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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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PENENTUAN LOKASI SARANA PENGHUBUNG JAWA - BALI (SELAT BALI) SESUAI DENGAN KONDISI OPTIMAL GEOLOGI KELAUTAN Usman, Ediar
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 4 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

To decide the preferable location of a bridge or tunnel site connecting Jawa - Bali, marine geological survey on the sea floor of Bali Strait encompassing morphology and geology should be taken into consideration. Depression of 140 meters deep as a result of bathymetrical data recording can be observed. Besides this, the result of reflection seismic record gave a clear interpretation about materials constructing the sea floor, which consists of unconsolidated sediments of coral fragments and sands (such as mounded and slump type). The basement rocks were also found in a narrow basin with cliffs of about 100 to 140 metres deep going north - south direction.  Keywords: marine geology, bathimetry, seismic interpretation, bridge location, Jawa – Bali
SEDIMENTOLOGI BATUGAMPING FORMASI RAJAMANDALA DI LINTASAN SANGHYANG, CITATAH, BANDUNG BARAT Maryanto, Sigit
Jurnal Geologi dan Sumberdaya Mineral Vol 22, No 2 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The limestones of the Oligo-Miocene Rajamandala Formation cropped out at Sanghyang section, West Bandung District. Detailed stratigraphic section measured out along this 2.5 km section to predict the development of their depositional environments. This Rajamandala Formation having measured of 180 m thickness, and composed of boundstone, rudstone, grainstone, packstone, wackestone, and comm only deposited at regression basin. This Oligo-Miocene formation was situated at the southern part of the Eurasian continent foreland basin. The depositional environment of [his formation was initiated in core-reef to fore-reef slope facies. The deposition becomes interbeded of fore-reef slope to reef-flank facies with several core-reef facies. Due to regression event, the depositional environment change and jinalized by slope and shelf edges facies of carbonate platform.Keywords: Core-reef, fore-reef, reef-flank, slope and shelf edge.
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.  
Penafsiran Struktur Geologi di Daerah Gunung Batu Lembang Berdasarkan Korelasi Data Permukaan dan Geofisika Junursyah, G.M. Lucki; Agustya, Geni
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 3 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Gunung Batu  is composed by andesite dike intrusion rock, leaning towards the north formed a scarp, as part of the Lembang Fault that extends towards the west-east. The subsurface geological structure conditions and its relations to sedimentation in the western part is not clearly understood yet. For more detail investigation, it is necessary to conduct geophysical measurements of 2D Resistivity to interpret the lithostratigraphy vertically and geomagnetic to determine the lateral distribution of lithological boundary. Furthermore, geological investigation is applied by measuring the joints of Gunung Batu's scarp. The subsurface geological structure conditions and its relations to sedimentation in the western part is not clearly understood yet. For more detail investigation, it is necessary to conduct geophysical measurements of 2D Resistivity to interpret the lithostratigraphy vertically and geomagnetic to determine the lateral distribution of lithological boundary. Furthermore, geological investigation is applied by measuring the joints of Gunung Batu's scarp. The second order fault formed as dextral-normal oblique fault lineament relative to the 310°-0° (northwest-southeast) and sinistral-normal oblique fault lineament relative to the 0°-40° (northeast-southwest). This fault is assumed dominantly influenced by the extensional force.Keywords: Gunung Batu, Lembang Fault, 2D resistivity method, Geomagnetic method.
MIKROZONASI BAHAYA GEMPA BUMI DI WILAYAH KOTA BANDUNG BERDASARKAN DATA MIKROTREMOR Marjiyono, Marjiyono; Afnimar, Afnimar
Jurnal Geologi dan Sumberdaya Mineral Vol 21, No 1 (2011): Jurnal Sumber Daya Geologi
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Abstract

Bandung is one of the metropolitan city which rapidly developed and tectonically located in the vicinity of active tectonic lines. The surface geology condition of this region vary from very soft sediments to hard volcanic rocks. The soft sediment area has potential to experience amplification when an earthquake occure. Characterization of surface geology is necessary to identify vulnerability level in order to mitigate the earthquakes hazard in this region. In this regard, we have conducted microtremor measurements in 97 sites which are spread throughout the city of Bandung. Data processing is based on the Nakamura method (HVSR) to obtain the value of amplification factor. The results show the value of amplification factor ranged from 2.1 to 17, with the highest amplification factor distribution in the southeastern of the research area. Distribution of this very high amplification factors are broadly corresponded with lacustrine sediment (lake sediment). The amplification factor scores were then used as the basis in determining the level of relative vulnerability to earthquake hazards.Keywords : microtremor, effect of surface geology, amplification factor, Nakamura methods.
Pleistocene Reptiles of The Soa Basin (Flores, Indonesia): Adaptation and Implication for Environment Setiyabudi, Erick
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 2 (2016): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

The presence of fossil reptiles from the mainland of Asia, such as: giant tortoise (Megalochelys sp.), fresh water turtle (Geoemydidae), crocodile (Crocodylus sp.) and the komodo dragon (Varanus komodoensis) in the Soa Basin of Flores, supports the hypothesis that Wallace's line is not a demarcation line between the reptilian fauna from Asia (Indo-Malayan region) and that from Australia (Austro-Malayan region) in the reptiles came to Flores about 1 million years ago, or perhaps earlier (during the Pleistocene), by sweep stake dispersal through swimming or floating. After arrived, they lived in isolated conditions and adapted to a savannah environment. Nevertheless no morphological changes with their Asian mainland ancestors could be found.
Karakteristik dan Diagenesis beberapa Percontoh Batuan Oil Shale Formasi Kasiro Terpilih, di Jambi dan Sumatera Selatan berdasarkan Scanning Electron Microscope (SEM) Hermiyanto, Mohammad Heri; Panggabean, Hermes
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 6 (2006): Jurnal Sumber Daya Geologi
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Abstract

