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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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PENAFSIRAN REKAMAN SEISMIK PANTUL DANGKAL SALURAN TUNGGAL DI PERAIRAN KABAENA, MUNA DAN BUTON, SULAWESI TENGGARA I Nyoman Astawa; P. Astjario; I. K.G. Aryawan
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 1 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i1.277

Abstract

East Sulawesi terrane, generally called East Sulawesi Ofiolite, consists of ultramafic rock underlying pelagic sediment as a top layer. The rock is interpreted as a basement rock in  the East Sulawesi  Terrane which was formed during early Cretaceous. This ultramafic rock tectonically contacted with Mesozoicum and Paleogen ones, and unconformably overlied by molasses sediment type on the top.A number of single channel seismic profiling has been carried out and passing through between Kabaena, Muna and Buton islands.  Based on outcropping  and distribution  of rock units on those three islands, the seismic lines were made to get a clear geological  setting under the seafloor. Differentiation  of internal configuration  reflector of the seismic  records which  Interrelated  to rock unit on the islands have been interpreted very clearly. The study of seismic single channel records will be more accurate if it is correlated to the offshore drilling data in order to make an estimation of internal configuration reflectors to be definitely  correct. Keywords:  terrane, tectonic, seismic, interpretation, Buton
PETROLOGI DAN GEOKIMIA BATUAN GUNUNG API METULANGDI DAERAH LONGBIA, KALIMANTANTIMUR: IMPLIKASI TEKTONIKANYA Baharuddin Baharuddin
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 1 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i1.278

Abstract

Volcanic rocks which crop out at Long Bia area, east Kalimantan, consist of basaltic andesite to rhyolite in composition. They are in the form of lava, dykes, and pyroclastics. Stratigraphically, the  rocks belong the Tertiary Quaternary Metulang Volcanics. Petrographically, the rocks have porphyritic texture with plagioclase, feldspar, and pyroxene phenocrysts that are embedded within a groundmass.  Geochemical characteristic of major elements compose of  SiO2 (52,8 - 62,5 wt.%), TiO2 (0,57- 0,75wt.%), Al2O2  (15.4- 8,6 wt.%), CaO (5,4-9,4 wt. %) dan MgO (3,21-7,89 wt.%) with  depletion on trace elements (Nb, Zr, and Y). In contrast, light rare earth elements (La, Ce, and Nd) and large ion lithophile elements (Ba, Rb. K, and Sr) exhibit enrichment. Characteristics of petrology and geochemistry of the Metulang Long Bia Volcanics indicate that they were formed In an island arc environment and it is interpreted to be related to the Borneo-Palawan subduction activity during the  Tertiary-Quaternary time. Keywords : Petrology, geochemistry, Metulang Long Bia, tectonics
MIKROZONASI DAERAH KENDARI DAN SEKITARNYA BERDASARKAN RESPONS TANAH SETEMPAT Marjiyono Marjiyono; Asdani Soehaimi; J. H. Setiawan
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 1 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i1.279

Abstract

As one of the provincial capital city which is growing  fast, database of earth sciences is absolutely required In order to develop the secure of Kendari town. Measurement   of microtremor   in this region aims  to know the site response forward ground shacking. The result of microtremor analysis indicates that the distribution of dominant period of H/V ratio of Kendari and its surrounding area is parallel to Kendari bay, and turning south to follow the pattern of Wanggu river. Susceptibility  level in this area which  is represented by dominant period values is divided  into four categories (> 1.5 seconds, 1.5  -1.0 seconds, 1.0- 0.5 seconds, and <0.5 second). Generally, the pronest area coinciding with recent sedimentation  area, is around  Kendari  Bay and along Wanggu river, while towards outside are it is safer. Keyword:microtremor, ground shacking, Kendari
PENELITIAN LAPISAN AIR TANAH DENGAN METOD GEOLOGI PERMUKAAN, GAYA BERAT DAN GEOLISTRIK DI CEKUNGAN BANDUNG TIMUR Saultan Panjaitan
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 2 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i2.280

