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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. 17 No. 2 (2022): Buletin Sumber Daya Geologi" : 5 Documents clear
KARAKTERISASI STRUKTUR PATAHAN PADA LAPANGAN PANAS BUMI X (SUMATRA) BERDASARKAN PEMETAAN GEOLOGI, PENGINDERAAN JAUH, DAN DATA GAYA BERAT: FAULTS CHARACTERIZATION IN X GEOTHERMAL FIELD (SUMATRA) BASED ON GEOLOGICAL MAPPING, REMOTE SENSING AND GRAVITY DATA Sri Mulyani; Yunus Daud; Riza G. Pasiki; Haris Siagian
Buletin Sumber Daya Geologi Vol. 17 No. 2 (2022): 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.v17i2.327

Abstract

Fault structure plays an important role in a geothermal system. Faults can be weak zones that are the location of intrusions that are related with heat sources, the location of permeability for reservoar, and as the fluid flow path to the surface that appears as manifestation. By understanding the characterization and distribution of geological structures in geothermal fields, the conceptual model of geothermal systems can be better understood, so the risk of counter-inaccuracies in the development of geothermal at the subsurface can be minimized. Field X is located on the Sumatra Island, known as development field that still trying to get the optimal well location for production. This study reveals how to identify faults in Geothermal Field X using gravity data analysis, remote sensing and geological mapping results. In detail, the gravitational data analysis includes checking the quality data, calculating and mapping of the residual and regional data, FHD, SVD, and 3D gravity modelling. Remote sensing data that analysed in the form of LIDAR rendering data, data used from geological mapping results are location and strike of faults. The results of this study are model and map of the faults distribution in geothermal field X that can be used as reference to understand the geothermal system, as well as the guidance for the well targeting.
KARAKTERISTIK ENDAPAN LATERIT NIKEL DAN UNSUR TANAH JARANG DI DAERAH PULAU GEBE, HALMAHERA TENGAH, MALUKU UTARA : CHARACTERISTICS OF NICKEL LATERITE DEPOSITS AND RARE EARTH ELEMENTS IN GEBE ISLAND, CENTRAL HALMAHERA, NORTH MALUKU Rabbani Rafif Abidin; Very Susanto; Sulaeman; Hartaja M. Hatta Wicaksono
Buletin Sumber Daya Geologi Vol. 17 No. 2 (2022): 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.v17i2.345

Abstract

Nickel laterite is a product of weathering of ultramafic rocks that have an abundance of olivine and orthopyroxene minerals. Geology in the Gebe Island, Central Halmahera Regency, North Maluku Province is composed of limestone, which is equivalent to the Waigeo Formation which has an inconsistent relationship with the underlying ultramafic rocks as carriers of laterite nickel deposits. Weathering of ultramafic rocks produces a different profile and character of laterite nickel. This study aims to determine the characteristics of laterite and rocks from the area and to determine the characteristics of rare earth elements. Based on the results of the study, it is known that laterite nickel carriers in the area are dunite. Laterite nickel deposit profile on the island consists of red limonite, yellow limonite, and saprolite. The red limonite zone is characterized by a relatively high Fe2O3 content and a strong degree of lateritization; the yellow limonite zone is characterized by a relatively high Al2O3 content and a weak to strong lateritization degree; the saprolite zone is characterized by a relatively high MgO and SiO2 content. In general, laterite Ni deposits in the study area show relative enrichment of REE to bedrock and LREE content is more abundant than HREE content. Based on the spearman correlation, the main controller of LREE(La-Eu) and HREE(Gd-Lu) enrichment is Fe mineral with the spearman coefficient value between LREE(La-Eu) and HREE(Gd-Lu) with Fe2O3 is 0,64-0,83. While the main controller of Sc enrichment is Al mineral with the spearman coefficient value between Sc and Al2O3 being 0,59.
POLA STRUKTUR GEOLOGI PEMBENTUK ZONA MINERALISASI DI BUKIT RANDU, KECAMATAN SELOGIRI, KABUPATEN WONOGIRI, JAWA TENGAH: GEOLOGICAL STRUCTURE PATTERNS FOR THE MINERALIZATION ZONE IN BUKIT RANDU, SELOGIRI DISTRICT, WONOGIRI REGENCY, CENTRAL JAVA Asmoro Widagdo; Gentur Waluyo; Rachmad Setijadi; Mochammad Aziz; Huzaely Latief Sunan
Buletin Sumber Daya Geologi Vol. 17 No. 2 (2022): 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.v17i2.351

