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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 20 No 2 (2025): Buletin Sumber Daya Geologi" : 5 Documents clear
A NEW FRAMEWORK FOR CLASSIFICATION AND QUANTIFICATION OF GEOTHERMAL DIRECT USE RESOURCES AND RESERVES IN INDONESIA: KERANGKA KERJA BARU UNTUK KLASIFIKASI DAN KUANTIFIKASI SUMBER DAYA DAN CADANGAN PEMANFAATAN LANGSUNG PANAS BUMI DI INDONESIA Husin Setia Nugraha; Husin; Rina Wahyuningsih; Dudi Hermawan; Dikdik Risdianto
Buletin Sumber Daya Geologi Vol 20 No 2 (2025): 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.v20i2.447

Abstract

Geothermal direct use (GDU) in Indonesia holds significant potential for supporting energy security and local economic development, yet its growth has been hindered by the absence of technical standards for potential assessment. In contrast to the well-established indirect use for electricity generation, officially recorded GDU potential remains minimal. This study aims to establish and apply a standardized framework for the classification and quantification of GDU potential and utilization in Indonesia. The developed methodology introduces a potential classification system based on two primary criteria: the quality of fluid data/information and the results of a reserve feasibility study. The potential is categorized into two main classes: Resources (Indicated, Measured) and Reserves (Probable, Proven). Quantification formulas for potential (in MWt) and utilization (installed capacity, capacity factor, annual utilization, and capacity-to-reserve ratio) are also formulated. The initial implementation of this methodology reveals that Indonesia possesses a GDU potential of at least 230 MWt from 201 inventoried prospects, which constitutes approximately 56% of all identified prospects. Of this amount, approximately 8.1 MWt has been successfully classified as Proven Reserves. This standardized framework is expected to serve as a credible national reference for resource inventory, development planning, and attracting investment in the geothermal direct use sector.
ESTIMATION OF LATERITE BAUXITE VOLUME USING ORDINARY KRIGING METHOD IN PIASAK VILLAGE, SANGGAU DISTRICT, WEST KALIMANTAN: ESTIMASI VOLUME BAUKSIT LATERIT MENGGUNAKAN METODE ORDINARY KRIGING DI DESA PIASAK, KABUPATEN SANGGAU, KALIMANTAN BARAT Murti, Tiffany Budi; Eldoni, Andika; Muhardi; Perdhana, Radhitya
Buletin Sumber Daya Geologi Vol 20 No 2 (2025): 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.v20i2.493

Abstract

West Kalimantan Province is one of the largest bauxite-producing areas in Indonesia, with total reserves of 0.85 billion tons from 1.26 billion tons of national reserves. One of the areas with potential bauxite in Sanggau Regency, West Kalimantan, is Piasak Village. Estimating bauxite resources is an essential step in identifying reserves in a mining area. This study aims to estimate the volume of laterite bauxite in Piasak Village, Sanggau Regency. This study applies the ordinary kriging estimation method based on test pit samples at 47 locations. Data processing was conducted using QGIS and Saga GIS software. The statistics calculation of bauxite deposit thickness data obtained a coefficient of variation of 0.2, indicating that the samples were homogeneous. The spherical semivariogram model was used for the kriging estimation process of bauxite deposit thickness because it had the smallest root mean square error. The parameter values for nugget, sill, and range were 0.08 m2, 1.15 m2, and 100.9 m, respectively. The estimation results show that the volume of laterite bauxite at the study site is 180,051 m3, while the volume of overburden is 56,796 m3.
KONTROL STRUKTUR TERHADAP ALTERASI DAN MINERALISASI PADA CEBAKAN EPITERMAL PROSPEK SECANG, KECAMATAN CAMPUR DARAT, KABUPATEN TULUNG AGUNG, PROVINSI JAWA TIMUR: STRUCTURAL CONTROL ON ALTERATION AND MINERALIZATION OF EPITHERMAL DEPOSIT SECANG PROSPECT, CAMPUR DARAT SUB DISTRICT, TULUNG AGUNG DISTRICT, EAST JAVA PROVINCE Fadilah, Rizqi; Vanessa, Agata; Patonah, Aton; Haryanto, Iyan
Buletin Sumber Daya Geologi Vol 20 No 2 (2025): 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.v20i2.519