Abstract

Bouguer anomaly of 20 to 44 mgal are interpreted as igneous rocks and volcanic sediments. On the other hand, low Bouguer anomaly of 8 mgal to 20 mgal reflect the Bandung Basin. The Bandung Basin can be divided into two smaller basins, they are the Western Bandung Basin and the Eastern Bandung Basin. The Eastern Bandung Basin is marked by Bouguer anomaly of 10 mgal. The two smaller basins are separated by a high Bouguer anomaly of 30 mgal trending from south of Mount Malabar to the north of Ujungberung subdistrict. The thickness of Quaternary layers in the Eastern Bandung Basin at gravity profile is between 400 - 1000 m. This interpretation is supported by the resistivity value of ? around 551 ohm. Groundwater layers can be groupped into two parts: the shallow and deep groundwater. Shallow groundwater is found at the depth of 13 - 35 m with ? 8 - 13.2 ohm metres. Deep groundwater is located at depth of 70 m with ? 2.8 - 8.5 ohm metres. The shallow and deep groundwater layers are separated one from the other by impermeable rocks with ? value varies up to 551 ohm metres.
ANOMALI GAYA BERAT, KEGEMPAAN SERTA KELURUSAN STRUKTUR GEOLOGI DAERAH JOGJAKARTA DAN SEKITARNYA Bambang S.Widijono; Budi Setyanta
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 2 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i2.281

Abstract

The region of Jogjakarta and the surrounding area which are generaly covered by young sediment, consist of aluvium and volcanic deposits. Because of this phenomenon, lateral and vertical distribution of geological structural element are still unknown. Therefore, gravity data analysis is a good tool to delineate geological structural element burried by young sedimentdeposits. Regional and local geological structural lineaments which are detected by Bouguer and residual gravity anomaly analyses, inform that deformation processes have occurred intensively in this area. The occurrences of east-west trending fold and northeast-southwest trending thrust fault, northwest-southeast trending strikeslip fault, and north-south trending normal fault indicate that deformation process was caused by north-south compressional principal stress generated by subduction Eurasian plate and Indo-Australian plate. Gravity modelling analysis of AB and CD sections indicate the presence of strike slip fault, thrust fault and normal fault within the basement and Tertiary rocks. Several faults, such as Bogowonto, Nanggulan, Sentolo, Imogiri and Opak Faults, are interpreted to be reactivated and faulted the Quarternary deposits. Earthquake hazard that took place in Jogjakarta and th surrounding area on May 27 , 2006 by the reactivation of Opak Fault. Referring to this experience, the study of active faults in this area is necessary. Keywords : anomaly, gravity, geological structure, earthquake
MORFOGENESIS DAERAH DANAU KALDERA MANINJAU, SUMATERA BARAT Santoso Santoso; Ungkap M.Lumbanbatu
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 2 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i2.282

Abstract

Geomorphologically, the investigated area can be classified into several morphologic origins, i.e: volcanic, fluvio-volcanic, volcanic denudated, denudational, structural-volcanic and fluvial. Moreover, on the basis of the aerial photo interpretation and ground checking, two volcanic cones can be recognized, i.e., old and young Maninjau volcanoes. This assumption supported by the bathymetry map of the Maninjau Lake that shows two points of maximum depth at different locations, -168 m in the north and -169 m in the south sides respectively. These data indicate that the volcano has two different eruption centres. Keywords: geomorphology, fluvio-volcanic, denudational, structural
INDIKASI STRUKTUR SESAR DAN LIPATAN BAWAH PERMUKAAN DASAR LAUT PERAIRAN TUBAN, JAWA TIMUR Prijantono Astjario
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 2 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i2.283

Abstract

The marine geological and geophysical researches using a single channel seismic method in surrounding Turban water have been supported by echo sounder and marine sediment sampling activities. The single channel seismic record of 300 2 km has been made and it covers the area of about 1500 km . Those seismic profiling is perpendicular to the north coast of East Java with north - south direction and the cross line with east - west direction. The records are supposed to have a clear geological structure. Correlation of the geological structure based on the interpretation of seismic profiling of the sequence IV showed a similar east - west direction with the geological sequences of Rembang Basin. The sequence of sedimentary rocks of the Rembang Basin has been folded and faulted continuously from the land to the sea floor of the Java Sea. Keywords : seismic, echo sounder, geological structure, sequence, Rembang
ANNELID TEREBELLINA MACKAYI (BATHER) FROM MIDDLE TRIASSIC KESKAIN FORMATION, MISOOL ARCHIPELAGO, WEST IRIAN JAYA Fauzie Hasibuan
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 2 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i2.284

