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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 751 Documents
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DELINEASI NILAI RESISTIVITAS DI LAPANGAN PANAS BUMI TAMBANG SAWAH MENGGUNAKAN METODE MAGNETOTELLURIK Andre Rahmat Al Ansory; Hana Raihana; Vinki Loverly Pritama; Welly Saputri; Faritz Bagda Maghribi; Muchammad Farid; Arif Ismul Hadi; Halauddin; Budi Harlianto; Nanang Sugianto
Buletin Sumber Daya Geologi Vol. 18 No. 3 (2023): 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.v18i3.386

Abstract

The subsurface structure of the geothermal field in Desa Tambang Sawah has been mapped. This research aims to delineate the resistivity values in the area of Tambang Sawah Village, Lebong Regency, Bengkulu Province based on magnetotelluric measurements which can later identify low, medium, and high resistivity values to interpret geothermal in the research area. The magnetotelluric (MT) method with electrical and magnetic sensors is used to collect data in the field. There are two electrical sensors in horizontal direction (Ex, Ey) and three magnetic sensors in horizontal direction. (Hx, Hy) and vertical (Hz). The results obtained from this study are that resistivity values of 20-50 ohm.m are considered as reservoirs, while resistivity of 0.26-0.8 ohm.m is considered as caprock, and resistivity greater than 300 ohm.m is considered as hot rock.
SUMBER DAYA DAN KARAKTERISTIK ENDAPAN PASIR BESI DI CIHERAS, KABUPATEN TASIKMALAYA: RESOURCES AND CHARACTERISTICS OF IRON SAND DEPOSITS IN CIHERAS, TASIKMALAYA DISTRICT Teuku Ishlah; Suwahyadi; Dwi Nugroho Sunuhadi
Buletin Sumber Daya Geologi Vol. 18 No. 3 (2023): 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.v18i3.402

Abstract

Iron is a metal commodity that is widely used in human civilization, and is now used as a raw material for making steel and a mixture of raw materials for cement. Therefore, research activities on iron sand deposits are still needed, especially in ex-mining areas that are interesting for re-examination, because increase of metal price, so decrease the cut off grade for iron sand concentrate mining and the possibility of the presence of other high value minerals. The research location is located in Ciheras Village, Cipatujah District, including Block Ciheras-1, Block Ciheras-2, and Block Cikalong, Cikadu Village, Cikalong District, Tasikmalaya Regency, West Java Province. The aim of this research is to determine the availability, quality and estimation of inferred resources for iron sand deposits. The research used geological mapping methods, and sampling using a hand auger at a distance of 400 meters between drilling points in the direction of the base line and 40 meters in the direction of the cross line. A total of 71 points were drilled to a depth of between 2.0 meters to 4.0 meters and samples of iron sand were taken for laboratory analysis including specific gravity (BJ), magnetic percentage (MD), sieve/grain fraction analysis, grain mineralogy analysis, XRF , AAS, and colorimetry. The calculation results for the iron sand resources of the Ciheras-1 Block are 257,138 tonnes, the Ciheras-2 Block is 512,199 tonnes, and the Cikalong Block is 491,970 tonnes, bringing the total to 1,261,308 tonnes. Average percentage of magnetism in the Ciheras-1 Block; 24.02%, Ciheras-2 Block; 14.7%, and Cikalong Block; 8.01%. These iron sand deposits come from rocks and ash from volcanic eruptions which are transported by river water to estuaries and deposited on beaches. High economic value elements in the form of Titanium and Vanadium in beach sand deposits in the research area whose levels and occurrence are comparable to the element Fe.
ANALISIS SEBARAN LOGAM TANAH JARANG UNTUK PENGEMBANGAN WILAYAH PERTAMBANGAN MENGGUNAKAN CITRA LANDSAT-9 DI KABUPATEN BANGKA SELATAN: ANALYSIS OF RARE EARTH METAL DISTRIBUTION FOR MINING AREA DEVELOPMENT USING LANDSAT-9 IMAGES IN SOUTH BANGKA REGENCY Sulka Wijaya; Mega Rosana Fatimah; Euis Tintin Yuningsih; Armin Tampubolon
Buletin Sumber Daya Geologi Vol. 18 No. 2 (2023): 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.v18i2.409

