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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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GEOLOGI GUNUNG SADAHURIP, KABUPATEN GARUT Asmoro, Pudjo
Jurnal Geologi dan Sumberdaya Mineral Vol 14, No 4 (2013): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Isu-isu adanya piramida Sadahurip telah merebak di media massa, elektronik dan dunia maya sejak awal tahun 2012. Kalangan masyarakat tertentu masih percaya, walaupun telah disanggah oleh beberapa ahli geologi dan arkeologi. Berdasarkan pandangan ilmu kegunungapian, G. Sadahurip merupakan gunung api tua yang merupakan parasit G. Talagabodas, dan muncul di dalam bukaan kawah berarah tenggara-baratlaut. G. Sadahurip berbentuk kerucut, dan disusun oleh aliran-aliran lava dan sebagian besar ditutupi oleh endapan jatuhan piroklastika berumur 13320 BP. Lembah Baturahong adalah lembah dalam yang terbentuk oleh proses erosi. Bercak-bercak warna putih pada permukaan bongkahan lava yang dianggap batu bertulis di Kp.Cicaparlebak merupakan endapan silika. Semua kenampakan tersebut menunjukkan bahwa G. Sadahurip bukan piramida hasil budaya manusia pra sejarah, tetapi sebuah gunung api tua, parasit G. Talagabodas yang terbentuk sebagai hasil erupsi efusif.Kata kunci : piramida, lembah baturahong, batu bertulis, gunung api tua, Sadahurip, Garut
SEDIMENTASI FORMASI SEMILIR DI DESA SENDANG, WURYANTORO, WONOGIRI, JAWA TENGAH Surono, Surono
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 1 (2008): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Semilir Formation crops out widely along the Southern Mountains, the southern part of Central Jawa. This formation plays an important role in both stratigraphy and magmatism of the area. The formation is conformably underlain by turbidite-dominated sediments of Kebo Butak Formation and the upper part is overlain by the volcanic breccia of Nglanggran Formation. On the basis of lithological variation, the Semilir Formation can be distinguished into four units: sandstone, lapilli tuff, pumice breccia and andesitic pumice breccia.  Calcareous clay within the sandstone unit contains nannofossils which indicate an Early Miocene age. On the other hand, fission track datings of zircon, which is contained in the pumice of the pumice breccia facies, have resulted in the ages of 17.0 + 0 Ma and 16.0 + 1.0 Ma or latest Early Miocene.The depositional environments of the formation indicate a shallowing upward sequence, and volcanism was very active during the deposition of the upper part of the formation. The pumice breccia and andesitic pumice breccia units were deposited in a relatively short time. Keywords: age, stratigraphy, lithologic unit, fission track
MEMANEN HUJAN (RAIN HARVESTING) Sudarsono, U.
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 6 (2007): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Rainwater harvesting is one of groundwater conservation methods that collects rain water on the roof and stores it into aquifer. For the purpose of this investigation, a research has been conducted at the Centre of Environmental Geology, Bandung.in this location, the water harvesting potential is 8340.00 m3/year, however,  the rainwater that will be harvested, is 3614.00 m3/year and 1260.00 m3/year has been stored in the aquifer.An experiment well with 15.00 cm in diameter and 43.00 metres deep was constructed on this site. In the study area, an aquifer system is Quaternary Pumiceous Tuff (Qyt).  The aquifer is situated at the depth of 10.00 to 37.00 metres and it consists of medium to coarse grained gravely sands.   The hydraulic conductivity of the aquifer is l.80x10-3 cm /second, the water table is situated at 5.66 metres below the surface. The recharge rate of the well is 1800.00 m3/hour of water.For optimizing, the harvesting of rainwater several wells with various diameters (20.00 to 60.00 cm) should be constructed in the site. Keywords: groundwater, rainwater harvesting, hydraulic conductivity,   artificial         recharge, storage
Changes in the Configuration of the Fresh Water Lens due to ASRRG, Western Part of the Tiny Pari Island, Seribu Islands, Jakarta, Indonesia Utomo, Edi Prasetyo; Purwoaminta, Ananta; Sudrajat, Yayat
Jurnal Geologi dan Sumberdaya Mineral Vol 18, No 1 (2017): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Pari Island (Pulau Pari) is a small coral island in the Seribu Islands group off the north coast of the Jakarta Capital Special Region. Government has planned to develop this island into a tourist attraction because of its beautiful environment. However, the government development plans have not included facilities to meet the demand for groundwater, which represents the principal resource to meet the demand for freshwater. Pari Island has limited resources of groundwater due to the small size of the area where recharge of groundwater from rainfall can take place. A problem will arise that with the increase of visitors to the island the demand for freshwater will increase, while  groundwater resources of the island are very limited and dominated by brackish and saline groundwater. The objective of this research was to explore the possibility to increase the resources of fresh groundwater of Pari Island to support the increasing demand of fresh water. The method employed in the research is the application of ASRRG technology by the injection of the largest possible volume of rainwater and monitor changes of electrical conductivity and geoelectrical resistivity. Installation of an ASRRG network proved effective in lowering the salinity of groundwater in small islands. By increasing pore volume from 30% to 60% salinity decreases by 77%, which is reflected by the effect that the fresh groundwater lens which before comprised brackish water became fresh water with a thickness of 2.5 meter. The gain in pore volume equaled the decrease in salinity.Key words: Artificial recharge, Island hydrology, Salt-water/fresh-water relations, Indonesia
