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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 754 Documents
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POTENSI PENGEMBANGAN GASIFIKASI BATUBARA BAWAH PERMUKAAN DI DAERAH ASAM-ASAM, KABUPATEN TANAH LAUT, KALIMANTAN SELATAN: DEVELOPMENT POTENTIAL OF UNDERGROUND COAL GASIFICATION IN ASAM-ASAM AREA, TANAH LAUT REGENCY, SOUTH KALIMANTAN Muhammad Iqbal Ardiansyah; Ahmad Helman Hamdani; Nurdrajat
Buletin Sumber Daya Geologi Vol 20 No 3 (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.v20i3.539

Abstract

The potential of underground coal resources in Indonesia has not been fully exploited yet, necessitating new mining methods, one of which is underground coal gasification (UCG). The Asam-asam Basin is one of Indonesia's coal-producing basins that warrants further research regarding the potential development of UCG in the area. This study identifies the geological criteria of coal seams, such as seam thickness, depth, rank, seam dip, surrounding rock types, geological structure, and coal inventory located in the Asam-asam area.Data were collected through core drilling and well logging analysis at 4 boreholes (MIA004–MIA007). The results indicate that the area contains 9 coal seams: A, B, C, D, E, F, G, H, and I. Coal seam thickness varies from 0.49 meter to 18.95 meters, with surrounding rocks predominantly consisting of claystone, and some seams interbedded by sandstone and siltstone. The coal rank is primarily high volatile bituminous. Seams B, C, F, G, and H meet the coal inventory criteria. Evaluation using analytical hierarchy process (AHP) method indicates that Seam F has the highest potential for UCG development, with an average score of 0.78.
KARAKTERISASI MANIFESTASI TERMAL MENGGUNAKAN METODE RASIO SALURAN, LAND SURFACE TEMPERATURE, DAN NORMALIZED DIFFERENCE VEGETATION INDEX DI LAPANGAN PANAS BUMI GUNUNG PAPANDAYAN, JAWA BARAT: CHARACTERIZATION OF THERMAL MANIFESTATION USING BAND RATIO, LAND SURFACE TEMPERATURE, AND NORMALIZED DIFFERENCE VEGETATION INDEX METHODS IN PAPANDAYAN MOUNTAIN GEOTHERMAL FIELD, WEST JAVA Satriyo, Muhammad; Fadillah Azhar Deaudin Kurniawan; Tony Rahadinata; Santia Ardi Mustofa
Buletin Sumber Daya Geologi Vol 20 No 3 (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.v20i3.515

Abstract

The research area is located in the Gunung Papandayan Geothermal Field, which is interesting to study further due to several thermal manifestations found on the surface. However, a detailed remote sensing study accompanied by field validation has never been conducted in this field. Thus, this study aims to conduct a more detailed remote sensing analysis to describe the characteristics of thermal manifestations in the field that can be a reference for direct observation and support analysis in detailed geoscience studies. The remote sensing analysis performed is visual image analysis, surface temperature analysis, vegetation stress analysis, and band ratio analysis. The results showed that thermal manifestations can be found in the Papandayan Crater and Tegal Alun areas. The presence of manifestations is characterized by areas that have little to no vegetation in visual image observations, high land surface temperature (LST) anomalies, and normalized difference vegetation index (NDVI) values less than 0.3. Meanwhile, alteration minerals were identified from several band ratio analyses conducted.
DELINEASI AREA PROSPEK DAN KARAKTERISASI RESERVOIR PANAS BUMI NON-VULKANIK UNTUK PEMANFAATAN LANGSUNG DI BANDA BARU, MALUKU TENGAH: PROSPECT AREA DELINEATION AND CHARACTERIZATION OF NON-VOLCANIC GEOTHERMAL RESERVOIRS FOR DIRECT USE IN BANDA BARU, CENTRAL MALUKU Melisano, Erawan; Nugraha, Husin Setia; Rahadinata, Tonny; Sumintadireja, Prihadi
Buletin Sumber Daya Geologi Vol 20 No 3 (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.v20i3.548