Abstract

The development of high technology currently relies heavily on rare earth elements (REE), some of which are obtained from tin ore mining. The largest production of tin ore is located in the Bangka Belitung Islands. To assess this potential further, this research aims to provide direction for development. The focus of this research centers on Monazite, which has the potential to be processed into rare earth elements, currently in high demand across various global industries and expected to see increasing demand. Monazite is a by-product of tin ore processing. Tin mining in Bangka Island, in general, and South Bangka Regency, in particular, has a long history dating back to the Dutch occupation period and continues to the present day. Geologically, the presence of Triassic-age granite is associated with tin formation, stretching from the Peninsula of Thailand-Malaysia-Riau Islands to Bangka-Belitung and West Kalimantan, known as the Granite Tin Belt. This is indicated by the presence of associated minerals such as Monazite, Xenotime, and zircon, which play a strategic role as REE sources. Regions abundant in mineral resources require proper regional planning to ensure optimal management and utilization. This study refers to the research results conducted by the Coal and Geothermal Mineral Resources Center (PSDMBP) in 2009, 2014, and 2018, which were compared with Landsat-9 images. The purpose of this research is to identify potential areas suitable for developing the Rare Earth Elements (REE) mining industry in South Bangka. The research methodology employs qualitative descriptive analysis and spatial analysis. The analysis results indicate the suitability of spatial utilization for mining activities in Rindik Village and Keposang Village, confirmed through on-site sampling to substantiate their potential. The presence of Monazite in over 50% of the total tailings samples suggests that the area can be developed into a Mining Business Area for REE commodities
DERAJAT LATERITISASI DAN PENGAYAAN UNSUR FE-NI-CO PADA BATUAN HARSBURGIT DI PULAU SEBUKU, KALIMANTAN SELATAN: DEGREE OF LATERITIZATION AND ENRICHMENT OF FE-NI-CO ELEMENTS IN HARSBURGITE ROCKS ON SEBUKU ISLAND, SOUTH KALIMANTAN Fasya Zahra Fauziyyah Ramdani; Ayumi Hana Putri Ramadhani; Andhi Cahyadi; Ernowo; Wahyu Widodo
Buletin Sumber Daya Geologi Vol. 18 No. 3 (2023): 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.v18i3.411

Abstract

The tropical climate in Indonesia causes a high level of chemical weathering or lateritization of ultramafic rocks which results in the enrichment of economic elements such as Fe, Ni and Co. These elements accumulate in the limonite and saprolite zones. This research was conducted on Sebuku Island which composed of ultramafic rocks, especially harzburgite. This study aims to determine the effect of the degree of lateritization in the limonite, saprolite and bedrock zones on the enrichment of economic elements. A number of 95 samples collected from 9 drill holes and analyzed using XRF to determine the main elements and economic elements. The degree of lateritization is calculated from the SiO2 content divided by the total accumulation of SiO2, Al2O3 and Fe2O3 resulting the S/SAF index which describes the intensity of the chemical reaction. The lowest value of the S/SAF index indicates a higher degree of lateritization. Each limonite, saprolite and bedrock zone has S/SAF index values ​​ranging from 0.16 to 58 (strong lateritization), 0.27 to 0.85 (medium lateritization-kaolinization) and 0.77 to 1.24 (mother rock). The zone with a strong degree of lateritization contains Fe levels between 36% to 51%, Ni 0.80% to 1.38% and Co 0.07% to 1.17%. The bedrock contains 4.86% to 7.99% Fe, 0.20% to 1.76% Ni and 0.005% to 0.015% Co. The degree of lateritization in the limonite zone is higher than the saprolite and bedrock zones. This is caused by the decomposition of silica minerals to form the iron and aluminum oxide-hydroxide bearing minerals. The degree of lateritization has a positive correlation with the enrichment of Fe and Co. However, the distribution of high Ni not correlated with the index of lateritization.
MINERALOGI BIJIH DAN KORELASI ANTARA UNSUR Au DENGAN UNSUR Ag, Cu, Pb, DAN Zn PADA SAMPEL PARITAN UJI PIT X PT NUSA HALMAHERA MINERALS, KABUPATEN HALMAHERA UTARA, PROVINSI MALUKU UTARA: ORE MINERALOGY AND CORRELATION BETWEEN THE ELEMENT OF Au WITH ELEMENTS OF Ag, Cu, Pb, AND Zn IN TRENCH’S SAMPLE OF PIT X PT NUSA HALMAHERA MINERALS, NORTH HALMAHERA REGENCY, NORTH MALUKU PROVINCE Nurrezeki Amaliah Dulfi; Dharma Irwanda; Tatik Handayani; Suwahyadi
Buletin Sumber Daya Geologi Vol. 18 No. 2 (2023): 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.v18i2.416

