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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 5 Documents
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Search results for , issue " Vol 17, No 3 (2007): Jurnal Sumber Daya Geologi" : 5 Documents clear
PENELITIAN BIOSTRATIGRAFI MESOZOIKUM PULAU ROTE, NUSA TENGGARA TIMUR Hasibuan, Fauzie
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 3 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei 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
SEDIMENTASI SEBAGAI DILEMA PENGEMBANGAN PELABUHAN NUSANTARA DI PERAIRAN LASEM JAWA TENGAH Ilhaude, Delyuzar; Usman, Ediar
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 3 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The studied area is geographically located on the northern coast of Jawa, which is an open beach influenced by wave action from the northwest and northeast direction. The erosion process occurs relatively in the northeastern coastline of the Lasem area. Sediment supply from the northeastern of Lasem tends to be deposited in the central and the southwestern part of the studied area. The thickness of sediment of subsequence B4 on line L-1 in the southwestern part of the studied area is thicker compared with subsequense B4 on the line L-17 of the northeastern part of the studied area. The eastern part of Lasem can be developed as a harbor area. Keywords : bearing capacity, sediment supply
PENAFSIRAN STRUKTUR BAWAH PERMUKAAN DAERAH BANGKA UTARA, BERDASARKAN ANOMALI GAYA BERAT H.Simamora, W.
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 3 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The gravity measurement carried out in the North Bangka Quadrangle has produced 1:250,000 Bouguer anomaly, regional and residual gravity maps. Bouguer anomaly values range from 5.0 to 39.0 mgal, regional anomalies arebetween 13.0 until 35.0 mgal and residual anomalies are from -7.0 to 10.0 mgal. The Bouguer anomalies aredivided into three types, i.e : low, medium and high, while the residual anomaly is categorized as positive and negativeareas.The modelling result of three sections of residual anomaly shows that the density of 2.69 gr/cc and interpreted asPemali Complex belongs to the basement in the area. This basement is Pemali Complex which is intruded by rocks with densities of 2.54 ; 2.56 and 2.58 gr/cc and indicated as granitic intrusion. Boundary between Pemali complex, Tanjunggenting formation and granitic intrusion is fault contact. This contact could be potential for secondary tin deposit resulted from weathered granite. Keywords : gravity, residual anomaly, density, tin deposit, Bangka
KONTROL STRUKTUR PADA POLA “ZIG-ZAG” ALIRAN SUNGAI KAYAN DI DAERAH PESO, KALIMANTAN TIMUR Baharuddin, Baharuddin; Wahyudiono, Joko
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 3 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Peso Area is situated at the downstream of Kayan River, East Kalimantan. The area is generally occupied by a flysch-type deposit of Cretaceous Rajang-Embaluh Group. The unit is unconformably overlain by the Tertiary Sediments and is intruded by the Tertiary-Quaternary magmatics. Based on interpretation of landsat imagery, lineament features which represent faults can be traced outside the studied area. Based on landsat imagery data and result of joints, fault and fold analyses, it can be concluded that the zig-zag pattern of the Kayan River at Peso area is closely related to major faults movements. These faults are generally trending NE- SW and NW-SE. Keywords : structural control, zig-zag patterns, Kayan River
MORFOTEKTONIK DAN REAKTIVITAS SESAR SUMATERA DI PADANGPANJANG, SUMATERA BARAT Poedjoprajitno, S.
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 3 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Studies on tectonic morphology in the Sumatera fault zone at Padangpanjang segment by using lineament analysis on transect and landsat image have recoqnized some tectonic landform features. These features are among others,curvature of Kubu ridge line, eroded faultscarp, alignment of Kayutanduk sagpond, Kotobaru sagpond, Talago sagpond, Tanang River, and Airanget and Gadis River fault valley at Batipuh village and surrounding area.  Keywords : tectonic landform, morphostructure, morphotectonic

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