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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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PERUBAHAN LINGKUNGAN PENGENDAPAN HUBUNGANNYA DENGAN TEKTONIK KUARTER (Studi Kasus Geologi Kuarter di Wilayah Dataran Rendah Aluvial Hingga Pantai Sepanjang Maron- Sikucingkrajan, Kec. Gemuruh, Kab. Kendal (Jawa Tengah) Soemantri Poedjoprajitno; Herman Moechtar; S. Hidayat
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 2 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i2.198

Abstract

Quaternary deposits of the alluvial plain to coastal plains in the Kec. Gemuruh, Kabupaten Kendal in the north-coast of Java (The Central Java Province) have been studied. The study was based on an analyses of geological surface and subsurface, especially of six boreholes information obtained along the North-South, and the penetration of the bore head varied from 2.80 to 6,65 m. These Quaternary deposits, can be devided into Members of Sandstone Damar Formation (Tpds), Damar Formation (Qtd), floodbasin and river channel deposits. Based on the correlation of the lateral and vertical variations of the deposition environment in the eastern part, the sediment accumulations were recognised which are related to fault activities. Whereas, the sediment accumulations in the western part influenced by normal fault. The tectonic activities which controlled the deposition processes were recorded as two stages. These were, (1)the activity of uplift fault obtained along the West to East, (2)the activity of uplift with direction West to East in the northern part followed by activity of normal fault towards almost North-South. Relative sea-level changes affect coastal-plain environment, they are influenced by local tectonic and global of sea-level changes. The tectonic activity also would cause shallowing and steepening of the depositional slope. Keywords : Quaternary sediments, tectonic, structure geology, sediment accumulation
PENARIKHAN RADIOKARBON DALAM PENENTUAN AKTIVITAS TEKTONIK KUARTER DI SEPANJANG ALIRAN SUNGAI OPAK DAN PANTAI SAMAS, YOGYAKARTA Darwin A Siregar; Asdani Soehaimi
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 2 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i2.199

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
STRUKTUR GEOLOGI BAWAH PERMUKAAN DAERAH PEKALONGAN DAN SEKITARNYA BERDASARKAN ANALISIS ANOMALI GAYA BERAT DAN MAGNET D A Nainggolan
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 2 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i2.200

Abstract

The result of gravity measurement in the studied area, which is mainly covered by volcanic rocks, has an anomaly value ranging from -11 to 45 mgal. Quantitative interpretation of Bouguer anomaly and magnet shows a subsurface profile depicting the geological processes and tectonic activities. The qualitative analysis results of residual and Bouguer anomalies indicate faults mainly have east - west and north - south directions. Meanwhile, the quantitative analyses of three subsurface model profiles show the graben structure in the Subah area to the south east of Batang city.  Keywords : gravity, magnet, faults, graben, structural geology, Pekalongan area
POTENTIAL EARTHQUAKE HAZARD MICROZONATIONS OF THE JAKARTA CITY Asdani Soehaimi
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 2 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i2.201

Abstract

Jakarta, the capital city of the Republic of Indonesia, is a potential earthquake hazard area. The city lies on the very thick ( >294 M ) Quaternary sediments. Destructive earthquakes influenced this city were generated from the subduction and active faults with the Maximum intensity of VI - VII MMI. A microtremor investigation to the shallow soft Quaternary sediment results in the dominant period of 0.05 – 0.85. The classification of this dominant period is the basic classification of rock and soil site and as an important factor of the earthquake hazard susceptibility in a region. Dynamic site responses, which are presented by the multiply of amplification factors and natural dominant periods of this city are divided into five microzonations, these are :–         Very high susceptibility microzonation (index's > 10), covers the area of 7.58 km2  or 1.15 % of the total region of Jakarta occupies a small area of North Jakarta.–         High susceptibility microzonation (index's 7.5 – 10 ), covers the area of 18 km2 or 2.73% of the total region of Jakarta consisting of small area of North Jakarta city (Kapuk resort), Central Jakarta including the area of Setiabudi.–         Moderately susceptibility microzonation (index's 5-7.5), covers the areas of 86.59 km2 or 13.11 % of the total region of Jakarta, including the North, Central, East and South Jakarta and the small area of West Jakarta .–         Low susceptibility microzonation (index's 2.5 - 5), covers the area of 324 km2 or 49.18 % of the total region of Jakarta, and it occupies the western part of North Jakarta, eastern part of west Jakarta and the central part of central Jakarta.–         Very low susceptibility microzonation (index's < 2.5 ), covers the area of 223.47 km2 or 33.83 % of th total region of Jakarta , the area includes a small part of the central Jakarta and the eastern part of west Jakarta.These earthquake hazard microzonations are one of important data base for regional planning in order to mitigate earthquake hazards and risks of the Jakarta city. Keywords: Earthquake hazard microzonation and regional planning 
PENGARUH TEKTONIK PADA RUNTUNAN ENDAPAN ALUVIAL DEPRESI PADANGSIDEMPUAN, SUMATERA UTARA Ungkap M Lumbanbatu; C Basri; S. Hidayat; Darwin A Siregar
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 3 (2009): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i3.202