Abstract

Mineralization in the Bukit Randu area and its surroundings is formed by geological structures to be investigated.This study uses data on fault striation, quartz vein plane and quartz veinlet plane. This study aims to determine the main structural pattern forming the mineralization zone. This research is useful for determining the geological structure model in the Randu Hill area. The research method was carried out through data collection in the field and analysis in the laboratory. Field data collection includes striation data measurement, quartz vein plane measurement, quartz veinlet plane and quartz vein sampling. Laboratory analysis includes stereographic analysis of striation and rose diagram analysis of vein and veinlet measurement data, and vein polishing mineragraphy. Quartz vein and veinlet mineralization in the Randu Hill area is controlled by a right lateral strike-slip fault trending northwest-southeast and a north-south normal fault. This mineralized zone is a north-south trending transtension zone due to en-enchelon right stepping of right lateral strike-slip fault. Precious metal minerals are located in the north-south trending veins in the same direction as the regional compression stress and normal faults.
STUDI GEOKIMIA TANAH DAN HUBUNGANNYA DENGAN MINERALISASI LOGAM DAERAH KETUNGAU HULU, KABUPATEN SINTANG, PROVINSI KALIMANTAN BARAT: STUDY OF SOIL GEOCHEMISTRY AND IT’S RELATIONSHIP WITH THE PRESENCE OF METAL MINERALIZATION IN KETUNGAU HULU AREA, SINTANG REGENCY, WEST KALIMANTAN PROVINCE Nicolaus Bagus Krismantoro; Nurcahyo Indro Basuki; Hartaja Hatta Wicaksono; John Mauritz
Buletin Sumber Daya Geologi Vol. 17 No. 2 (2022): 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.v17i2.352

Abstract

Ketungau Hulu is a gold prospect plan area in Sintang-Silantek Block on the island of Kalimantan which is a collaboration program between Indonesia (Geological Agency) and Malaysia (Jabatan Mineral and Geoscience). Administratively, the research area is located in Sintang Regency, West Kalimantan with an area of 18 km2. This study aims to identify the geological conditions, structure, alteration, and mineralization of the study area as well as potential anomalies for metal elements (Au, Cu, Pb, Zn, and Mn) based on soil geochemistry data and its relationship with the presence of mineralization. The study was conducted using soil samples from 84 points in the ridge and spur areas. In addition to soil samples, 48 rock samples and one sample from pan concentrate were also obtained. Furthermore, all samples were analyzed for chemical, geochemistry, statistic, petrology, petrographic, and mineragraphy. The research area consists of Greywacke Sandstone Unit, Arenite Sandstone Unit, and Diorite Intrusion Unit. Geological structure that developed in the area has relatively NNW-SSE and NW-SE trends. The alteration zones present in the research area are argillic zone and propylitic zone. Mineralization is found in dogtooth, crustiform, colloform, and assicular textured quartz veins with relative orientation directions NW-SE and NNE-SSW that presence of ore minerals such as native Au, chalcopyrite, pyrite, sphalerite, covellite, and from base metal contents abundance in the rock samples. The results of soil sample analysis showed that the Au had an anomaly value of log 1.90 ppb, Pb of sqrt 7.44 ppm, Zn of log 1.92 ppm, Cu of log 1.69 ppm, and Mn of log 2.46 ppm. Base metal elements anomaly is controlled by lithology, structure, and topography. Analysis using Pearson's product on base metal elements states that there are two groups of elements i.e., Au and Pb-Zn-Cu-Mn. Based on the anomaly distribution of base metal elements in soil and the presence of mineralization, it can be interpreted that there are four prospect area i.e., KU-1, KU-2, BE-1, and BE-2 prospects.
IDENTIFIKASI KETERDAPATAN MINERAL IKUTAN DAN ESTIMASI KANDUNGAN MONASIT PADA TAILING TAMBANG TIMAH DI PULAU BANGKA: IDENTIFICATION OF ACCESSORY MINERAL OCCURRENCE AND CONTENT ESTIMATION OF MONAZITE IN TIN MINE TAILINGS IN BANGKA ISLAND Ngadenin; Rachman Fauzi; Widodo
Buletin Sumber Daya Geologi Vol. 17 No. 2 (2022): 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.v17i2.353

Abstract

Mining activities in Bangka Island are being conducted since Dutch colonial era. The wastes of tin mining produced many abandoned tailings which could cause negative impact for environment. However, there are accessory minerals in tailings which could be the new potential source of critical mineral. The purpose of this study is to identify accessory minerals and content percentage of monazite in tailings of ex – tin mine in Bangka Island. The methods used in this study is determining the composite minerals based on grain counting analysis of 30 pan concentrate samples from several locations in Bangka Island before estimating the monazite content based on comparison between monazite percentage, pan concentrate mass, and tailing bulk mass. Based on mineral identification it is shown that the tailings consist of several minerals such as cassiterite, monazite, zircon, ilmenite, magnetite, hematite, anatase, rutile, tourmaline, fluorite, garnet, and pyrite with average monazite content in concentrate sample is 10.24%. Based on the calculation it is shown that the average value of monazite grade in tin mine tailing is 16.41 kg/ m3. The result of this study is expected to be some input for stakeholders to implement mineral conservation for achieving sustainable mining in the future.

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