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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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MIKROFASIES DAN DIAGENESIS BATUGAMPING BERDASARKAN DATA PETROGRAFI PADA FORMASI NAKFUNU DI DAERAH TIMOR TENGAH SELATAN Sigit Maryanto; Asep Kurnia Permana
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 3 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i3.87

Abstract

Microfacies and diagenesis of limestones from the Nakfunu Formation have been studied to tracing the depositional mechanism and post depositional geological histories of the rocks. Limestone samples randomly taken from the field on the Cretaceous rock formation, for petrographic analysis. Petrogrtaphic analysis of the fourty two limestone samples showing that the type of the limestones are packstone, wackestone, and mudstone. The depositional environments of this formation are include basin margin, open sea shelf near the lower slope, and deep sea basin with slow sedimentation. The limestones have affected by various kinds of diagenetic proccesses post-sedimentation. The diagenetic procceses recorded under the polarization microscope as: cementation, replacement, silicification, recrystallization, dolomitization, compaction, fracturing, and dissolution.Keywords: Cretaceous, limestone, petrography, microfacies, diagenesis.
HUBUNGAN LEMBAH SADENG, CEKUNGAN BATURETNO DAN TERAS BENGAWAN SOLO,JAWA BAGIAN TENGAH Surono Martosuwito; Hanang Samodra; Sidarto Sidarto
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 3 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i3.88

Abstract

Sadeng valley or ancient river of Sadeng had head water at surrounding Giriwoyo, Wonogiri. Baturetno basin spread outs widely at the south of Wonogiri. When the Old Lawu Mountain erupted, the volcanic products flowed and blocked the Solo River caused big flooding that covered the Baturetno basin. At any time the river might cut the volcanic block, big flooding happed in the valley of the Solo River. As the result, floras and faunas which lived in the valley were got dead. In the next flooding their skeleton were transported and deposited at the Solo terrace. Such things were happened many times. Animal fossils and homonids could possibly much more abundance in the older terraces rather than in the younger one.Key words: Sadeng Valley, Beturetno Basin, Bengawan Solo Terraces, relationship
MAGMATISME, SUMBERDAYA MINERAL DAN ENERGI DI TAPANULI SELATAN-SUMATERA UTARA Isnu Hajar Sulistyawan; Bhakti Hamonangan Harahap
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 3 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i3.89

Abstract

The result of geological survey in Tapanuli Selatan indicates that there are a relationship between magmatism process and the possibility of mineral and energy occurences. Field observation and supported with laboratory analysis showing some mineral occurs in the area i.e. gold, base metal (Cu, Pb, Zn), zeolit, kaolin, andesitic lava dan tras. Multiple intrusions may control the occurrence of base metals and gold resources and the eruption of some volcanoes was producing another mineral resources. Resources of geothermal also found in Sipirok as another implication of volcanic process in Tapanuli Selatan area. It may related to the activity of Mount Sibualbuali in the past. Occurs as the effect of heat release from the magmatism process, hydrocarbon of Barumun Basin and some layers of coal has found in this area. High calori of coal was occurs in a thin layer of Sihapas Formation.Keywords : magmatism, resources, minerals, hydrocarbon, geothermal
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i2.90

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
SINYAL GEOMAGNETIK DI CEKUNGAN SENGKANG IMPLIKASI TERHADAP POLA STRUKTUR DAN KONFIGURASI BATUAN ALAS CEKUNGAN Budi Setyanta; Subagio Subagio
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 2 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i2.91

Abstract

The intensity of magnetic anomalies at Sengkang Basin varies from -750 nTto 400 nT. Basin configuration and subsurface geological structues can be analysed by modelling of the magnetic signal of ultramafic basement. Geomagnetic analisis indicates that the Sengkang Basin is underlain by high magnetic ultrabasic rocks, and the geological structures consit of a NE-SW fold, crossedcut by a NW-SE fault. Keywords: Geomagnetic signals, Sengkang basin, ultramafic basement configuration, geological structures.
PERBEDAAN GENESA MAGMA ANTARA TIN BEARING GRANITOID ROCKS DARI JALUR KEPULAUAN TIMAH INDONESIA DAN TIN BARREN GRANITOID ROCKS DARI PULAU BINTAN Mesker H.J Dirk
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 2 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i2.92