Penelitian Lingkungan Pantai Wilayah Pesisir Kabupaten Cirebon, Jawa Barat Astjario, Prijantono
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 1 (2006): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

Nowadays, natural resources in Indonesia have been decreased because of the rapid increase in development and human population. It is most likely that marine resources will become a primary source in supporting our economics in the future.                  Marine and coastal zones seem to become areas of our main priority for industrial, agrobusiness, agroindustrial, settlement, tourism, transportation and harbour developmen. However, these areas are still having various problems or cases which couId cause their unoptimum development and managements.The decrease of seawater quality standard caused by high suspended polluted by solid and Iiquid waste, sea water intrusions, abrations and accretions, shoalings, floods, and dryness are some of  the various cases which can be found in the marine and coastaI zones. Another case which is not less important is human behaviour who have destructed mangroves and changed the function of swampy forest to become fishpond areas. The survey in the marine and coastaI areas, especially in the eastern coast of the Cirebon regency, aims to obtain data, in which these cases are potentially found by applying the coastal characteristic observation and remote sensing methods.
KONTROL SESAR TERHADAP POLA SEBARAN URAT KUARSA DAN MINERALISASI EMAS DAERAH KUTAWARINGIN, JAWA BARAT Wahyudiono, J.; Abdullah, C. Idham; Abidin, H. Z.
Jurnal Geologi dan Sumberdaya Mineral Vol 21, No 3 (2011): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The study area is located in Kutawaringin village, about 3.5 kilometers from Soreang city, the capital of Soreang district, Bandung regency. The purpose of this research is to show fault control on the research area that influence the distribution pattern of quartz veins and epithermal gold mineralization. Methodology in this research is initiated by literatur study. All data are compiled as overlaying maps to determine next step activities. Structural observations include macroscopic and mesoscopic. Results of the analyses are in form of structural geological map, main principal stresses distributions map and fault evolution map that could be valuable to develop a dilational zone map of the area. Structural geology investigation suggests that the main controls of the emplacement of andesit and dacite intrusive rocks as hydrothermal and metal minerals source are east-west trending dextral fault. Northwest-southeast trending normal fault are structural corridors along dilational zone. Quartz veins is distributed along dilational zone. The general trend of quartz veins is N 143°E/78°, relatively parallel to the dilational zone.Keywords : structures, dilational zone, alteration zone, mineralization, epithermal, Kutawaringin
Endapan Kipas Bawah Laut Kapur Akhir di Kalimantan Santy, Lauti Dwita; Sutjipto, Rachmat Heryanto
Jurnal Geologi dan Sumberdaya Mineral Vol 16, No 4 (2015): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Endapan kipas bawah laut berumur Kapur Akhir di Kalimantan, terdapat di dua tempat. Pertama di Tinggian Semitau Kalimantan Barat sebagai Formasi Selangkai dan Konglomerat Belikai. Kedua di Tinggian Meratus Kalimantan Selatan yang dikenal sebagai batuan sedimen Kelompok Pitap. Formasi Selangkai merupakan endapan turbidit jauhan (distal) dan Konglomerat Belakai merupakan endapan aliran gravitasi. Kelompok Pitap di Tinggian Meratus terdiri atas Formasi Pudak, Manunggul, dan Keramaian. Formasi Pudak tersusun oleh batuan sedimen klastika kasar (> pebble), merupakan endapan aliran gravitasi.  Formasi Manunggul tersusun oleh batupasir dan konglomerat yang merupakan endapan saluran. Formasi Keramaian tersusun oleh sedimen klastika halus yang merupakan endapan turbidit jauhan. Batuan sedimen kedua kelompok tersebut termasuk ke dalam endapan kipas bawah laut, dimana Formasi Selangkai serta Formasi Keramaian merupakan kipas bagian bawah (lower fan), Formasi Manunggul merupakan kipas bagian tengah (middle fan), dan Konglomerat Belikai serta Formasi Pudak merupakan kipas bagian atas (upper fan). Pengendapan batuan sedimen Kelompok Pitap, diawali oleh adanya tranportasi masa sebelum pengendapan dan pada waktu pengendapan, dan dicirikan oleh adanya endapapan slumping yang menunjukan terjadinya di daerah tidak stabil.  Sedangkan Formasi Selangkai dan Konglomerat Belikai diawali dengan turbidit dasar cekungan berupa laminasi halus, dan dicirikan oleh tidak adanya endapan slumping yang menunjukan bahwa pengendapannya terjadi di daerah yang stabil.