Abstract

The significant disparity between Indonesia's geothermal direct-use potential (230 MWt) and its current utilization (8 MWt) necessitates precise delineation methods for non-volcanic systems. This study aims to characterize the shallow reservoir and delineate the prospect area in Banda Baru, Central Maluku, using integrated geoscience data. A GIS-based Multi-Influencing Factor (MIF) method was applied to map groundwater potential, which was then synthesized with surface CO2 gas anomalies and Magnetotelluric (MT) resistivity gradient modeling. The results identified a 6.49 km2 prospect area controlled by fracture structures within metamorphic rocks. Validation through the BBR-1 temperature gradient well drilling showed significant success, encountering 95°C fluid at a depth of 164 meters. This finding prompted a re-evaluation of geophysical interpretations, proving that low resistivity values (<50 ohm-m) represent active thermal aquifers rather than conventional clay caps. Based on production tests, the total measured resource potential in this region is estimated at 6.3 MWt. This integrated modeling provides a strategic instrument for efficient non-volcanic geothermal development to support the local economy through sustainable direct-use schemes.
HUBUNGAN KONDISI GEOLOGI TERHADAP SEBARAN KADAR CU-AU BERDASARKAN DATA INTI PENGEBORAN PROSPEK TUMPANGPITU, DAERAH SUMBERAGUNG, BANYUWANGI, JAWA TIMUR: RELATIONSHIP BETWEEN GEOLOGICAL CONDITIONS AND Cu-Au GRADE DISTRIBUTION BASED ON DRILL CORE DATA FROM TUMPANGPITU PROSPECT, SUMBERAGUNG AREA, BANYUWANGI, EAST JAVA Riyanto, Putri Rindu Bunga Kasih; Dadan Wildan; Achmad Djumarma Wirakusumah; Tatik Handayani; Riansyah Widisaputra
Buletin Sumber Daya Geologi Vol 20 No 3 (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.v20i3.549

Abstract

The research area is located in Pesanggaran, Banyuwangi, East Java, situated in the central part of the Sunda-Banda magmatic arc, with potential for mineralization. The research aims to identify geological conditions, alteration zones, mineralization, ore deposit types, and their relationship with the distribution of Cu-Au grades. The results of the study can be used as a reference for further exploration. The research is based on core drilling data from six locations, ASD analysis, X-RD, petrography, ore microscopy, and statistical analysis using boxplots. The lithology of the research area consists of six lithological units: sandstone, first-phase dacite, diorite, quartz diorite, second-phase dacite, and phreatomagmatic breccia. There are five alteration zones, the overprint zone (alunite-chlorite-mica-smectite±pyrophyllite±biotite±k-feldspar), the advanced argillic zone (pyrophyllite-mica-dickite-diaspore), the argillic zone (kaolinite-mica±illite±diaspore), the phyllic zone (sericite/mica-smectite±chlorite±calcite), and the propylitic zone (chlorite-mica-smectite±epidote±calcite). The observed mineralization includes pyrite, chalcocite, enargite, and chalcopyrite, occurring in disseminated, massive, and vein forms, present at depths <150 m with Au grades ranging from 0.1 ppm to >1 ppm and Cu grades from <0.1% to 0.5%. The presence of pyrite, chalcopyrite, bornite, and covellite in stockwork is found at depths >150 m with Au grades ranging from 0.5 ppm to >1 ppm and Cu grades from 0.3% to >1%. The Cu-Au grade distribution zone is controlled by quartz diorite intrusions and is associated with argillic and phyllic alteration types. The related mineralization includes bornite-chalcopyrite-pyrite and enargite-chalcocite-pyrite assemblages, with pyrite showing a weak association. The ore deposit type is a porphyry Cu-Au system overprinted by high-sulfidation epithermal mineralization.

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