Oil shale, as one of alternative energy resources, is recognized in the Late Eosen - Oligocene Kasiro Formation, located in the Rawas Ulu and Batang Asai areas. Based on SEM analysis, the shale  consists of smektite-illite, illite,  kaolinite, organic matter as liptinite (sporinite,and alginite) and contains oil droplet.The oil shale is composed of smectite-illite and illite characterised by wavy parallel fissile,while kaolinite clays show irregular shape characters. The shale has undergone a diagenetic process within an early mesodiagenetic level. Organic matter maturity level of the oil shale, in general, is the immature up to early mature. Keywords : oil shale,clay minerals,smectite-illite,  organic matter
DELINEASI CEKUNGAN BUSUR MUKA SIMEULUE BERDASARKAN DATA ANOMALI GAYA BERAT Santi, Lauty Dwita; Setiadi, Imam; Panggabean, Hermes
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 3 (2010): Jurnal Sumber Daya Geologi
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Abstract

The study of hydrocarbon potential at the fore-arc basins of west offshore Sumatra has been done by many writers. Recently, Simeulue basin, has been put at the spotlight as the Germany's BGR research team published several latest seismic lines showing great sediment accumulation in this basin. Although many new information and speculation emerge by the result of that research, until now the exact basin boundary itself has never been discussed. Delineation process of Simeulue basin in this study is done by applying gravity anomaly data that covers a wide area enough to determine the apparent boundary of sediment distribution within the basin. A gravity anomaly profile is produced using forward modeling method, showing the geometry of the basin, with maximum length of 418 km. The northward and southward of this basin is bounded by hightopographies that separate Simeulue basin with the other adjacent basins.Keywords : Basin delineation, Gravity anomaly
LONGSORAN RAKSASA GUNUNG API MERAPI YOGYAKARTA – JAWA TENGAH Bronto, Sutikno; Ratdomopurbo, Antonius; Asmoro, Pudjo; Adityarani, Malia
Jurnal Geologi dan Sumberdaya Mineral Vol 15, No 4 (2014): Jurnal Geologi dan Sumberdaya Mineral
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Abstract

Longsoran raksasa merupakan longsoran sangat besar kerucut gunung api komposit ke arah tertentu sehingga membentuk kawah bukaan tapal kuda, yang dihadapannya terlampar endapan berbentuk topografi gumuk. Penyelidikan lapangan di daerah Godean dan sekitarnya, Kabupaten Sleman Yogyakarta telah menemukan endapan longsoran raksasa dari G. Merapi, yang membentuk topografi gumuk di tepi utara perbukitan batuan gunung api purba Godean. Sebaran sisa endapan longsoran Merapi itu menutupi area berukuran 2 km x 2 km dan ketinggian gumuk kurang dari 30 m di atas dataran di sekitarnya. Endapan longsoran masih sangat lepas, berupa fasies bongkah berlapis, yang tersusun oleh endapan piroklastika, aliran lava dan endapan rombakan. Seluruh endapan mengalami frakturasi sangat kuat, membentuk rekahan gergaji dan sesar minor sebagai akibat gerakan longsor. Endapan longsoran ini dapat terawetkan karena membentur dan tertahan oleh perbukitan batuan Tersier Godean. Dari G. Merapi sampai Godean endapan longsoran itu bergerak sejauh 30 – 35 km dengan volume mencapai 10 km3 dan daerah terlanda mencapai 300 km2. Ke arah selatan, material longsoran berubah menjadi aliran lahar, yang melanda daerah Bantul sampai di wilayah Pandak, berjarak 50 km dari G. Merapi. Di bagian barat lahar mengalir melalui K.Progo dan di sebelah timur mengikuti K. Bedog. Di bagian tengah endapan lahar tertahan oleh perbukitan batuan Formasi Sentolo sehingga menyisakan banyak bongkah besar andesit di wilayah Sedayu. Untuk mengantisipasi terulangnya bencana katastrofik longsoran G. Merapi pada masa mendatang diperlukan mitigasi yang lebih seksama.Kata kunci: Godean, longsoran raksasa, lahar, Merapi, Yogyakarta
LITOSTRATIGRAFI PEGUNUNGAN SELATAN BAGIAN TIMUR DAERAH ISTIMEWA YOGYAKARTA DAN JAWA TENGAH Surono, Surono
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 3 (2009): Jurnal Sumber Daya Geologi
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Abstract

the central part of the Southern Montains, which extends east-west from Parangtritis (Yogyakarta) to Baturetno Plain (Wonogiri, Central Jawa), is typically formed by clastic and carbonate sediments with volcanic rocks. Volcanic activities had been very intensive during Late Oligocene - Early Miocene. Based on their lithologies, the Southern Montains can be divided into: pra-volcanic, volcanic and postvolcanic (carbonate) periods. The rocks formed during pre-volcanic period are as the basement of the rocks which were formed during the volcanic period. Results geological mapping/study in this Southern Montains are pesented in this paper, e.g. similar formations can be divided into smaller lithologic unit, therefore the formations can be proposed into groups. Key words: Southern Montains, lithostragraphy, volcanism period, basement rocks

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