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Buletin Sumber Daya Geologi
Published by Pusat Sumber Daya Mineral Batubara dan Panas Bumi
ISSN : 19075367     EISSN : 25801023     DOI : -
Core Subject : Science, Education, Social, Engineering,
Education Energy Engineering Environmental Science
uletin Sumber Daya Geologi merupakan Makalah berkala ilmiah terakreditasi LIPI bidang mineral, energi fosil, dan panas bumi. Makalah ini terbit tiga nomor dalam satu tahun pada bulan Mei, Agustus dan November. Pada Tahun 2010, Buletin Sumber Daya Geologi mendapat Akreditasi B sebagai majalah Berkala Ilmiah, kemudian akreditasi ulang Tahun 2012, dan akreditasi terbaru di Tahun 2015 untuk tiga tahun kedepan dengan nomor ISSN (print) : 1907-5367. Tahun 2017 Buletin Sumber Daya Geologi mendapatkan nomor eISSN : 2580 - 1023 untuk versi onlinenya.
Arjuna Subject : -
Articles 5 Documents
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Search results for , issue "Vol. 16 No. 3 (2021): Buletin Sumber Daya Geologi" : 5 Documents clear
ANALISIS CITRA SATELIT LANDSAT 8 DAN DEMNAS UNTUK IDENTIFIKASI PROSPEK PANAS BUMI DI KABUPATEN ACEH TENGAH, PROVINSI ACEH: LANDSAT 8 AND DEMNAS IMAGES ANALYSES TO IDENTIFY GEOTHERMAL PROSPECT IN CENTRAL ACEH REGENCY, ACEH PROVINCE Husin Setia Nugraha; Lano Adhitya Permana; Sukaesih
Buletin Sumber Daya Geologi Vol. 16 No. 3 (2021): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v16i3.322

Abstract

Combined analyses of Landsat satellite image and Digital Elevation Model Nasional (DEMNAS) are used to identify geothermal prospect areas. The analyses are applied in Aceh Tengah Regency because the information of springs exists in the regional geological map of Takengon. Two methods are applied to DEMNAS, namely the FFD method and circular features visual interpretation. Land Surface Temperature (LST) and Direct Principal Component Analysis (DPCA) methods are employed on Landsat 8 image. The appearance of circular features, anomalies of LST, and the existence of high-temperature mineral indicators are used to predict heat source indication. In addition, the FFD method is employed to indicate high permeability zones. The research shows that heat source indication is predicted at Mt. Telege Volcanic Complex within the District of Atu Lintang. The heat source is indicated by circular features appearance and LST anomalies within the area. Furthermore, the FFD method reveals an outflow zone near the hot spring of the northern part of Mt. Telege. In addition, the implementation of the DPCA method could not clearly separate between advanced argillic dan propylitic zones from their mineral indication values. It is due to mixing values among several mineral indicator values within the same pixel. In general, the application of the remote sensing method in Aceh Tengah Regency could help to indicate an early possibility of geothermal system exist within the area.
STUDI POTENSI TERBENTUKNYA CEBAKAN MINERAL RADIOAKTIF PADA BATUAN GRANITIK DI PULAU SULAWESI: THE STUDY ON THE POTENTIAL OF RADIOACTIVE MINERAL DEPOSITS FORMATION IN GRANITIC ROCKS IN SULAWESI ISLAND Ngadenin; Widodo; Fauzi, Rachman; Pratiwi, Fadiah
Buletin Sumber Daya Geologi Vol. 16 No. 3 (2021): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v16i3.331

Abstract

In the Island of Sulawesi, there are many granitic rocks which have potential for containing radioactive mineral deposits. The purpose of this study is to determine the type of radioactive mineral deposits based on radioactivity, uranium grade, and mineralogy characteristics of certain granitic rocks. The data used comprise radioactivity measurement, uranium content, megascopic and petrographic observations of rocks, and grain analysis of heavy mineral of granitic rocks from uranium exploration on the island of Sulawesi. The granitic rocks consist of granite, biotite granite, granodiorite, biotite granodiorite, hornblenda granodiorite, hornblenda biotite granodiorite, biotite hornblenda granodiorite, biotite adamelite, hornblenda biotite adamelite, biotite hornblenda diorite, diorite, biotite hornblenda diorite and syenite. The radioactivity of granitic rocks is 50 to 1,200 c/s and uranium content is 0.54 to 36 ppm. Radioactive minerals found in granitic rocks consist of zircon, monazite, alanite, thorite, and branerite. The potential occurrence of radioactive mineral deposits on the island of Sulawesi are placer-type thorium deposits at the modern deltas and coasts.
KARAKTERISTIK STRUKTUR GEOLOGI DAN PERANANNYA TERHADAP SISTEM PANAS BUMI NAGE, KABUPATEN NGADA, PROVINSI NUSA TENGGARA TIMUR: STRUCTURAL GEOLOGY CHARACTERISTICS AND ITS ROLES TO THE NAGE GEOTHERMAL SYSTEM, NGADA DISTRICT, EAST NUSA TENGGARA PROVINCE Pradipta, Devito; Adhitya Permana, Lano; Muhammad Ramdhan, Divi
Buletin Sumber Daya Geologi Vol. 16 No. 3 (2021): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v16i3.332

