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Sekretariat Redaksi Jurnal Geologi dan Sumberdaya Mineral Pusat Survei Geologi, Badan Geologi, Gedung A, Lantai 1 Jalan Diponegoro No. 57, Bandung, Indonesia
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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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DINAMIKA BENTANG ALAM DAN PENGARUHNYA TERHADAP ASPEK FISIK LAHAN DAERAH SOLOK –SINGKARAK, PROVINSI SUMATRA BARAT Santoso Santoso; Ungkap M. Lumbanatu
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 2 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i2.165

Abstract

The investigated area of Singkarak and surrounding areas belong to Median Graben at Sumatra Fault Zone. Danau Singkarak is one of the bigest lake in west Sumatra, it has a shape of elongate southeast to northwest in direction. Landform arround Danau Singkarak, are represented by Alluvial Fan (F5), River Terrace (F2), Eroded Structural Terrace (S1), Eroded Fault Scarp (S2), and Undulating Fault Hills (S3). Those landforms are known as tectonic origin (endogen). While far away form Danau Singkarak landforms are represented by exogen origin such as Karst Origin (K1, K2), Denudational Origin (D1, D2, D3) and Volcanic Origin (V2). The landforms on east and west side of Danau Singkarak have difference characteristics. On the east side of Danau Singkarak area landform are characterized by fault scarp which has a very steep slope included landslide, while on west side are characterized by aluvial fan with gently slope. Base on the physical character of tectonic landform, the tectonic activity become higher toward Danau Singkarak which is shown by the alluvial fan produced by Sawah Puding Fault (Karang Alluvial Fan, Airhilang Alluvial Fan, and SaningbakarAlluvial Fan) are being actively till present. This activities also characterized by the destructive earthquake occurrences. Non active alluvial fans distributed far away from Danau Singkarak shuch as the Padanglawas Alluvial Fan, Tanjung Sawah Alluvial Fan and Guguk Alluvial Fan. Those alluvial fans are produced by Air Mundak Fault.Keywards: Singkarak Lake, landform, active alluvial fan, non active alluvial fan, exogen, endogen activity.
KARAKTERISTIK, TIPE DAN BIDANG GELINCIR PADA ZONA LONGSOR CILOTO, JAWA BARAT BERDASARKAN ESTIMASI METODE GEODETIK Vera Sadarviana; Hasanuddin Z. Abidin; Joenil Kahar; Djoko Santoso
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 2 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i2.166

Abstract

Slip surface is delaminates between sliding material and undisturbed slope material. In limit equilibrium method, slip surface is used as reference for safety factor calculation. Landslides phenomenon can be observed using of GPS satellite technology to mitigation and material displacement monitoring. For that purpose, this research is carried out to estimate characteristic, type and slip surface position at Ciloto landslide zone by GPS survey.First, estimation of slip surface is carried out by slope surface profile which referred to same direction of horizontal displacement of monitored points. The same direction of horizontal displacement at several monitored points indicate that the monitored points can be located at the same slip surface. Second, maximum-minimum function of geometric method and polynomial approach, including graphical method by velocity trend line plotting for each monitored point, were done to find out point position at slip surface. Ideal planar slip surface is determined by infinite slope analysis and circular slip surface is determined by circle arc analysis. Estimation of slip surface by geodetic method approach couldn't give result because geodetic data describe slope surface. By intersection of velocity trend line of monitored point, it can gave estimation of slip surface location. Geodetic approach could gave estimation of scarp position as well as crack which is indicate beginning of slip surface. Locations of scarp in vertical profile have suitability with result of geology research at same study area.Ciloto landslide zone is classified in very slow velocity landslide (5 x 10-5 - 5 x 10-7 mm/second). The characteristic of horizontal displacement has various direction for each monitored point. Vertical displacements of monitored point have subsidence and uplift or bulging. That characteristic formed hummocky terrain and the other side of zone have gradual slope. From the research, the landslide type at Ciloto zone is multiple compound (rotational and translational) debris slides.Keywords : geodetic method, GPS survey, landslide characteristic, landslide type, slip surface, multiple landslide, scarp
CHARACTERISTICS OF THE ARAI GRANITE ASSOCIATED WITH THE IRON ORE AND Zn-Cu-Pb DEPOSITS IN MUSI RAWAS REGENCY, SOUTH SUMATERA Hamdan Zainal Abidin
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 3 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i3.167

