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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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SEDIMENTOLOGI DAN AKUMULASI KASITERIT PADA ENDAPAN ALUVIUM SEPANJANG AIR INAS HINGGA LAUT LEPAS PANTAI TANJUNG KUBU (TOBOALI), BANGKA SELATAN Moechtar, Herman; Hidayat, S.
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 2 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Placer cassiterite deposits of Air Inas suggest that the deposits consist of mass flows of coarse grains (A1), mass flows of fine grains (A2), offshores (B.1), nearshores (B2), fluvial (B3), Recent deposits of nearshores (C1), and flood basin deposits (C2). The research was based on analizing sedimentology and stratigraphy of eleven boreholes available along North to South traverse. Depth of bore hole varied from 1.60 to 12.20 at elevation of + 25,00 to – 7,20 m of sea level. Based on a series of sedimentary environment correlation, alluvial deposits can be divided into three sedimentary intervals (A,B and C). Each interval is characterized by environmental changes controlled by transgression and regression as well as climatic changes. Referring to cassiterite genesis there are three phenomena namely chemical and physical weatherings, transgression effect and climate changesKeywords: placer deposits, sediment, stratigraphy
MENGURANGI AMBIGUITAS DALAM PEMODELAN BAWAH PERMUKAAN GAYA BERAT UNTUK GEOLOGIAWAN Setyanta, Budi
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 1 (2015): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Interpretasi anomali gayaberat memberikan hasil yang tidak unik yaitu untuk satu penampang anomali gayaberat dapat memberikan hasil yang bermacam-macam (sifat ambiguity). Seorang interpreter dapat mengurangi ambiguitas model bawah permukaan gayaberat secara sederhana dengan berbagai cara sesuai dengan ketersediaan data pendukung yang lain. Cara-cara tersebut diantaranya adalah dengan data bor atau data seismik, selain itu dapat juga dilakukan dengan menggabungkan data gayaberat dengan data geomagnet pada lintasan yang sama. Selain itu dapat juga dilakukan dengan membuat penampang koreksi rapatmassa batuan sehingga didapatkan nilai rapatmassa yang sesuai. Cara-cara tersebut terbukti dapat mengurangi ambiguitas dalam pemodelan bawah permukaan gayaberat bahkan untuk pekerjaan eksplorasi sekalipun. Namun demikian pemahaman tentang geologi dan tektonik daerah yang diteliti mutlak harus diketahui oleh interpreter.Kata kunci : Model gayaberat, ambiguitas, data pendukung lain, pemodelan
PENARIKHAN RADIOKARBON DALAM PENENTUAN AKTIVITAS TEKTONIK KUARTER DI SEPANJANG ALIRAN SUNGAI OPAK DAN PANTAI SAMAS, YOGYAKARTA Siregar, Darwin A; Soehaimi, Asdani
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 2 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The Samas beach ridges and river terraces of Opak, Progo, Oyo and Berbah in the research area were formed by the neotectonic activities since ± 7000 years ago until Recent. Materials for Radiocarbon dating consists of mollusc and organic clay found in the beach ridge and river terrace deposits. The oldest Samas beach sand is 1980 ± 120 years BP and Opak River terrace at Berbah is 6950 ± 300 years BP. Meanwhile, the Oyo River terrace at Siluk is 2640 ± 100 years BP and Opak River terrace at Karang is 1220 ± 120 years BP. The dynamic neotectonic activities of Samas beach are represented by the uplifting and shifting of the coast line, meanwhile at Berbah, Siluk and Karang are indicated by uplifting end shifting of the river base level. These dynamic activities were caused by the regional tectonic activity related to subduction in the south of Java island and the local tectonic activity along the Opak fault zone. Keywords : Dynamic of beach sand, river terrace, elevation and radio carbon dating
ANOMALI GAYABERAT DAN POTENSI BENCANA GEOLOGI DI KAWASAN JAWA BARAT BAGIAN TENGAH Subagio, Subagio
Jurnal Geologi dan Sumberdaya Mineral Vol 23, No 2 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

In the Central part of West Java, anomaly Bouguer values vary from 5 to 125 mGals, forming high and low anomalies. The lowest anomaly located around Tagogapu, Padalarang area showing a sediment basin; while the highest anomaly is located around Pelabuhanratu, that are controlled by the existence of ultramafic rocks. In the survey area the rocks are divided into three groups, involving Tertiary sedimentary rocks with density 2,4 gr/cm3; Quaternary volcanic rocks with density 2,2 gr/cm3; and andesite with density 2,8 gr/cm3. Based on the modellings, faults in this area consist of thrust, normal and strike slip faults, partly are active faults. In Puncak area and its surroundings are a graben zone, that filled by low density rocks consisting of Quaternary volcanic rocks, is controlled by sub-surface active faults. Therefore the areas potentialy undergo landslides.Key words: gravity anomaly, active faults,Puncak, graben zone, landslide
BENCANA GEOLOGI DAN EVALUASI PENGEMBANGAN INFRASTRUKTUR WILAYAH PESISI,R TELUK RAJEGWESI, BANYUWANGI Usman, E.
