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Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Published by Pusat Survei Geologi
ISSN : 08539634     EISSN : 25494759     DOI : https://doi.org/10.33332
Core Subject : Science,
Chemistry Earth & Planetary Sciences Energy
The JGSM acts as a publication media of high quality scientific investigations resulted from various geological scientific issues. Published articles covers Geo-sciences, Geo-resources, Geo-hazards, and Geo-environments. Geo-sciences are basic earth sciences in geology, geophysics, and geochemistry. Geo-resources are applied earth sciences scoping in geological resources. Geo-hazards are applied earth sciences concerning in geological hazards. Geo-environments are applied earth sciences focusing in environmental geology.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 482 Documents
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NEO-SEISMOTEKTONIK SEMENANJUNG MANADO SULAWESI UTARA S. Poedjopradjitno
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 4 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i4.118

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 Surono Martosuwito
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 4 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i4.119

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; sam permanadewi
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 4 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i4.120

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 Ronaldo Irzon
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 4 (2012): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i4.121

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 Hermes Panggabean; Lauti Dwita Santy
Jurnal Geologi dan Sumberdaya Mineral Vol. 22 No. 4 (2012): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v22i4.122

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
Struktur Geologi Bawah Permukaan Cekungan Bintuni Berdasarkan Data Gaya Berat Accep Handyarso; Tatang Padmawidjaja
Jurnal Geologi dan Sumberdaya Mineral Vol. 18 No. 2 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v18i2.125

Abstract

Bintuni Basin is one of the giant basins in Eastern Region of Indonesia (KTI). Until now there are only few oil and gas production fields in the Bintuni Basin. This case prompted the government to accelerate the discoveries of new oil and gas reserves in Eastern Region of Indonesia, particularly in the Bintuni Basin. Gravity method is one of geophysical method that is commonly used in preliminary studies of sedimentary basins. Bouguer anomaly obtained is reduced by using an average density based on the Nettleton method. Regional–residual anomaly separation is performed based on the spectral analysis. Residual anomaly showed anticline closures with a northwest–southeast directions, and also there are indication of some strike–slip faults which are expected as the result of the compression due to the Pacific Oceanic Plate and the Australian Continent Plate movement. The result from spectral analysis showed that the average depth of the bedrock is up to 6.5 km. Based on the 2.5D subsurface geological structures estimation indicates shallowing basement toward Mogoi and Kamundan district area with some fault structures that allows migration of the hydrocarbon from Pratertier source rocks to the Kais reservoir. Keywords: Bintuni Basin, Bouguer, Residual, SpectralAnalysis, Anticline  
A Stegodon Mandible from Cipanaruban, Subang, West Java; Description and Its Position in the Java Vertebrate Biostratigraphy Unggul Prasetyo Wibowo; Erik setiyabudi; Iwan Kurniawan
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 1 (2018): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i1.126

Abstract

Abstract - This paper describes a fossil of a right mandibular ramus with nearly complete molar M2 of Stegodon from a cliff of a hill of Cipanaruban River, near Pasir Cabe, about 6 km to the East of Subang City, West Java, Indonesia. The specimen is a surface collected, however the attached matrix on mandible indicated that this specimen is mostly derived from the sandstone unit of the Citalang Formation. The age of this fossil is estimated to be around Late Pliocene to Early Pleistocene based on the mammalian biostratigraphy of Java.Keyword : Stegodon, mandible, Late Pliocene - Early Pleistocene, fossil, Subang.
Model Fasies Batuan Karbonat Formasi Wainukendi di Cekungan Biak-Yapen, Papua Asep Kurnia Permana; Joshua Shima; Sigit Maryanto; Joko Wahyudiono
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 2 (2019): Jurnal Geologi dan Sumberdaya Mineral
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i2.129

Abstract

This paper provides the carbonate rocks facies model of the Wainukendi Formation. Several outcrops are well exposed in the Southern part of the Supiori Island. The main data are taken from 28 outcrops and 25 measured sections. Thirty seven rocks samples from the Korido dan Warvey Sections were collected and have been petrographic examination for microfacies analysis. Finally, the analysis find that the Wainukendi Formation basically composed by bioclastic carbonate platform and reef margin platform. Microfacies analysis indicate that these carbonate platforms consist of 4 facies zone, deep shelf (FZ2), toe of slope (FZ3), slope (FZ4), and platform margin (FZ5). Keywords: Facies, stratigraphy, Wainukendi Formation, Biak-Yapen Basin.
IDENTIFIKASI ALUR SUNGAI PURBA DAN ENDAPAN PLASER DI PERAIRAN LEMBAR PETA 1612 KALIMANTAN SELATAN Lukman Arifin
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 1 (2011): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i1.130

Abstract

Placer deposits is suggested to be within the paleo channels present in the study area. It can be identified from high resolution single channel seismic profiles. These paleo channels occurred within sequence D and marked by the presence of cut and fill characters on the seismic record. The placer were deposited during the activity of paleo channel in the regression period. Placer deposits are probably derived from igneous and metamorphic rocks of Mesozoic age found around the Meratus Mountain as the source of Recent placer deposits. The sediments composed of quartz and clay minerals such as kaolinite and montmorilonite.Keywords: placer, paleo channel, quartz, clay mineral, South Kalimantan
PETROLOGY AND GEOCHEMISTRY OF THE UPPER MIOCENE VOLCANICS ON THE WESTERN PART OF BARISAN MOUNTAIN RANGES, LUBUK SIKAPING REGION, WEST SUMATRA Bhakti Hamonangan Harahap
Jurnal Geologi dan Sumberdaya Mineral Vol. 21 No. 1 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v21i1.131

Abstract

Andesitic and basaltic lavas are the main product of the upper Miocene volcanic activities in Lubuk Sikaping region. They posses vesicular and amygdales structure, dark grey to black in colour, highly porphyritic in texture composed of plagioclase, clinopyroxene, orthopyroxene, olivine (in basalt only) and minor hornblende, magnetite and ilmenite. They (basalt and andesite) mostly fall within the calc-alkaline series on the AFM. The basalt and andesite are not primary magma since they have low Mg# and Ni contents. The lavas resemble the typical of arc setting with Nb through on the spider-diagram patterns, enrichment in large ion lithophile elements and light rare earth elements relative to high field strength elements and heavy rare earth element. They are co-magmatic as shown by the REE pattern. The lavas have high concentration of Ba, Sr, La, Rb and Ce, Zr, Th and U, and high Ba/La ratio which indicating an involvement subducted sediment in their generation. The lava from Lubuk Sikaping is product of Maninjau Crater eruption in Upper Miocene. This lava was uplifted and exposed on high level topography for a few million years, and then superimposed by a high-K calc-alkaline volcanic of mainly rhyolitic tuff as a result of the reactivation of the Maninjau Crater in Pleistocene.Keywords: petrology, geochemistry, calc-alkaline, Lubuk Sikaping, tectonic

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