Abstract

The Arai Granite exposed in the Jangkat District, Musi Rawas Regency, South Sumatra. This rock which is in the form of a stock, is assigned to be Cretaceous in age. Petrographical identification shows that this rock is dominated by quartz, feldspar (plagioclase and orthoclase), biotite with minor hornblende, pyroxene and secondary muscovite of holocrystalline- equigranular textures. On the basis of A/CNK ratio (<1.1), the Arai granite belongs to metaluminous type of calc-alkali composition (K2O/Na2O = 0.9-1.06). The Plot of trace elements indicates that this rock belongs to I-type and falls within VAG/SYNCOLG. This granite is intimately associated with subduction of Indian Ocean and Eurasian Plates. It is characterized by strong depletion of Nb, P and Ti significantly. The Arai granite intrudes the Rawas and Peneta Formations of older ages so that lithology of both formations experienced contact metamorphism (marble and hornfels) and mineralization. The presence of iron ore, Zn-Cu-Pb and gold deposits is closely associated with limestone replacement within those formations. Therefore, these deposits are classified into skarn style.Keywords: Arai granite, pluton, Rawas Formation, Peneta Formation, mineralisation, skarn
COALBED METHANE POTENTIAL AND COAL CHARACTERISTICS IN MUARA LAKITAN AREA, SOUTH SUMATRA Muhammad Heri Hermiyanto; R. Setiawan
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 3 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i3.168

Abstract

A research on Coal Bed Methane (CBM) of the Muaraenim Formation has been conducted in the Muara Lakitan area. Megascopically, the coal lithotype varies from dull to bright banded, with black – brownish black and brownish to black streaks, brittle – friable, dull-greasy luster, even-uneven, dirty on fingers, with resin patch and striation, dirt bands (clay/mud layers), pyrite striation, and pore structures. The coal quality, gained from geochemical analysis, indicates that its ash content ranges between 1.22% and 2.47%, total sulphur content is from 0.15% to 0.3 %, and the volatile matter of 38.02% - 40.81%. The coal is dominated by vitrinite (73.6 – 85.8 %), with minor amount of exinite (1.4 – 4.0 %), inertinite (4.2 – 21 % ) and mineral matter (2.4 – 8.2 %). Vitrinite reflectance, varies from 0.44% to 0.45 %, tends to indicate a sub-bituminous to high volatile bituminous-A coal rank. Kaolinite clays are the most prominent mineral matter within all coal samples analyzed, although the clay textures show irregular shapes. Iron oxides are also present in several samples. Microcleats found within the coals are mostly open, and are rarely filled by clay minerals. Based on Barbara/Winter diagram, the methane gas content in the studied area ranges from 0.57 m3/t – 1.70 m3/t = 20.44 scf/t – 60.96 scf/t. The total reserve of gas within six coal seams in the studied area is 15.524,28 scf.Keywords : Coal Bed Methane (CBM), Muaraenim Formation, Muara Lakitan
DELINEASI CEKUNGAN BUSUR MUKA SIMEULUE BERDASARKAN DATA ANOMALI GAYA BERAT Lauty Dwita Santi; Imam Setiadi; Hermes Panggabean
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 3 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i3.169

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
STRATIGRAFI DAN SEDIMENTOLOGI ENDAPAN DATARAN PASANG-SURUT DI KALI TULIS, BANJARNEGARA Syaiful Bachri; Edi Slameto; Indra Nurdiana
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 3 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i3.170

Abstract

The tidal flat deposits of the Merawu Formation in Kali Tulis belongs to the Merawu Formation, and can be divided into two members, i.e. the lower part or the mudstone member, and the upper part or the sandstone member, with gradational contact between the two members. The lower parts is dominated by mudstone which is mostly deposited in mud flat environment, while the upper part is dominated by sandstone which is dominantly deposited in sand flat environment. Some sandstone layers in the lower part contains foraminifers of Early – Middle Miocene age, whereas the occurrence of fossils in the upper part has not been known so far. Sedimentary structures found in the two members include herring-bone structure, small scaled slump, parallel and cross laminations, bioturbation, flute cast, bed load, and fining upwards grain size. The sandstone of the two members contains volcanic rock fragments abundantly, suggesting that the provenance is volcanic rock in volcanic arc.Keywords: sand flat, mud flat, herring bone structure, Merawu Formation
LINGKUNGAN PENGENDAPAN BATUBARA, FORMASI KALUMPANG DI DAERAH MAMUJU Moh Heri Hermiyanto; Sahril Andi Mangga; Koesnama Koesnama
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 4 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i4.171

