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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 764 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.
PENENTUAN ZONA MINERALISASI LOGAM MENGGUNAKAN INTEGRASI METODE MAGNETIK DAN POLARISASI INDUKSI DENGAN GEOLOGI DI KECAMATAN PRONOJIWO, KABUPATEN LUMAJANG, PROVINSI JAWA TIMUR: METAL MINERALIZATION ZONES DETERMINATION USING INTEGRATION OF MAGNETIC AND INDUCTION POLARIZATION METHODS WITH GEOLOGY IN PRONOJIWO DISTRICT, LUMAJANG REGENCY, EAST JAVA PROVINCE Hillary Inri Mambai; Dzil Mulki Heditama; Edya Putra
Buletin Sumber Daya Geologi Vol 21 No 1 (2026): 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.v21i1.562

Abstract

Research area is located in Pronojiwo District, Lumajang Regency, which is physiographically located in the Sunda-Banda Magmatic Arc, an area with high metal mineralization potential. This study aims to identify and characterize prospective zones of gold (Au) and copper (Cu) mineralization through the integration of magnetic and Induced Polarization (IP) data. Primary data in the form of 410 magnetic measurement points and secondary data in the form of four IP lines (resistivity and chargeability) as well as regional geological data are used for validation and interpretation of mineralization zones through 2D inversion modeling. The processing results show a distribution of magnetic anomalies with values ​​ranging from 0.4 to 8.1 nT/m on the analytic signal map and -325.5 to 577.3 nT on the residual magnetic anomaly map. The integration of magnetic and IP data successfully identified two main prospect zones: Zone A as a potassic alteration zone with high chargeability, intermediate resistivity, and high magnetic susceptibility, indicating the core zone of a porphyry deposit system with potential Cu-Au accumulation and Zone B as a phyllic alteration zone with high chargeability, high resistivity, and low magnetic susceptibility, representing an intermediate alteration zone with disseminated sulfide mineralization. Zone A is the main exploration target because it is located in the center of the porphyry system, while Zone B is not a main target, but helps describe the distribution of alteration and shows how the hydrothermal system develops around the core zone. The integration of magnetic and IP methods is effective in delineating alteration zones and supporting further exploration.
Ni-Fe LATERIZATION TREND AND NICKEL Laterite prospect area determination ON LATERITE DEPOSITS IN LASOLO KEPULAUAN DISTRICT, NORTH KONAWE REGENCY, SOUTHEAST SULAWESI: POLA LATERISASI Ni-Fe DAN PENENTUAN AREA PROSPEK NIKEL LATERIT PADA ENDAPAN LATERIT DI KECAMATAN LASOLO KEPULAUAN, KABUPATEN KONAWE UTARA, SULAWESI TENGGARA Rio Irhan Mais Cendra Jaya; Hasria; Haslan; Deniyatno; La Ode Asrafil; Laode Ihksan Juarsan; Al Firman; Indrawati; La Ode Sahidin; La Ode Andimbara; Alfirman
Buletin Sumber Daya Geologi Vol 21 No 1 (2026): 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.v21i1.521

Abstract

This research was conducted in Lasolo Islands District, North Konawe Regency. This study aims to investigate the pattern of Ni Fe laterization and determine the prospect area of nickel laterite deposits. The method used is the analysis and interpolation of drilling data to determine Ni distribution, ore thickness, stripping ratio, and deposit prospect area. Drilling data are chemical data of several major elements and oxides obtained from XRF analysis, such as Ni, Fe, SiO2, MgO, and Al2O3, and ore thickness data. The laterization pattern show that the laterite nickel deposits at the research site belong to the saprolitic ore type where Ni tends to accumulate in the Saprolite Zone with Ni content higher than the Cut of Grade (COG) value. The results of interpolation and mapping obtained prospect areas are divided into three namely non-prospect areas (Ni <1.5%), areas with moderate enrichment prospects (Ni 1.5 - 1.8%), and areas with high enrichment prospects (Ni > 1.8%).
ANALISIS LABORATORIUM UNTUK KARAKTERISASI MINERAL BIJIH MENGGUNAKAN METODE SEM, XRD, DAN AAS SAMPEL PT. X, DI PULAU SUMBAWA: LABORATORY ANALYSIS FOR CHARACTERIZATION OF ORE MINERALS BASED ON SEM, XRD, AND AAS METHODS SAMPLE PT. X, SUMBAWA ISLAND Nabilah Zaidah Istiqomah; Fiati Nurmaya; Achmad Djumarma Wirakusumah; Ivan Ibrahim; Nurarifah Amalian
Buletin Sumber Daya Geologi Vol 21 No 1 (2026): 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.v21i1.514