Abstract

The study area is located within the administrative district of Campurdarat Subdistrict, Tulungagung Regency, East Java Province. This research aims to analyze the role of geological structures on alteration and mineralization processes using geological and alteration mapping method, joint measurement, petrographic and mineragraphic analysis, and spectral data interpretation. The geological mapping results indicate that the lithostratigraphy of the study area, from youngest to oldest, consists of Alluvial Unit (Sa), Limestone Unit (Sbg), Volcanic Breccia Unit (Sbv), and Andesite Lava Unit (Sla). The geological structures include faults and joints, formed through a wrench fault mechanism, indicating left-lateral movement with the formation of a transpressional pop-up structure. Alteration zones belong to the high-sulfidation epithermal deposit system, consisting of four alteration types, comprising silicifaction, advanced argillic, argillic, and propylitic. Mineralization in the study area is associated with veins and vuggy quartz. Ore minerals present include pyrite, chalcopyrite, sphalerite, marcasite, magnetite, rutile, and covellite. Alteration and mineralization in the study area are controlled by northeast-southwest and northwest-southeast strike-slip faults. Faults in the study area have caused alteration overprinting and fault zones.
PENENTUAN ZONASI POTENSI MINERAL LOGAM DI DAIRI SUMATRA UTARA BERDASARKAN DATA GEOSAINS TERINTEGRASI: DETERMINATION OF THE POTENTIAL ZONING OF METALLIC MINERALS IN DAIRI NORTH SUMATRA BASED ON INTEGRATED GEOSCIENCE Nazirah Saina; Dzil Mulki Heditama; Iwan Nursahan; Prihadi Sumintadiredja
Buletin Sumber Daya Geologi Vol 20 No 2 (2025): 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.v20i2.527

Abstract

Based on previous investigations by PSDMBP The Dolok Pangkuruhan area in Dairi Regency is known to have prospects for gold and other metal minerals deposits. This study aims to analyze the characteristics of mineralization and alteration, as well as to determine the potential zones of metal minerals through the integration of geological, geochemical, and geophysical data. The analytical methods used in this study include petrography, mineragraphy, X-ray Diffraction (XRD), Portable Infrared Mineral Analyzer (PIMA), statistical geochemistry, and geoelectric methods, specifically Induced Polarization (IP) and Resistivity. The results show three main lithological formations: phyllite, metasedimentary sandstone, and tuff. The types of alteration identified in the study area include argillic (illite-halloysite-kaolinite), argillic-propylitic (illite-intchlorite), phyllic (quartz-pyrite-chlorite), and phyllic-silicified (quartz-muscovite-illite). Based on the integration of geological, geochemical, and geophysical data, the potential metal mineral zones were identified in the subsurface six lines, specifically at line 5 prospect zone (Zn-Pb-Ag) and line 8 prospect zone (Au-Pb). Each line exhibits high chargeability values (100-190 ms) and moderate to high resistivity values (100-31623 ohm.m). The element concentration with the highest value of Zn is (11000 ppm), Pb ranges from (2324-4753 ppm), Au concentrations range from (1525-3 ppm) and Ag concentrations are the smallest, ranging from (10-25 ppm).
CHARACTERIZATION AND SPATIAL DISTRIBUTION OF ACIDIC MINERALS BASED ON PAD 9 WELL IN THE PATUHA GEOTHERMAL FIELD, WEST JAVA: KARAKTERISASI DAN IDENTIFIKASI ZONA PENYEBARAN MINERAL ASAM PADA SUMUR PAD 9 DI LAPANGAN PANAS BUMI PATUHA, JAWA BARAT Aristo, Muhammad Kurniawan Agung; Suryantini; Idham Andri Kurniawan; Ezidin Reski; Randy Wijaya Atmaja
Buletin Sumber Daya Geologi Vol 20 No 2 (2025): 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.v20i2.554

Abstract

Since 2021, PT Geo Dipa Energi has drilled a total of 19 exploration wells to support the development of Patuha Unit-2. Several of these wells are located approximately 1 km from Kawah Putih, an acid vapor core chimney with a pH of less than 2, which has the potential to produce virulent fluids that contribute to the formation of acid-alteration minerals in the wells. This study aims to identify the presence of acid-type minerals, characterize these minerals, estimate their distribution zones, and interpret the formation processes based on data from wells 9-V2 and 9-Z2. The methods employed include modifications to the latest volcanostratigraphic map, macroscopic, microscopic, and XRD analyses of cutting and core samples from wells 9-V2 and 9-Z2, and mineral alteration characterization encompassing alteration type, pattern, intensity, and paragenesis. Well-to-well correlations were established based on spatial position, depth, hydrology, and volcanostratigraphy. The updated volcanostratigraphic map identifies 12 volcanic units (11 domes and 1 maar), with Kawah Putih representing the youngest unit. Identified acid-type minerals include anhydrite and diaspore. The formation of these minerals occurs through direct precipitation and replacement processes, with moderate to strong alteration intensity. Acid mineral formation is overprinted by later alteration under more neutral pH conditions. In the well group 9, the formation of acid-type minerals is interpreted to result from the lateral mixing of virulent fluids with shallow groundwater. This mixing process is characterized by the presence of calcite and other minerals enriched in Mg.  

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