Abstract

The investigated area, that is so called Padangsidempuan depression has been filled up by unconsolidated fluvial sediments. The sediments can be distinguished into five different environments, these are flood basin deposit, flood plain deposit, palaeo channel deposit, swamp deposit and colluvium deposit. To understand the influence of tectonic activities on lithological succession of the studied area several profiles were made. It reveals, that lithological successions have been disturbed by tectonic activities such as subsidence and uplifted. Subsidence can be identified by alternating of swamp facies deposit within different stratigraphic position and superimposed of the Batang Toru river on the palaeo channel deposit three (Ch-3). Further more the effect of uplifting caused palaeo channel deposit shifting horizontally. The data show that the tectonic activities in the studied area are not so very intensive. Keywords: quarternary tectonics, palaeo channels, pull-apart basin, sedimentary sequences
CRETACEOUS OROGENIC GRANITE BELTS, KALIMANTAN, INDONESIA Amiruddin Amiruddin
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 3 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i3.203

Abstract

Two types of Cretaceous Orogenic Granite-Belts are able to be recognized in Kalimantan, which tend to show characteristics of Cordilleran and Caledonian Granite-Types. The Cordilleran Granite-Type consists of huge granitoid batholiths known as the Schwaner, Ketapang and Singkawang batholiths. This granite type comprises tonalite and granodiorite, and minor granite sensu stricto, predominantly owning calc-alkaline to slightly alkaline composition. The granitioids are also metaluminous and slightly peraluminous which probably due to the assimilation of magma stopping. Genetically, the granite is an I-type which was formed during a subduction of oceanic crust material beneath a continental margin. Those plutons were emplaced during a longer period, ranging from 86 to 129 m.a or from Early to Late Cretaceous. The Caledonian Granite-Type comprises isolated smaller plutons of Pueh Granite, Manyukung Granite, Era Granite, Topai Granite, Nyaan Granite, Alan Granite, Kelai Granite and Sangkulirang Granite. This granite type consists of granite sensu stricto and granodiorite, having calc-alkaline and alkaline and also metaluminous and peraluminous compositions. They belong to I-type and S-type granites, suggesting that in the area, different magma sources had been generated. The Itype granite was derived from partial melting of igneous rock whereas the S-type one was derived from anatexis of sedimentary rocks of continental crust. These plutons were emplaced within a relatively short time, ranging from 74.9 to 80.6 m.a or Late Cretaceous. Keywords: Cretaceous Orogenic Belts, Cordilleran and Caledonian Granite types.
MEDAN GAYA BERAT PADA BATUAN OFIOLIT (ULTRAMAFIK) DI BEOGA, PAPUA DAN IMPLIKASI TERHADAP GENESIS ALIH TEMPATNYA Budi Setyanta; Bambang Suci Widijono
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 3 (2009): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i3.204

Abstract

In Beoga, Puncak Jaya, Papua, a group of ultramafic rocks consisting of piroxenite, dunite, serpentenite and peridotite are exposed. The distribution of these rocks are very large, lying alongside east - west direction, reaching 50 km and 100 km long. The gravity fields in this region exhibit an elliptic gravity anomaly pattern ranging from -25 to 160 mGals. The gravity modelling and geological analysis suggest that ophiolite has been fragmented and exposed due to obduction, caused by an interaction between Pacific oceanic and Australian granitic plates. This tectonic setting may cause Mulia and its surrounding area to be susceptible to geological hazards such as earthquake and landslides. Keywords : gravity potentials, ophiolite, genesis, geology potential
STRATIGRAFI DAN BIOTA JURA KEPULAUAN MISOOL, INDONESIA DAN KORELASI INTERREGIONAL DAN GLOBALNYA Fauzie Hasibuan
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 3 (2009): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i3.205

Abstract

The Jurassic fauna of Misool Archipelago is very similar to Sula Islands on the basis of bivalve content, but it differs from Sula Islands in that good ammonite assemblages which replaced by assemblages of belemnites. The fauna of Misool Archipelago can also be correlated with Papua is on the basis of ammonite fauna such as Fontannesia killiani. Misool Archipelago fauna is also correlable with those of the European Alps, North America, Chile, Argentina, New Zealand, Northwestern Australia, North and South Tibet, Himalaya, etc. However, some areas correlation is based only on a few species and sometimes only on cosmopolitan genera. Keywords: Jurassic, Misool Archipelago, ammonites, bivalve, interregional and global correlation 
LITOSTRATIGRAFI PEGUNUNGAN SELATAN BAGIAN TIMUR DAERAH ISTIMEWA YOGYAKARTA DAN JAWA TENGAH Surono Surono
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 3 (2009): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i3.206

Abstract

the central part of the Southern Montains, which extends east-west from Parangtritis (Yogyakarta) to Baturetno Plain (Wonogiri, Central Jawa), is typically formed by clastic and carbonate sediments with volcanic rocks. Volcanic activities had been very intensive during Late Oligocene - Early Miocene. Based on their lithologies, the Southern Montains can be divided into: pra-volcanic, volcanic and postvolcanic (carbonate) periods. The rocks formed during pre-volcanic period are as the basement of the rocks which were formed during the volcanic period. Results geological mapping/study in this Southern Montains are pesented in this paper, e.g. similar formations can be divided into smaller lithologic unit, therefore the formations can be proposed into groups. Key words: Southern Montains, lithostragraphy, volcanism period, basement rocks
PERKEMBANGAN DATARAN PANTAI (COASTAL PLAIN) DAERAH KENDAL PROVINSI JAWA TENGAH Ungkap M.Lumbanbatu
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 4 (2009): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i4.208

Abstract

A coastal plain area having dynamic charakterisitc. Understanding of Quaternary stratigraphy plays an important role in explaining the occurance of geological processes during the development of the coastal plain. Holocene stratigraphic sequence analysis reveals that the studied area has been influenced by several geological processes such as sea level rise and drop, and tectonic activities. These geological phenomenas are expected as the agents to change the directions of coastal plain development. Keywords: tectonics, quaternary stratigraphic sequences, sea level rise, sea level drop 

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