Abstract

At the exploration stage, laboratory analysis is needed to ensure the suitability of field exploration results. Laboratory analysis to identify physical and chemical characteristics of minerals that can’t be carried out in the field. This is because for identification requires instruments that only exist in the laboratory. This study aims to determine the type of alteration and mineralization, copper-bearing minerals, liberation degree of copper-bearing minerals, and determine the efficient measure of liberation degree for the highest concentrate of PT samples. X which amounts to two samples. The methods used are SEM (Scanning Electron Microscope) analysis using AMICS software and XRD (X-Ray Diffraction) analysis using Topas software. In addition, for data validation of SEM (Scanning Electron Microscope) analysis using AMICS software and XRD (X-Ray Diffraction) analysis using Topas software. In addition, for data validation of SEM analysis results using AAS. Copper-bearing minerals was chalcopyrite and covellite. Ore impurity minerals in the form of quartz, pyrite, alunite, kaolinite, pyrophilite, hematite, orthoclase, albit, chlorite, muscovite, rutile, diaspor, goethite, and chromite. The samples came from the alteration and mineralization zone of the philic type. The highest copper content was at -38 μm, which was 1.71% Cu in sample number ID.12 and 3.06% Cu in sample number ID.13. The minerals chalcopyrite and covyelite, under locking conditions, are dominant with quartz, alunite, and pyrite. The highest degree of liberation of chalcopyrite minerals (well liberated) was found in samples measuring -38 μm and -106 +53 μm, and the highest degree of liberation of colossal minerals (well liberated) in samples measuring -53 + 38 μm and -106 +53 μm. Keywords: Alteration, Copper Mineral, Locking Mineral, Liberation Degree, SEM.
KARAKTERISTIK ALTERASI DAN MINERALISASI ENDAPAN EPITERMAL  SULFIDASI TINGGI DI DAERAH BAKAN, KABUPATEN BOLAANG MONGONDOW, PROVINSI SULAWESI UTARA: CHARACTERISTICS ALTERATION AND MINERALIZATION OF HIGH SULPHIDATION EPITHERMAL DEPOSITS IN BAKAN AREA, BOLAANG MONGONDOW REGENCY, NORTH SULAWESI PROVINCE Farrel Gibran Hafizha Khansa; Aton Patonah; Cecep Yandri Sunarie; Devito Pradipta
Buletin Sumber Daya Geologi Vol 21 No 2 (2026): 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.v21i2.520

Abstract

The Bakan area, Bolaang Mongondow Regency, North Sulawesi Province is one of the regions with gold deposit potential in Indonesia. This study aims to identify the characteristics, alteration, and mineralization in the research area through field observations, petrography, mineralography, analytical spectral devices, fire assay (FA), and Atomic Absorption Spectrophotometry (AAS). Based on the alteration mineral assemblage, the research area is divided into five alteration zones: quartz (vuggy) + alunite, quartz (massive) + alunite, alunite + dickite + kaolinite + quartz, illite + montmorillonite, and chlorite + epidote. The mineralization in the research area consists of oxide and sulfide minerals. Oxide minerals include goethite hematite and jarosite. Sulfide minerals include pyrite, sphalerite, galena, chalcopyrite, and covellite. Integrating all data, the type of hydrothermal deposit in the research area is an epithermal high-sulfide deposit with the precious metal mineralization potential zone located in the central area of the research region. The mineralization zone is associated with the massive silica and vuggy silica alteration zones, which are dominantly controlled by structures oriented Northeast - Southwest. 
KONTROL STRUKTUR GEOLOGI TERHADAP ALTERASI DAN MINERALISASI BIJIH DAERAH HARGOSARI, KECAMATAN TIRTOMOYO, KABUPATEN WONOGIRI, PROVINSI JAWA TENGAH: STRUCTURAL CONTROLS ON ALTERATION AND ORE MINERALIZATION IN THE HARGOSARI AREA, TIRTOMOYO DISTRICT, WONOGIRI REGENCY, CENTRAL JAVA PROVINCE Andi Faesal; Wahyu Hermansyah; Aji Syailendra Ubaidillah; Z.A Munarfan Putra; Iwan Dermawan; Khatib Syarbini; Heni Pujiastuti; Melinda Dwi Erintina; Dwi Winarti; Arief Rachman Hakim; Aryaumul Patriani
Buletin Sumber Daya Geologi Vol 21 No 1 (2026): 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.v21i1.547