Abstract

There are differences between the granitoid rocks of the Menumbing- Bangka Island, Karimun Island, Kundur Island, with the granitoid rocks of the Bintan Island. The earlier are tin bearing granitoid rocks, while the later are tin barren granitoid rocks. The tin bearing granitoid rocks of Menumbing-Bangka Island, and Karimun and Kundur Islands, are strongly porphyritics, plagioclase as one of the primary rock forming minerals has composition of An0-20, the accessory minerals of ilmenite, zircon, apatite, secondary muscovite ± tourmaline ± flourite ± cassiterite ± monazite are found in the pegmatitic veins. The avarage content of SiO2 ≥ 70 wt%, CaO ≤ 2 wt%, and Na / (Na + K) ≤ 0.6. The tin bearing granitoid rocks are monzogranites, with calk-alkaline affinity, peraluminous, with increasing alkaline components to proportionally decreasing FeO* and MgO components. The age of the tin bearing granitoid rocks is around 211 ± 10 – 200 ± 4 my. or Upper Triassic, have formed from magma generated by melting of graywackce source material at a collision zone or convergence continental margins. The tin barren granitoid rocks of Bintan Island are weak porphyritic textures, plagioclase as one of the primary rock forming minerals has composition of An0-20, and hornblende as mafic mineral. The accessory minerals are magnetite, zircon, apatite, ± sphene. The avarage content of SiO2 ≥ 70 weight%, CaO ≤ 2 weight%, and Na / (Na + K) ≥ 0.6. The rocks are monzogranites and granodiorites, with calk-alkaline affinity, peraluminous, with increasing alkaline components to only decreasing FeO* component. The age of the tin barren granitoid rocks is around 230 ± 2 – 222 ± 3 my. or Middle Triassic – Upper Triassic, have formed at a subduction zone of magma generated from melting of mixed tholeiitic and equivalent graywacke source materials. In addition to those differences, both group of the granitoid rocks also differ in its magnetic susceptibility i.e. the tin bearing granitoid rocks have magnetic susceptibility around (0.18 – 0.90) S.I. unit, and the tin barren granitoid rocks around (2.75 – 7.75) S.I. unit.Keywords: Magma genesis, tin bearing granitoid rocks, Menumbing-Bangka Island, Karimun Island, Kundur Island, Bintan Island.
LINGKUNGAN PENGENDAPAN FORMASI PEMBAWA BATUABARA WARUKIN DI DAERAH KANDANGAN DAN SEKITARNYA, KALIMANTAN SELATAN R Heryanto; H Panggabean
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 2 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i2.93

Abstract

Kandangan area belongs to the South Hulusungai the District, South Kalimantan Province. The Warukin Formation in this area is situated in the eastern margin of the Barito Basin. In this area, the basin is underlain by Pre-Tertiary rocks comprising an assortment of rocks of continental and oceanic crusts. The Barito Basin was filled by sedimentary rocks of the Tanjung, Berai, and Warukin Formations having an age of ranging from Eocene to Miocene which was then unconformably succeeded by the Plio-Pleistocene Dahor Formation. The Warukin Formation consists of grey- to blackish color of claystone, intercalated by sandstone and coal seams. The thickness of coal ranges from 0.5 to 12 meters. The coal is black, dull to dull banded, light, contains abundant of resins and showing a woody structure. The Warukin coal seam composed by macerals of vitrinite (59.4-86.6%), exinite or liptinite (0.8-9.5%), and inertinte (3.4-17.4%). Based on a triangle diagram of TFD facies shows that coal samples of the Warukin Formation categorized into a wet forest swamp or telmatic facies. Furthermore, the plotting Gelification Index (GI) versus Tissue Preservation Index (TPI) the coal seams of the Warukin Formation was deposited in the transgressive phase, at limnic facies, to lower delta plain facies.Keywords : coal, maceral, Warukin Formation, Kandangan, Barito Basin
SEDIMENTOLOGI BATUGAMPING FORMASI JONGGRANGAN DI SEPANJANG LINTASAN GUA KISKENDO, GIRIMULYO, KULONPROGO Sigit Maryanto
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 2 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i2.94