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 2 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Geologically, the area of Rajegwesi Bay is potential for geological hazard (earthquake and tsunami). The area of Rajegwesi Bay is located in the front of the Jawa Trench which has high risk in seismicity. In 1994, the south coast of Banyu.wangi was attacked by an earthquake and tsunami where the wave had reached more than 10m high. The huge damage happened on bays where many peoples lives including Rajegwesi Bay. The coastal characteristic mapping shows the coastal plain lies less than 4 m and it represents the area that has a high wave and longshore current. The settlement on Rajegwesi Bay is located in coastal plain area, and when a tsunami happens, it will be sweeped by waves. Based on seismicity aspects in this area, the intrsstructug: locations determined by the local government of Banyuwangi must be revised and removed to safe locations, i.e, the area which lies more than 10m above sea level. Keywords: earthquake, tsunami, settlement, Rajegwesi Bay
KERENTANAN EROSI DI DAERAH MANADO DAN SEKITARNYA, SULAWESI UTARA Hidayat, S.; Suharsono, Suharsono
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 6 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Evolution cycle of landform in Manado and surrounding area is  caused by  weathering, erosion, transportation, sedimentation, and human factors. These processes have occurred since the land existence, and theywere strongly accelerated   by human  activities.Based on slope level, soil/rock type, vegetation/land covers, and erosion type, the erosion susceptibility in the studied area can be grouped into: high, medium, low,  and no erosion.Very high erosion occurs  on landform  of volcanic cone a and  b, volcanic slope a and b, mountain  dissected volcanic slope and dissected straight  volcanic mountain. High erosion occurs on landform  of solfatara field, fumarola, volcanic foot slope b, volcanic mountain slope elongated  dissected, volcanic slope c, residual  hill and lava flow. Medium erosion occurs on landform of volcanic  foot slope a and alluvium  fan.  Lowerosion occurs on landform of volcanic  foot slope c, intermountain plane and flood plain. No erosion occurs on landform of alluvial.Keyword: erosion succeptibility, Manado, weathering, transportation, sedimentation
Karakteristik Jasper Merah di Pulau Jawa Bagian Selatan Berdasarkan Analisis SEM dan XRF Wijayanti, Kemala; Rosana, Mega Fatimah; Yuningsih, Euis Tintin; Sulistyawan, Raden Isnu Hajar
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 1 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Jasper is one type of microcrystalline silica which include to gemstone variety. Indonesia has a high potential of jasper because its variety and a huge number of jasper that widely spread in Indonesia. There are 3 (three) types of jaspers that usually found in Indonesia, red jasper, yellow jasper, and green jasper. Among three of them, red jasper is much more abundant especially in Southern Java.Therefore, this research was held to observe the differences of red jasper's characteristic in three places in Java, i.e., Bungbulang – Garut, Samigaluh – Yogyakarta, and Donorojo – Pacitan areas. To attain the purpose of this research, SEM analysis is used to compare their textures and XRF for the chemical compositions.The research concludes that the red jaspers from those three places have the same texture, the granulated texture which derived from quartz texture. The grain size seems to increased from west to east. From the chemical composition it can be seen that the red color of jasper is strongly affected by Fe, Cr, and V. The Ti elements of red jasper also increased from west to east because there is a high Ti content in Pacitan's red jasper and perhaps by the combination of those elements resulting the purple color in red jasper.Keywords - red jasper, gemstone, composition, element, Southern Java
PENYEBARAN BATUAN GRANIT DAN SEDIMEN KUARTER BERDASARKAN INTERPRETASI DATA SEISMIK DI PERAIRAN BATAM UTARA Usman, Ediar