Abstract

This study evaluates the influence of geological structures on hydrothermal alteration and ore mineralization processes in the Hargosari area, Tirtomoyo District, Wonogiri Regency, Central Java. Detailed field mapping over an area of ±3 km², petrographic analysis, and structural interpretation using the Riedel shear model identify a principal mineralized zone extending approximately 1.2 km with a dominant orientation of N60°E. Mineralization is primarily controlled by strike-slip fault systems, consisting of dextral NW–SE and sinistral SW–NE faults that served as major conduits for hydrothermal fluid migration. These fluids produced quartz vein fragments and sulfide mineral assemblages dominated by pyrite, galena, sphalerite, and chalcopyrite. Secondary structures, including extensional fractures and en-echelon tension veins, developed within a transpressional regime, providing additional permeability pathways for mineralizing fluids. The Kayulawang Fault is interpreted as a pre- to syn-mineralization structure, while younger fractures represent post-mineralization deformation. Propylitic and argillic alteration zones envelop basaltic-andesitic lava bodies, reflecting multistage fluid–rock interactions associated with Plio–Pleistocene tectonic evolution. These findings underscore the critical role of strike-slip fault configuration and regional tectonic dynamics in controlling ore distribution and alteration patterns within volcanic-arc environments, offering important implications for regional mineral exploration strategies.
A PARSIMONIOUS APROACH FOR SUBSURFACE TEMPERATURE ESTIMATION BASED ON MAGNETOTELLURIC (MT) DATA FROM WAE SANO GEOTHERMAL FIELD: PENDEKATAN PARSIMONI UNTUK ESTIMASI TEMPERATUR BAWAH PERMUKAAN BERDASARKAN DATA MAGNETOTELLURIK (MT) DARI LAPANGAN GEOTERMAL WAE SANO Iqbal Takodama; Tony Rahadinata; Hendra Grandis
Buletin Sumber Daya Geologi Vol 21 No 1 (2026): 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.v21i1.594

Abstract

Metode magnetotelurik (MT) secara umum digunakan dalam eksplorasi geotermal untuk mendelineasi zona konduktif yang sering diinterpretasikan sebagai lapisan penudung. Namun, zona konduktif tidak selalu mencerminkan keberadaan temperatur tinggi sehingga berpotensi menimbulkan ambiguitas dalam interpretasi. Makalah ini membahas pendekatan parsimoni berbasis persamaan Arrhenius untuk memperkirakan gradien temperatur bawah-permukaan dari gradien resistivitas, hasil analisis resistivitas-semu dan transformasi Bostick. Metode ini diterapkan pada 102 titik MT di lapangan Wae Sano, NTT dan dikalibrasi dengan data log temperatur pada dua sumur landaian suhu. Hasilnya menunjukkan korelasi linier yang kuat (R² = 0,996) dengan nilai RMSE ~8%. Model temperatur memperlihatkan kubah isotermal ~225°C pada kedalaman 500 - 750 m di sektor tenggara Danau Sano Nggoang yang diinterpretasikan sebagai zona upflow dari sistem geotermal. Pendekatan ini efektif sebagai metode assesmen cepat untuk delineasi awal prospek geotermal serta mendukung optimalisasi desain survei MT pada tahap eksplorasi awal.

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