ORIGIN OF CRETACEOUS HIGH MAGNESIAN ANDESITES FROM SOUTHEAST KALIMANTAN Hartono, Udi; Isnu H. Sulistyawan, Raden
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 5 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

High magnesian andesites are found in the Cretaceous Haruyan volcanics in Southeast Kalimantan. The rocks have Mg# 67 – 69, but low concentrations of Ni (44 – 60 ppm), Cr (37 – 411 ppm) and, except two samples of 95UH23C and 96UH23, ratios of Sr/ Y are also low. Geochemical and tectonic studies show that the high magnesian andesites were originated from a subduction zone-type magma similar to that of the most “normal” Haruyan volcanics. Two possible origins of the Cretaceous high magnesian andesites are proposed. First, melting of the mantle wedge above the slab to produce a basaltic magma followed by crystal fractionation, especially olivine and pyroxene, during magma ascent to the surface resulted in a derivative magma with low Ni and Cr concentrations. A collision between the pre-Mesozoic Paternoster platform (microcontinent ?) and the Sundaland continent in the Upper Cretaceous-Lower Miocene might cause the magma ascent to pool immediately in the lower crust-upper mantle boundary. The impending magma then reacts with hot mantle peridotite to produce the high magnesian andesites. Secondly, the high magnesian andesite may resulted from a reaction between silicic magma and hot mantle peridotite. The collision may also cause lower crust melting resulted in granitic magma (? The Hajawa Granite), which then reacts with hot mantle peridotite to produce the adakite-type high magnesian magma, such as samples 95UH23C and 96UH23.Keywords : high magnesian andesites, Southeast Kalimantan, origin
MIKROFASIES DAN DIAGENESIS BATUGAMPING FORMASI BATURAJA DI LINTASAN AIR KITI, OKU, SUMATERA SELATAN Maryanto, Sigit
Jurnal Geologi dan Sumberdaya Mineral Vol 15, No 2 (2014): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Aspek mikrofasies dan diagenesis batugamping Formasi Baturaja di sepanjang lintasan Air Kiti, Sumatera Selatan, telah dipelajari guna mengetahui mekanisme pengendapan batuan dan sejarah proses geologi paska pengendapan batuan. Percontoh batugamping telah diambil secara sistematis pada formasi batuan yang berumur Miosen Awal tersebut, dan dipakai untuk bahan pengujian petrografi di laboratorium. Analisis petrografi telah dilakukan terhadap dua puluh empat puluh dua percontoh batugamping memperlihatkan bahwa jenisnya adalah batugamping mudstone, wackestone, packstone, floatstone, rudstone, bafflestone dan bindstone. Lingkungan pengendapan batugamping Formasi Baturaja meliputi fasies terumbu belakang, bangunan terumbu, sayap terumbu dan terumbu depan. Beragam proses diagenesis pasca pengendapan batuan, yang meliputi: bioturbasi, penyemenan, neomorfisme, pemikritan, pemampatan, peretakan, dan pelarutan.Kata kunci: Baturaja, batugamping, petrografi, mikrofasies, diagenesis.
POLEN PALEOGEN-NEOGEN DARI DAERAH NANGGULAN DAN KARANGSAMBUNG JAWA TENGAH Polhaupessy, A.A
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 5 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

A research on palynomorph fossils is presented in this paper. Pollen samples were collected from Paleogene and Neogene rocks containing carbon materials and organic remains. The aim of this study is to better understanding the pollen distribution, age and their depositional environments as a final result. Pollen fossils from Nanggulan area suggest an age of Eocene – Oligocene, while that from Karangsambung indicates Middle Eocene – Pliocene. All of pollen, both from Nanggulan and Karangsambung were deposited in littoral environments.  Keywords: Nanggulan, Karangsambung, pollen

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