Abstract

The Early Miocene limstone of the Jonggrangan Formation is cropped out at Gua Kiskendo Section, Kulonprogo Regency. Detailed stratigraphic sections were measured out along twelve kilometers section to predict the development of their depositional environments. Limestone petrography analysis are useful to sharpening the limestone microfacies interpretations. Based on petrography data from thirty eight samples, this limestone formation composes of boundstone, floatstone, grainstone, packstone, wackestone, mudstone, and crystalline limestone. The depositional environments of this formation are regressive condition, include fore-reef facies, organic reef facies, reef flank facies, shelf lagoon with open circulation facies, and shallow marine until local basin on back reef with open circulation facies.Keywords: Miocene, petrography, sedimentology, limestone, reef.
ACUAN STANDAR INTERNAL GEOKIMIA DENGAN MATRIKS STREAM SEDIMENTS WILAYAH SOREANG, JAWA BARAT R Irzon; Kurnia Kurnia
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 1 (2013): Jurnal Sumber Daya Geologi
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Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i1.95

Abstract

Certified reference materials are needed in producing a good validity level of measurement process. The closer analytical result of CRM to its certificated value, the better quality of measurement would be. This studi was aimed to produce internal reference material in three kinds of stream sediment matrixes: the first is considered as natural stream sediment, the second suggest to be affected by industrial and anthropogenic actifity, and the last one was taken near by conventional gold mining location. All about sampling location, geological setting and megascopic description of the samples had been collected and saved properly. The three stream sediments samples were homogenized manually and separated in to some split bottles and were prepared and analyzed chemically to show their homogeneity. An Atomic Absorbance Spectrometry and X-Ray Floresence are used to analyze the samples for tatally nine times. Measurement results show that these in-house reference materials are in good level of homogeneity and many chemical elements can be used as a reference value with coefficient of variance <5%. Several factors influence the type of sediment are also reflected in the value of the elements content of each sample, where each example shows the content of the element in accordance with the factors that affect the flow of sediment respectively. This study could be continued further to produce a national reference material in stream sediments matrix.Key words: : in–house reference material, stream sediments, AAS, XRF
LANDSLIDE HAZARD ASSESMENT ON JAVA ISLAND Case Study: Landslides In Warungkiara, Bogor, Majalengka, Banjarnegara And Jember Edi Prasetyo Utomo
Jurnal Geologi dan Sumberdaya Mineral Vol. 23 No. 1 (2013): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v23i1.96

Abstract

All of landslides recorded in Indonesia between 2003 – 2006, 90% of the events occurred on Java Island, Indonesia. Due to lack of long term statistical data, their characteristics are not well known. Based on the analysis of climate, geology, topography and landslide statistical data, the landslide characteristics on Java Island can be ascertained. It can be concluded that the frequency of occurrences of landslides are highest in the southern part of the West Java Province, followed by the Central Java Province and the East Java Province.Landslides on Java island can be classified based on their triggering factors, which comprise: rainfall, morphology, earthquakes, lithology, and the occurrence of active faults. As far as types of landslides are concerned, rockslides and toppling are rather rare, while most landslides are of the sliding (translation, rotation, block failure), creeping and debris flow types. The materials involved in landslides comprise weathered volcanic breccia, sedimentary material mixed with clay, mudstone, sandstone, limestone, marl and pyroclastic (deposits of volcanic ash and tuffaceous sand) and loam.Landslide events significantly occur in the rainy season, especially from December to April. Dead and missing victims by landslides increase when annual rainfall is in excess of 2100 mm. In this paper, with reference to the above mentioned factors and conditions, type of landslide prone areas and countermeasures will be discussed.Keywords: Landslide hazard, Java Island, classification, statistical data analysis.

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