Abstract

The identification of deposits and mineralogical characteristics of ores is necessary to assist further exploration development activities. Research in the Pit X test trench area was conducted to determine the type of epithermal deposits based on the deposite form, ore mineral texture, alteration, sulfide minerals, and gangue minerals that are dominantly found from the results of direct megascopic sample descriptions in the Pit X test trench area, mineragraphic analysis, and petrographic analysis. Deposite forms encountered are vein, stockwork, and dissemenited. Ore mineral textures encountered are banded, comb, dogteeth, moss, vuggy and massive. Alterations encountered are silicification and silica-clay. Sulfide minerals found are pyrite and sphalerite. Gangue minerals found are quartz, sericite, and hematite. Based on the results of the deposite form, ore mineral texture, alteration, sulfide minerals, and gangue minerals found, the Pit X test trench research area is included in the low sulfide epithermal deposit type at a depth of about 300-350 m below the surface, deposited above the boiling zone. In this study, additional data processing was carried out regarding the correlation between Au and Ag, Cu, Pb, and Zn using the results of their grade values to determine the relationship between Au and each of the other four elements. The correlation coefficient (R) was obtained between Au-Ag = 0.158429795, Au-Cu = 0.01, Au-Pb = 0.1923538, and Au-Zn = 0.0565685425. Based on these results, it shows that the correlation of Au with Ag, Cu, Pb, and Zn is very low which may be due to the presence of all samples from the same elevation
REKOMENDASI AREA LOKASI TAPAK SUMUR EKSPLORASI PANAS BUMI MENGGUNAKAN PEMODELAN SISTEM INFORMASI GEOGRAFIS DI DAERAH PROSPEK CISOLOK-CISUKARAME, SUKABUMI, JAWA BARAT: RECCOMENDATION FOR GEOTHERMAL EXPLORATION WELLPAD AREA USING GEOGRAPHIC INFORMATION SYSTEM MODELING IN CISOLOK-CISUKARAME PROSPECT, SUKABUMI, WEST JAVA Husin Setia Nugraha; Dadan Wildan; Rina Wahyuningsih; Reynold Tampubolon
Buletin Sumber Daya Geologi Vol. 18 No. 3 (2023): 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.v18i3.420

Abstract

The use of Geographic Information System (GIS) modelling in developing geothermal resources has been widely carried out, from the initial survey and exploration to exploitation or production stages. This GIS modelling aims to delineate specific locations that are considered to have geothermal resources or are suitable for geothermal field production facilities. This study aims to obtain a map of the recommended wellpad area for the optimal geothermal exploration well drilling location by considering technical and non-technical parameters. This research was conducted in the Cisolok-Cisukarame geothermal prospect area in Sukabumi Regency, West Java Province. The map is produced by integrating eight parameters that will affect the amount of drilling costs: prospect area, slope, reservoir crest depth area, geological structure, water source, access road, settlement area, surface manifestation area, and cultural heritage area. In the early stages, buffer areas and classifications were made for these parameters with a specific range of values based on several considerations. Furthermore, spatial data integration is carried out using vector overlaying boolean operations. The result is a map of the wellpad recommendation area for geothermal exploration wells in the Cisolok-Cisukarame area, with an area of approximately 6.31 km2 (19.62% of the P90 prospect area). Using a 120-meter fishnet produces eight large cluster areas and five small cluster areas, which are suitable for wellpad of standard hole. Meanwhile, the 50-meter fishnet produces the same number of clusters and five other smaller clusters. The results of this study can be used as recommendations for areas to be used as well as footprint locations and planning for further field survey activities such as geotechnical and infrastructure surveys.
KARAKTERISTIK ENDAPAN BIJIH BESI LATERIT PADA BLOK BARAT DAN BLOK TIMUR PT SILO, KABUPATEN KOTABARU, KALIMANTAN SELATAN BERDASARKAN ANALISIS GEOKIMIA DAN MINERALOGI : CHARACTERISTICS OF LATERITE IRON ORE DEPOSIT IN WEST BLOCK AND EAST BLOCK OF PT SILO, KOTABARU DISTRICT, SOUTH KALIMANTAN BASED ON GEOCHEMICAL AND MINERALOGICAL ANALYSIS Ayumi Hana Putri Ramadhani; Andi Cahyadi; Tatik Handayani; Suwahyadi
Buletin Sumber Daya Geologi Vol. 18 No. 3 (2023): 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.v18i3.425