Abstract

Nage Region is part of Sunda-Banda Arc volcanism which formed an en-echelon array in Flores Island. The complex regional tectonics setting of the study area has created intensively found geological structures in the study area. The study was made through identification of structural geology by topographic lineament analysis, river lineament, circular features, and fault fracture density in DEMNAS image and followed by field observation to identify primary and secondary geological structures in 87 stations.The measurements of 441 geological structures positions in the study area found that secondary geological structures, mainly shear fractures, in order to identify the occurence of minor faults which are found in Quarternary rocks in the study area. Kinematic analysis of minor faults confirms the occurence of NW-SE and NE-SW oblique strike slip faults and also NE-SW directed strike slip fault. Normal faults in the study area are ffound as circular features which has been formed and associated with caldera collapse and crater forming processes. Dynamic analyses of faults are conducted to determine the principle compressive stress orientation which formed the faults has concluded that the compressional regime of the study area occured in the NNE-SSW direction with maximum stress (σ1) direction is 16°, N 203°E and minimum stress (σ3) direction is 17,5°, N 297,1°E. Faults are interpreted to have roles as fluid pathway in the developing geothermal system based on the occurence of hotspring manifestation and hydrothermal alteration. Based on the configuration of faults, geothermal manifestation, and hydrothermal alteration, it can be concluded that there are at least three fluid flow in the study area which are correlated with hydrothermal fluid ascent through fault F1 and bounded by fault F3, hydrothermal fluid ascent through fault F2, and hydrothermal fluid ascent from boiling through fault F10
PENENTUAN DAERAH PROSPEK MINERALISASI MENGGUNAKAN METODE GEOKIMIA TANAH, DAERAH NANGA BANGIK, KECAMATAN BOYAN TANJUNG, KABUPATEN KAPUAS HULU, PROVINSI KALIMANTAN BARAT: DETERMINATION OF MINERALIZATION PROSPECTS BY SOIL GEOCHEMISTRY METHOD IN NANGA BANGIK AREA, BOYAN TANJUNG DISTRICT, KAPUAS HULU REGENCY, WEST KALIMANTAN PROVINCE Sulaeman; Ernowo; Widhiyatna, Denni
Buletin Sumber Daya Geologi Vol. 16 No. 3 (2021): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v16i3.334

Abstract

The tropical climate of Indonesia causes rock weathering. Soil from weathered rocks can be analyzed to determine the anomalies element to define the mineralization prospect areas using the geochemical methods. This study was carried out in the Nanga Bangik area with geological conditions favorable for mineralization. A total of 135 soil samples were collected from horizon B along ridge and spurs with sample intervals 75 - 100 meters. All samples were analyzed at the laboratory of the Center for Mineral Coal and Geothermal Resources in Bandung. Geochemical analysis was conducted using the Atomic Absorption Spectroscopy method, for the elements of Cu, Pb, Zn, Fe, Mn, Ag, and Au. Statistical distribution analysis, threshold calculation using mean+2SDEV and Median+2MAD and correlation between Factor Analysis were combined to determine the anomalies areas. Based on the calculation of the threshold using two different statistical methods, several anomalous values and groups of three factors were obtained: Factor 1: Pb-Fe-Zn-Ag Factor 2: Mn-Cu and Factor 3 in the form of element Au which was interpreted by the presence of metal mineralization. Three mineralization prospect areas were found in Bukit Empajak, Bukit Pirang and Bukit Limau.
KARAKTERISTIK ALTERASI DAN MINERALISASI CEBAKAN TEMBAGA DI DAERAH SETELUK DAN SEKITARNYA, KABUPATEN SUMBAWA BARAT, PROVINSI NUSA TENGGARA BARAT: THE CHARACTERISTIC OF ALTERATION AND MINERALIZATION OF COPPER DEPOSITS IN SETELUK AREA AND ITS SURROUNDING, WEST SUMBAWA DISTRICT, WEST NUSA TENGGARA PROVINCE Widi, Bambang Nugroho; Edya Putra
Buletin Sumber Daya Geologi Vol. 16 No. 3 (2021): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v16i3.336

Abstract

The research was conducted by the background of gold mining community around the research area. The purpose of the study was to know the continuity and type of mineralization that had been previously found outside the study area. The methods used include geological mapping and geochemical sampling of river sediments, rocks and pan concentrates. Laboratory analysis carried out at PSDMBP includes chemical analysis of the AAS method, petrographic examination, mineragraphy, grain mineralogy and Spec-Terra. Mineralization in the Seteluk area and its surroundings is one of the most interesting forms of mineralization occurring in intrusive granodiorite, volcanic and sedimentary rocks. There are three forms of indication of mineralization, namely; Firstly is low sulfidation epithermal mineralization, characterized by the presence of quartz veins breaking through the argillic zone (illite, montmorillonite, and kaolinite) in the sandstone with mineral associations of chalcopyrite, sphalerite, galena and pyrite. Both high sulfidation epithermal mineralizations are characterized by the presence of massive silica in which there is a localized vuggy silica structure of sulfur with alteration minerals of pyrophyllite, jarosite, and pyrite sulfide. The three porphyry indications are thought to occur in granodiorite with the main characteristics of epidote alteration, chlorite with veinlets and magnetite spots. The identified metallic minerals have associations of magnetite, ilmenite, chalcopyrite, galena, sphalerite, covelite and iron oxide. The results of rock chemistry analysis showed the highest Au content was 98 ppb; Cu 774 ppm, Pb 7993 ppm and Zn 23007 ppm. Indications of Au and Cu mineralization are also known from panning results in the form of gold and chalcopyrite grains with the percentage of chalcopyrite grains reaching 53%. The alteration and mineralization pattern shows the appearance of magnetite with ilmenite, chalcopyrite and pyrite in the granodiorite intrusion which is estimated to be a potassic zone (?) then towards the outside of the silica zone, advanced argillic, argillic zone and the outermost propylite zone. This area is thought to be a porphyry (?) type mineralization system in the interior, followed by high sulfidation and then low sulfidation epithermal mineralization with mineralization centers estimated to be below the surface.

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