Abstract

Terebellina mackayi is an annelid fossil species which forms a tubular agglutinated body. It is a Middle Triassic taxon which has a common distribution in the world and has been recorded from Sumatera, Thailand, Misool, Timor, and New Zealand. A collection of small sized specimens of the species from the Keskain Formation (Misool) of Anisian to Ladinian age is here redescribed and a global correlation is attempted. Terebellina mackayi is commonly found in a random orientation of distribution within beds. The organism which is constructed of tubular shape remains enigmatic but was probably suspension feeder rather than browser, deposit feeder or active predator. Terebellina mackayi lived in a fine grained black silt substrate (infauna) rich in organic detritus. Keywords: Keskain Formation, Annelid, Terebellina mackayi, Anisian, Ladinian
PENELITIAN BIOSTRATIGRAFI MESOZOIKUM PULAU ROTE, NUSA TENGGARA TIMUR Fauzie Hasibuan
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 3 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i3.285

Abstract

A biostratigraphic study in Rote Island has proven that the distribution of Mesozoic rocks (especially Triassic, Jurassic,and Cretaceous) are broader than was thought by previous workers. The Paleozoic rocks are not exposed, but somefossils collected from the surface suggest that such rocks are present deep down in the earth subsurface of this island.The fossils were brought to the surface along with other materials by mud volcanoes which are common on the island.Mesozoic biostratigraphy of the Rote Island begins with Triassic, followed by Jurassic up to Cretaceous which areindicated by the presence of its fossils. Timorites sp., an ammonite genus indicating Permian (Paleozoic), yet theformation from which it originated is not known.In Mesozoic time, some species of Halobia lived indicating a Carnian to Early Norian age as shown by the presence of H.(H.) austriaca, H. (H.) styriaca, and H. (H.) charlyana in the Aitutu Formation. The presence of Monotis (M.) salinariashows that the Aitutu Formation is up to Late Norian in age. Fossil association is found in the Wailuli Formation,consisting amongst others of Ostrea sp., Perisphinctes timorense, Belemnopsis moluccana, B. galoi, B. stolleyi,Orbyrhynchia sp. and Irianites sp. Irianites sp. which indicates Bathonian is also found in the coeval formation in SulaIslands. Perisphinctes is generally found in Late Oxfordian. Belemnopsis moluccana has an age range from EarlyOxfordian to Early Tithonian, B. galoi from Kimmeridgian to Late Tithonian, and B. Stolleyi from Early Tithonian toBerriasian.The Nakfunu Formation exposed in Termanu area has a Cretaceous age in Rote Island. The formation is rich in radiolariasuch as Dictyomitra sp. which indicates Albian (Early Cretaceous). Trace fossils such as a large paramoudra are alsofound. Samples of radiolaria-bearing rocks were also collected, but the materials have not been studied due to lack ofthe expertise in the Geological Survey Institute. Keywords: Biostratigraphy, Paleozoic, Mesozoic, Aitutu Formation, Wailuli Formation, Nakfunu Formation, Halobia, Monotis, belemnites, ammonites
SEDIMENTASI SEBAGAI DILEMA PENGEMBANGAN PELABUHAN NUSANTARA DI PERAIRAN LASEM JAWA TENGAH Delyuzar Ilhaude; Ediar Usman
Jurnal Geologi dan Sumberdaya Mineral Vol. 17 No. 3 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v17i3.286

Abstract

The studied area is geographically located on the northern coast of Jawa, which is an open beach influenced by wave action from the northwest and northeast direction. The erosion process occurs relatively in the northeastern coastline of the Lasem area. Sediment supply from the northeastern of Lasem tends to be deposited in the central and the southwestern part of the studied area. The thickness of sediment of subsequence B4 on line L-1 in the southwestern part of the studied area is thicker compared with subsequense B4 on the line L-17 of the northeastern part of the studied area. The eastern part of Lasem can be developed as a harbor area. Keywords : bearing capacity, sediment supply

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