Abstract

This research was conducted to identify the characteristics of laterite deposits in the western and eastern blocks of Sebuku Island, Kotabaru Regency, South Kalimantan using field observation methods, and laboratory analysis including titration, XRF, XRD and petrography analysis. The characteristics of the western block laterite deposits are 10 meters until 15 meters deep. The red limonite zone has Fe content of 51.25% with a mineral composition of hematite, magnetite, goethite, ilmenite, spinel. The yellow limonite zone has Fe content of 50.1% with a mineral composition of goethite, hematite, gibsite, ilmenite. The saprolite zone has Fe content of 16.2%, the mineral composition is hematite, chrysotile, goethite, garnet, diopside. The characteristics of the eastern block laterite deposits are that they have a depth of 6 meters until 7.5 meters. The red limonite zone has Fe content of 47.38% with a mineral composition of hematite, goethite, ilmenite, spinel. The yellow limonite zone has Fe content of 38.70% with a mineral composition of goethite, hematite, chromite, gibbsite, spinel. The saprolite zone has Fe content of 15.08%, the mineral composition is hematite, goethite, diopside, fayalite. The bedrock of the research area is in the form of periodotite, namely dunite and harzburgite which have been serpentinized. The mineral composition of the bedrock is olivine, pyroxene, opaque minerals and several secondary minerals, namely serpentine and talc. The west block bedrock has Fe content of around 7.73 % until 8.03% while the east block bedrock has Fe content of around 6.59 % until 7.49%.
EVALUASI KELAYAKAN PROYEK DAN PERANKINGAN AREA PROSPEK PANAS BUMI KANDIDAT LOKASI PROGRAM GOVERNMENT DRILLING: EVALUATION OF FEASIBILITY AND RANKING OF GEOTHERMAL PROSPECT AREA CANDIDATES FOR GOVERNMENT DRILLING PROGRAM LOCATIONS Nugraha, Husin Setia; Wildan, Dadan; Rina Wahyuningsih
Buletin Sumber Daya Geologi Vol 19 No 2 (2024): 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.v19i2.431

Abstract

Government drilling is a geothermal exploration well drilling program carried out by the government. For planning, it is necessary to rank candidate prospect areas to be included in the program. This study ranked twenty candidate drilling sites using the incremental internal rate of return or incremental IRR method from discounted cash flow (DCF) calculations. The stages for the method are calculating project value and feasibility based on profitability parameters in each prospect area and calculating and ranking based on incremental IRR. As a result, based on the value of the profitability parameter, only two candidate areas for the program are feasible based on the project's IRR and NPV values, namely Nage and Mount Galunggung. Meanwhile, based on the BCR value, in addition to those two locations, two prospect areas are categorized as feasible, namely Bittuang and Mount Papandayan. Thus, Nage and Mount Galunggung are financially viable, and Bittuang and Mount Papandayan are economically viable. Improving the financial viability of Bittuang and Gunung Papandayan requires other fiscal incentives. For ranking, the results based on incremental IRR calculations and IRR result in the same order for the top four or the viable projects. The same results are because of their homogeneous project type, which is a geothermal project. Based on the results of this study, it is recommended to re-evaluate candidate prospect area locations for the program. It is because out of twenty candidate locations, only two are financially viable, and four are economically viable. Choosing the right location is one of the keys to the success of this program.
ANALISIS ALTERASI DAN MINERALISASI BERDASARKAN PENGAMATAN MEGASKOPIK DAN MIKROSKOPIK PADA DAERAH PROSPEK X KABUPATEN BOLAANG MONGONDOW, SULAWESI UTARA: ALTERATION AND MINERALIZATION ANALYSIS BASED ON OBSERVATION OF MEGASCOPIC AND MICROSCOPIC ON PROSPECT "X" IN BOLAANG MONGONDOW REGENCY AT NORTH SULAWESI Christi, Gita Dela; Sulistiyono, Sulistiyono; Handayani, Tatik; Widhiyatna, Denni
Buletin Sumber Daya Geologi Vol 19 No 1 (2024): 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.v19i1.436

