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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 5 Documents
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Search results for , issue " Vol 22, No 4 (2012): Jurnal Sumber Daya Geologi" : 5 Documents clear
NEO-SEISMOTEKTONIK SEMENANJUNG MANADO SULAWESI UTARA Poedjopradjitno, S.
Jurnal Geologi dan Sumberdaya Mineral Vol 22, No 4 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Neo-Seismotectonic study of Manado Peninsula by using approach of geomorphology, geology data method and seismisity, obtained of picture in detail peninsula structure pattern and can interpret earthquake susceptable disaster zona. Such structure pattern is area grouped of peninsula structure become six domain structure, that is : Amurang domain structure (A), Soputan (S), Tondano (T), Manado (M), Likupang (L) and Batuangus ( BA).Based on susceptable the earthquake disaster matrix covering geomorfologi data, geology, ground and rock physical, tectonic indication, infrastructure, disaster potency and risk, peninsula area can divided to the three area susceptable to earthquake disaster namely high, middle and lower earthquake disaster susceptable zona.Key word :geomorphology, geology, seismicity and structure
TECTONOSTRATIGRAPHY OF THE EASTERN PART OF SULAWESI,INDONESIA. IN RELATION TO THE TERRANE ORIGINS Martosuwito, Surono
Jurnal Geologi dan Sumberdaya Mineral Vol 22, No 4 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Geologically the eastern part of Sulawesi is the one of the most complex area in Indonesia. It is formed by two difference composition and origin terranes: ophiolite complex and its pelagic sediment cover and continental terranes, both covered by Sulawesi molasse. The ophiolite and pelagic sedimentary cover had been thrusted over the continental terranes during Late Oligocene-Middle Miocene. After the collision, the Sulawesi molasse was unconformably deposited. The ophiolite was formed in a mid-oceanic ridge, within the Pacific Plate. The continental terranes, in the other hand, were originated from the northern margin of the Australian Continent.Key words: Continental fragment, ophiolite, terrane, and origin
INDIKASI BATUAN ADAKITIK DI PACITAN, JAWA TIMUR Baharuddin, Baharuddin; permanadewi, sam
Jurnal Geologi dan Sumberdaya Mineral Vol 22, No 4 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Volcanic and intrusive rocks from Pacitan area cropping out as lavas, dykes and stockworks, consist of basaltic - andesite to rhyolite in composition. Based on petrologic and geochemical analyses, the volcanic rocks consist of SiO2 55.79 – 72.19%, TiO2 0.07- 0.54%, Al2O3 15.43 – 19.46%, MgO 1.38 – 5.09. While trace element contents, especially Sr 78.25 – 845 ppm, Y 36.31 – 11.15 ppm, Yb 1.05 – 2.58 ppm dan Sr/Y 4.41 – 41.40 ppm. Discriminant diagram of SiO2 vs K2O Pacitan volcanic rocks are including the rocks into tholeiitic low – K series. Therefore in trace element spider diagrams show that the rocks are an island arc affinity except one sample relating with OIB. Several samples of Pacitan volcanics are adakitic like which have high Sr and low Y, Yb content.Key words: petrology, geochemistry, adakitic rocks, Pacitan
PERBANDINGAN CALORIFIC VALUE BERAGAM BAHAN BAKAR MINYAK YANG DIPASARKAN DI INDONESIA MENGGUNAKAN BOMB CALORIMETER Irzon, Ronaldo
Jurnal Geologi dan Sumberdaya Mineral Vol 22, No 4 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Calorific value is amount of released energy when a known volume of gas is completely combusted. Now, the market of fuels in Indonesia is not only owned by Pertamina, but there have been many gas stations conducted by foreign companies since 2005. One of the most famous ways to rank the fuels' performance is based on research octane number (RON). A different kind of fuels' calorific value with various octane number sold in many gas stations would be important information for fuel customers. The use of the bomb calorimeter to analyze the calorific value has been published in diverse applications. Although bomb calorimeter is viable to measure the heat content of the liquid, we can not easily find a writing of using the equipment on this kind of sample. The method used here has been successful to measure the calorific values of three liquid samples using bomb calorimeter. This study quantifies calorific value of eight gasoline and five diesel samples of 83 measurements. Statistics measurements of at least six times repetition indicate: the method have very good stability (%RSD = 0.09 – 0.63%), there are differences in colorific value on samples with same octane number produced by different company, increase in octane number also raises the samples' calorific value, and the ratio of fuel's price to their heat content is still lame.Keywords : bomb calorimeter, calorific value, fuel, octane number
SEJARAH PENIMBUNAN CEKUNGAN SUMATERA SELATAN DAN IMPLIKASINYA TERHADAP WAKTU GENERASI HIDROKARBON Panggabean, Hermes; Santy, Lauti Dwita
Jurnal Geologi dan Sumberdaya Mineral Vol 22, No 4 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

South Sumatra Basin is divided into four subbasins, that are Jambi Subbasin, Central Palembang Subbasin, North Palembang Subbasin, and South Palembang Subbasin. Clastic and carbonate sediments had filled the South Sumatra Basin during Eocene up to Quaternary times by various thickness of all rock units in each subbasin ranging from 2100 m to 3500 m. Those four subbasins have shown almost different maximum deep of burial history, that was started from 2900 m up to 5200 m. From burial of maximum depth by over 2000 m, several rock outcrop samples of the Talangakar Formation have evidently compacted, and grain particles as well as minerals of matrix have been proccessed by diagenesis realm. The lowest depth oil generation of the Lahat Formation is 1560 m in the Central Palembang Subbasin, while the deepest in the Talangakar Formation is 2700 in Jambi Subbasin and 2800 m in the South Palembang Subbasin. The timing of hydrocarbon generation has occurred between 20.6 mya (Early Miocene) and 3.38 mya (Late Pliocene). By studying detailed characters of sedimentary rocks filling each subbasin, thus the time of hydrocarbon generation can be known.Keyword : South Sumatra basin, burial history, hydrocarbon generation, Lahat Formation, and Talangakar Formation

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