Abstract

Kalumpang (Toraja) Formation comprises syn-rifting sediments of Middle Eocene – Late Eocene age. This formation consists of quartz sandstone, conglomerate, shale, claystone with alternations of coal and limestone. Geochemical analysis shows that the caloric value ranges from 2480 kal/gr to 7440 kal/gr, moisture varies from 1,3%-6,7%, volatile matter 14,7%-44,9%, total sulphur 0,82%-7,70%, and the specific gravity ranges from 1,33 to 2,17. Based on the organic petrography analysis, the coal contains vitrinite 91,6 – 100%, liptinite or exinite 0,1 – 8,2 %,and inertinite 0,1 – 1 %. Maximum reflectance vitrinite (Rv-max) is ranging from 0,32%-0,62%, Ro 47%. The dominant maceral group is vitrinite, with rare liptinite. The high content of vitrinite suggests that the coal in Kalumpang is derived from plants in humic condition which were deposited in wet forest swamp. Meanwhile, the low content of inertinite indicates that oxidation processes did not take place intensely.Keywords : Kalumpang Formation, coal, eocene, organic petrology, maceral
KANDUNGAN MATERIAL ORGANIK DAN SIFAT GEOKIMIA BATULEMPUNG PALEOGEN DAN NEOGEN DI CEKUNGAN SERAYU: Suatu Analisis Potensi Batuan Induk Hidrokarbon Edi Slameto; Hermes Panggabean; Syaiful Bachri
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 4 (2010): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i4.172

Abstract

Geochemistry analysis (Rock-Eval pyrolisis, GC and GC-MS) on 2 (two) samples of Paleogene claystone, 3 (three) samples Neogene claystone, and 1 (one) oil seepage sample in Serayu Basin. The result of analysis shows that TOC of the Neogene claystone is higher than the Paleogene claystone. One sample of the Neogene claystone is able to be classified as source rock for oil and gas, whilst the others including the Paleogene claystone show as gas source rock. The geochemistry composition of Neogene claystone at Gintung River indicates that the oil seepage can be correlated with the rocks. The kerogen type of all claystone in the area ranges from Type III (terrestrial) to Type II (mixing terrestrial and marine).Keywords: hydrocarbon source rock, Rock-Eval pyrolisis, gas chromatography, gas chromatography-mass spectrometry, Serayu Basin
PENGARUH KEGIATAN TEKTONIK DAN GUNUNG API TERHADAP KARAKTERISTIK SEDIMENTOLOGI SEDIMEN NEOGEN AWAL DAERAH BAGIAN TENGAH CEKUNGAN SERAYU Syaiful Bachri
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 4 (2010): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i4.173

Abstract

The Early Neogene sediments in the central part of the Serayu Basin have different sedimentological characteristics of one unit from the others. They comprise the mean value of four variables, i.e. (1) sand/shale ratio, (2) bed frequency, (3) smectite / kaolinite ratio or Sm/(Sm+Ko), and (4) quartz/feldspar ratio or K/(K+F). The difference of the mean value of those four variables represents implication of different intensities of tectonic and volcanism activities. The variable values suggest that there was increasing tectonic activity followed by increasing volcanic activity from older rock unit to younger unit.Keywords: sedimentological characteristics, tectonic activity, volcanic activity, Serayu Basin
POLA ANOMALI MAGNET RESIDUAL DARI APLIKASI METODE TREND SURFACE ANALYSIS (TSA), HUBUNGANNYA DENGAN TATAAN GEOLOGI BAWAH DASAR LAUT DALAM PEMETAAN GEOLOGI KELAUTAN BERSISTEM DI PERAIRAN MANADO SULAWESI UTARA D. Ilhaude; B. Nirwana
Jurnal Geologi dan Sumberdaya Mineral Vol. 20 No. 4 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v20i4.174

Abstract

Analysis of magnetic intensity using a TSA method shows a significant value of residual anomaly from the separation of total magnetic anomaly value. Contour of the residual anomaly resulted from the 2nd order value of regional anomaly is assumed to be correlated with the geological structures of southwest-northeast directions.Keyword: TSA method, residual anomaly

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