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 1 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Results of mappings and publications concerning the distribution  of granite and Quaternary sediments in territorial waters of Batam Island and its surroundings are still limited.  It is caused by the distribution of the granite which emerges to sea bottom in territorial waters in the  part of the North  Batam  and its surroundings  is also limited.  Results of seismic interpretation show the existence of some reflector characteristics of the granite and the Quaternary sediments. Based on the interpretation model at bedrock and the Quaternary sediment, distribution area of the bedrock is in part of west and north of Batam Island and also in the part of the north of Bintan Island. While the Quaternary sediment, based on reflector seismic characters, is coarse fluvial deposits at the bottom as the channel fill between some domes of granite body and recent marine deposits at the top. If the bedrock is correlated with regional geology in territorial water of the Batam Island and its surroundings,the bedrock is granite. Keywords: granite, bedrock, Quatenary sedimen,seismic interpretation ,North Batam
Stratigraphy and Tectonic Development of Mentawai Islands, West Sumatera, Based on Plate Tectonic Theory Mangga, S Andi; Kusnama, Kusnama; Suyono, Suyono
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 3 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The Mentawai Islands are situated on the Indian Ocean westwards of West Sumatera Province forming a non-volcanic island arc. Stratigraphic and tectonic development of the islands are strongly related to the subduction between the Indian Ocean and Eurasian Continental Plate. Tectonic activities have occurred since Early Tertiary - Late Pliocene. It has happened simultaneously with the Indian Ocean Plates collision moving northwards and subducted below the Sunda/Eurasian Continental Plate. The Ophiolite and Melange Complexes were exposed and overlain unconformably by the acceleration prism of sedimentary rocks (Mentawai Group) formed as a pond sedimentation deposited within a small basin situated between active thrust fault fragments. Based on the age determination gained from paleontological analysis, tectonic configuration, basin development, and sedimentation rate, the Mentawai Islands are believed to be formed by mélange complexes comprising part of an uplifted accretionary complex of a non-volcanic island arc. Keywords: stratigraphy, tectonic, mélange, Mentawai Islands 
TECTONIC RIFTING OF UPPER PALEOZOIC – MESOZOIC INTRA-CRATONIC BASINS IN THE SOUTHEASTERN GONDWANALAND AND ITS ECONOMIC ASPECTS: with refference to the Geology of North Sumatra and West Australia Amiruddin, Amiruddin
Jurnal Geologi dan Sumberdaya Mineral Vol 21, No 5 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Lower Permian fluvio – marine glacial sediments of intracratonic basins of West Australia and these of North Sumatera, West Indonesia in addition paleomagnetic data indicate that the paleo position of all basins were probably in the Southeastern part of Gondwanaland. These are also evidence that during Permian, glaciation had been widespread occur in the part of the land. The occurence of ultrapotassic rocks comprising Permian – Triassic A-type granite (An orogenic-type granite) in north Sumatera terrain and feldspatoid bearing subvolcanics of the Canning Basin, West Australia suggests that a tectonic rifting happened during the time period in the part of that stable continental plate and give way for magmatic emplacemet from lower to upper crusts. Perhaps this rifting had also related to a convergent activity during that time in which proto Pacific Plate move westward and collided or subducted into the eastern part of proto Australia continent moving eastwards and eventually form a Permian-Triassic mobile belt along Eastern Australia known as Tasman mobile belt.Key word: tectonic rifting, intra-cratonic basin, Gondwanaland, Permian – Triassic, North Sumatra, West Australia.

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