023 e.m.u are interpreted as pre-tertiary basement, assumed to be transformed granite rocks. This basement underlies densities of rocks and magnet susceptibilities as follows: 2.74 gr/cm3  and K=0.000036 e.m.u, 2.66 gr/cm3   and 0.0 e.m.u, 2.43 gr/cm3   and K=0.03230 e.m.u, and 2.42 gr/cm3 and K=0.01458 e.m.u, interpreted as Tertiary sediment rocks around 1.5 to 6 km in thick, and Quarter sediment rocks such as: Jempangan volcanic rocks (Qjo), members of Ligung Formation Clay (Qtlc), members of Ligung Formation braccia (QTlb), terrace deposit (Qt), and alluvium (Qa). These basement and sediment rocks are intruded by density of rocks and magnet susceptibility; 2.84 gr/cm3   and K=0.00033 e.m.u, interpreted as igneous diorite rocks, as seen at C-D section and many are revealed in the researched area.Basins in the researched area are generally in direction of southwest-northeast, southeast-northwest, and also west- east due to a normal fault occurring in the researched area.The structure of strike slip  fault occurring in this area is generally in the directions of nearly north-south, southeast- northwest, and esat-west. Thrust faults in this area exist to the northwest of Banjarnegara, of southeast-northwest direction, with movement direction to the south. Thrust faults also exist to the south of the fault direction generally west- eats, and have movement direction to the north.Keywords: basement, Serayu valley, basin pattern, underground structure, Banjarnegara
Karakteristik dan Lingkungan Pengendapan Batubara Formasi Warukin di Desa Kalumpang, Binuang, Kalimantan Selatan Novita, Dian
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 3 (2016): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Batubara masih menjadi salah satu sumber energi utama di Indonesia, utamanya sebagai pemasok energi pembangkit listrik. Formasi Warukin menjadi salah satu formasi pembawa batubara dalam kuantitas besar di Cekungan Barito. Berdasarkan litostratigrafi dan pengeplotan nilai TPI (Total Presevation Index) dengan GI (Gelification Index) dalam diagram fasies Diessel menunjukkan bahwa lingkungan pengendapan batubara Formasi Warukin merupakan daerah delta dan dataran banjir yang masih kaya akan pasokan sedimen produk endapan crevarsse splay. Dari nilai reflektansi vitrinit menunjukkan batubara berada pada peringkat lignite (0.29) hingga high volatile bituminous C (0.49). Berdasarkan zona pembentukan hidrokarbon, peringkat batubara dengan nilai 0.49 telah berada pada zona awal pembentukan minyak. Dengan demikian ada indikasi kematangan batuan sumber untuk hidrokarbon dari Formasi Warukin 
Hubungan Keberadaan Runtunan Ofiolit dengan Konsentrasi Unsur Logam dalam Endapan Sungai Aktif di Daerah Pelaihari, Kalimantan Selatan Baharuddin, Baharuddin
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 4 (2006): Jurnal Sumber Daya Geologi
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Abstract

Pelaihari and its surrounding area which belong to the Tambak-Tamban- Bobaris Zone are part of the western limb of the Meratus High. The area has significant metalliferous mineral prospects. Geologically, the area is occupied by ultramafic, intrusive, volcanic, sedimentary, and metamorphic rocks with ages range from Mesozoic to Tertiary. The results of geochemical analyses of active stream sediment samples in this area indicate a close relationship between the distribution of the rocks and concentration of metallogenic elements within the stream sediment samples. Concentration of nickel (Ni) and copper (Cu) elements increase within the stream sediment in the northeastern area while platinum (Pt) and cobalt (Co)show a significant high concentration value in the southern area except Co which also has a high concentration value in central and northeastern area. This high metallogenic concentration presumably derived from the existence of ophiolite sequence in this area. Keywords: Ophiolite sequence, active stream sediment, concentration of metallogenic elements
GEOLOGI KUARTER DATARAN PANTAI BREBES DAN SEKITARNYA, JAWA TENGAH: Respon Terhadap Peta Geologi Kuarter dan Implikasinya Terhadap Iinformasi Kondisi Geologi Holosen Mulyana, Herman; Basri, T. Chairil; Moechtar, Herman
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 1 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