Abstract

The North Arm of Sulawesi Island is a gold-rich metallogenic belt. The study area is located in Bakan Village, Bolaang Mongondow Regency, North Sulawesi in the IUP area of PT J Resources Bolaang Mongondow. Exploration to obtain new prospect areas is still being carried out. Therefore, research on alteration and mineralisation characteristics is expected to be a reference for the discovery of new prospects. The research was conducted by identifying surface and subsurface data megascopically and microscopically. Microscopic observations with petrography and mineragraphy. To obtain surface data, alteration observations, channel sampling and grab sampling were carried out, while subsurface data were obtained from core drilling. The purpose of the study was to determine the alteration, mineralisation, oxidation, and deposits type. The study area has lithologies of hydrothermal breccia, diatreme breccia, fault breccia, and tuff breccia. Alteration developed in the form of vuggy sillica, massive sillica, advanced argillic, and argillic. Mineralisation includes gold and silver and sulphide minerals such as pyrite, chalcopyrite, sphalerite, enargite, covellite, and oxide minerals such as goethite, jarosite and hematite. The epithermal high sulphidation deposit type was formed at medium depth, with oxide-type ore.
STUDI GEOLOGI DAN LITOFASIES UNTUK MENENTUKAN KUALITAS BATUGAMPING SEBAGAI BAHAN BAKU SEMEN PADA PT CEMINDO GEMILANG (DESA LEBAK TIPAR, KECAMATAN CILOGRANG, KABUPATEN LEBAK, PROVINSI BANTEN): GEOLOGY AND LITHOFACIES STUDIES TO DETERMINE THE QUALITY OF LIMESTONE AS A RAW MATERIAL FOR CEMENT AT PT CEMINDO GEMILANG (LEBAK TIPAR VILLAGE, CILOGRANG DISTRICT, LEBAK REGENCY, BANTEN PROVINCE) Ardi Darmawan, Muh. Nanda; Rinal Khaidar Ali; Wahyu Budhi Khorniawan
Buletin Sumber Daya Geologi Vol 19 No 1 (2024): 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.v19i1.446

Abstract

Cement factory PT. Cemindo Gemilang which is located in Lebak city, has done many exploration activities which in this area also has the potential for limestone resources. Basically, the research area has a quite large potential for limestone and never been mined before. Therefore this research can help to determine the geological condition in the research area including geomorphology, lithology, and geological structure as well as determining prospect zones regarding the distribution of good quality according on modeling's results which can later be done for mining activities. The research location is in Lebak Tipar Village, Cilograng District, Lebak City, Banten Province. The methods used are geological mapping, petrographic analysis, and geochemical analysis and the modeling is done based on the Inverse Distance Weghting (IDW)Method. The results of the research show that the research area is composed of four lithologies from the youngest to the oldest are sandstone, limestone, mudstone(Citarate Formation) and mudstone(Cijengkol Formation) with a developed structure whic is shown with the indications of broken fractures. Based on the petrographic analysis that has been done, the research area is divided into four lithofacies, namely wackestone, packstone, and grainstone which show good quality with high CaO levels of around >50%, while the mudstone lithofacies has poor quality because it has low CaO levels of around <50%. Based on analysis of surface and subsurface samples, it shows that in the research area the good quality limestone is predominantly in the central to western part of the plot while the poor quality limestone is found in the eastern part of the plot.

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