A study on Quaternary deposits in the coastal-plain of Brebes and surrounding area, Central Java, revealed eight depositional environments. They are: tidal flat (Tf), shallow marine (Sm), floodbasin (Fb), floodplain (Fb), paleochannel (Cp), Resent channel (Cr), mangrove swamp (MgS), and beach sand (B). Based on the correlation of the lateral and vertical variation of the depositional environment, tectonic activities and sea level changes were recognized. During the depositional processes, the activity of tectonic by thrust were recorded as the main factor controling global sea level fluctuation of Holocene. The result of this research is an input for the Quaternary geology study and its implications on Holocene geology conditions which is based on the Quaternary geologic mapping. The study was based on the Quaternary geologic mapping with 1:50,000 scales including an analysis of sedimentology and stratigraphy of sixty boreholes information from the coastal plain of Brebes and surrounding areas.Keywords: Quaternary geologic mapping, Holocene, coastal plain
Dinamika Dan Evolusi Cekungan Ketungau Kalimantan Barat Berdasarkan Metode Gayaberat Panjaitan, Saultan
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 2 (2015): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Di Cekungan Ketungau telah ditemukan rembesan migas di Sungai Sinaning, di hilir Sungai Puturau dan Sungai Ara. Sampai sekarang migas belum ditemukan didaerah ini sehingga dilakukan penelitian gayaberat untuk melokalisir struktur perangkap antiklin yang terkait dengan waduk migas. Hasil penelitian gayaberat anomali Bouguer dapat dibagi kedalam dua (2) kelompok yaitu: Kelompok anomali gayaberat 16 mGal hingga 58 mGal dibentuk oleh tinggian Semitau dan kelompok anomali gayaberat 8 mGal hingga 16 mGal adalah cekungan batuan sedimen. Pada anomali sisa lebar cekungan ± 35 km, panjang ± 60 km dan ketebalan ± 5000 m arah barat-timur. Cekungan Ketungau dikontrol oleh sesar naik dan sesar normal membentuk amblesan, sehingga sulit terbentuk antiklin lokal sebagai perangkap migas didalam cekungan itu sendiri. Struktur yang terbentuk terdiri dari sesar naik, sesar normal arah barat-timur dan sesar geser arah utara-selatan memotong sesar naik. Cekungan Ketungau terbentuk pada busur muka saat Kalimantan berrotasi mengiri sejak Oligosen-Miosen sebesar 60º pada deformasi fase ketiga. Batuan alas diduga ofiolit atau sedimen samudera dengan rapat massa 3.1 gr/cm³ yang mengalami pematahan bongkah.Kata kunci - Gayaberat, cekungan, gas, anomali sisa, rapat massa, sesar, antiklin, sinklin, batuan alas, rotasi, deformasi, paleomagnetik.
THE POSSIBILITY OF HYDROCARBON TRAP AND ITS POTENTIAL IN THE NORTH BONE BASIN, BASED ON GEOLOGICAL AND GEOPHYSICAL DATA Siagian, Hari P; Widijono, Bambang Suci
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 1 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Based on the analysis of geological and geophysical data, it can be informed that investigated area is the sedimentary Bone basin formed since the beginning of the Tertiary age and developed through Paleogen to the Neogene. The basin is defined as a fore-arc basin underlain unconformable by pre-Tertiary basement rocks comprising metamorphics, volcanics, metasediments (the Laitimojong and Pompangeo Complexes). The hydrocarbon occurrence in Bone Basin showed by gas seeps in the surface are located in Pongko and Malangke villages. Some hydrocarbon traps such as structures and stratigraphy are shown in the seismic profiles. Abundant coarse clastic and limestone deposits such as the fluviodeltaic of Toraja and Lamasi Formations may plays as good reservoir in the basin. claystone within the Lamasi Formation and shale within the Toraja Formation predicted as petroleum source rocks in the area. The seals in the basin considered as the existence of numerous claystone and siltstone horizons within the Bone Bone Formation that is also indicated by the drilling results. Keywords : sedimentary basin, hydrocarbon potential, trap, Bone Basin 
GEOCHEMISTRY OF THE JELAI VOLCANICS FROM MOUNT RIAN EAST KALIMANTAN: Implications for the magma compositional gap Sulistyawan, R.I H; Baharuddin, Baharuddin; Hartono, U
Jurnal Geologi dan Sumberdaya Mineral Vol 23, No 3 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The Jelai volcanics are exposed at Mount Rian and the surrounding area, northeastern part of Kalimantan. Major, trace and rare earth element data are presented. The volcanics consist of basalt to andesite with silica content ranging from about 52 to 63.5 wt%. Fractional crystallization involving olivine, pyroxene, plagioclas, and magnetite may resposible for the geochemical variation in the volcanics. However, there is a silica gap about 5wt% between basaltic andesite and andesite. Two trends of fractionation are observed, i.e., the tholeiitic and calc-alkaline trends in the basaltic and andesitic magmas respectivelly. Precipitation of magnetite, as a new phase, in the andesitic magma might change the fractionation from tholeiitic to calc-alkaline trends. Initial crystallization of Fe-Ti magmentite, pyroxene and plagioclase, that produce a rapid compositional change in the residual basaltic andesite to andesite liquids over a small temperature interval would cause a compositional gap.Keyword : Mount Rian volcanics, geochemistry, compositional gapAbstrak
KARAKTERISTIK BENTANG ALAM DAERAH PAYAKUMBUH, SUMATERA BARAT M.Lumbanbatu, Ungkap
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 2 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The landscape of Payakumbuh and the surrounding area is characterized by the influences of volcanic and tectonic origins as well as by geological processes like weathering, erosion, sedimentation and solution. The landscape which is built up by the product of Marapi and Malintang Volcanoes, occupies the central part of the investigated area. The landscape of volcanic origin was then affected by tectonic activities producing lineaments that are assumed as active faults. These faults which are in NW-SE direction, seem to have the same direction as the Takung River Fault Zone. Based on its geomorphological characteristics and processes, the landform of the investigated area can be distinguished into volcanic, fluvial, fluvio-volcanic, denudational, structural and karst origin. It can be concluded that morfogeneticly the investigated area has been formed by endogen and exogen prosesses. Exogen prossesses produced the denudational, fluvial, and kars origin, while endogen process produced the structural and volcanic origins. Keywords: landscape, landform, volcano-tectonic origin, structural origin.

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