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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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PENENTUAN UMUR ABSOLUT BATUAN KUBAH LAVA ANDESIT DAERAH PANAS BUMI LEJJA-KABUPATEN SOPPENG, PROVINSI SULAWESI SELATAN MENGGUNAKAN METODE THERMOLUMINESCENCE (TL): DETERMINATION OF ABSOLUTE AGE LAVA DOME ANDESITE ROCK AT GEOTHERMAL LEJJA AREA, SOPPENG DISTRICT, SOUTH SULAWESI PROVINCE BY THERMOLUMINESCENCE (TL) METHOD Risdianto, Dikdik; Sukaesih, Sukaesih; Nurdin, Nizar Muhamad; Situmorang, Stephen; Haryanto, Agus Didit
Buletin Sumber Daya Geologi Vol. 15 No. 1 (2020): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (895.767 KB) | DOI: 10.47599/bsdg.v15i1.294

Abstract

Thermoluminescence (TL) has now been applied as a dating method for rock age. In geothermal exploration information about the age of rocks / volcanic material is very important to reconstruct the geological history related to thermal activity. Determination of the estimated age of rocks as a source of heat in the Lejja Geothermal prospect in Soppeng Regency, South Sulawesi Province used the TL method. The measurement procedure used with additive doses on quartz crystal grains. Measurement of dose by irradiation is done twice, at doses of 10 Gray (Gy) and 30 Gy while for annual dose is determined by analyzing the concentration of Uranium, Thorium, and Potassium using the X-ray fluorescence of method XRF.Two trend line is made to determine both minimum and maximum linear equation. Natural TL intensity shows 14380 arbitrary unit (a.u) and 14430 a.u as the minimum and maximum peak. Irradiated sample with 10 Gy dose shows peak at 1883–1947 a.u, and 30 Gy dose shows peak at 2733-2763 a.u. Regression trend line made by artificial dose show that natural TL intensity equivalent with 304.05-315.96 Gy. Calculation of uranium, thorium, potassium, water content, and beta factor produce annual dose in the amount of 0.5408 Gy. Through TL method, it is known that the absolute age of heat source at soppeng is 573 ± 11 kilo age years old.
PEMODELAN INVERSI 2-D MENGGUNAKAN DATA MAGNETOTELLURIK DAERAH PANAS BUMI WAY SELABUNG, KABUPATEN OGAN KOMERING ULU SELATAN, PROVINSI SUMATERA SELATAN: 2-D INVERSION MODELING USING MAGNETOTELLURIC DATA AT WAY SELABUNG GEOTHERMAL AREA, SOUTH OGAN KOMERING ULU REGENCY, SOUTH SUMATERA PROVINCE ilmi, irpan; Syafri, Ildrem; Haryanto, Agus Didit; Zarkasyi, Ahmad
Buletin Sumber Daya Geologi Vol. 15 No. 1 (2020): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1749.738 KB) | DOI: 10.47599/bsdg.v15i1.296

Abstract

One of the physical properties of rocks that can be used to analyze a geothermal system is the resistivity of rock. Magnetotelluric method is one method that can be used to determine the resistivity of rock. MT measurements are carried out at 30 measuring points with north-south directed paths and the distance between measuring points is around 2000 meters. This research aims to do 2-D inversion modeling in determining location, delineation, and depth of the geothermal potential of Way Selabung. Based on the results of MT data analysis and 2-D inversion modeling, the Way Selabung geothermal system is in the graben structure zone. The manifestation of Way Selabung, Lubuk Suban and Selabung Damping hot water manifestations is formed due to intersection of Way Selabung, Kotadalam and Akarjangkang faults in a hydrogeological pattern in the outflow zone. 2-D modeling results show the top there is a group of low resistivity value <10 Ohm.m with a thickness of about 1500 meters from the surface which is interpreted as caprock. At the bottom there is a group of resistivity values of around 30-100 Ohm.m with a depth of 1500 meters to 1750 meters which is interpreted as a reservoir zone.
PENGARUH KANDUNGAN ABU DAN ZAT TERBANG TERHADAP MAKSIMUM FLUIDITAS BATUBARA FORMASI TANJUNG DI DAERAH SEKAKO, KALIMANTAN TENGAH: THE INFLUENCE OF ASH AND VOLATILE MATTER CONTENTS ON MAXIMUM FLUIDITY OF TANJUNG FORMATION COAL IN SEKAKO AREA, CENTRAL KALIMANTAN PROVINCE Wiranata, Beny; Amijaya, Hendra; Anggara, Ferian; Tanggara, Deddy N.S.P.
Buletin Sumber Daya Geologi Vol. 15 No. 2 (2020): 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.v15i2.242

Abstract

High to low volatile bituminous coals of Tanjung Formation in Central Kalimantan Province is known to be potentially used as a metallurgical or coking coal. Coal maximum fluidity is one important parameter which is strongly connected to the quality of the coke produced. This study aims to determine the relationship between coal maximum fluidity and its volatile matter and ash content. Four coal from A seam and 6 coal from B seam of Tanjung Formation in Sekako area were sampled using a ply by ply channel sampling method. Samples are dominated by bright coal and banded bright coals lithotype. All coal samples are subjected to proximate and Gieseler plastometer analysis in the laboratory. The coal samples Laboratory results show that coal in the study area have ash content ranging from 2,79 to 9,05 (wt%, adb), volatile matter contents varies from 35,14 to 39,50 (wt%, adb) and coals maximum fluidity varies from 22263 to 49029 (ddpm). Further data evaluation indicates that in the study area, coal ash content are negatively correlated (r= -0.656, R2= 0.431) and had no significant effect on the maximum of coal fluidity (r = -0,656, R2 = -0,431 and sig. 0,055 > 0,05). On the other hand, coal volatile matter are positively correlated (r = 0.794; R2 = 0.6301) and had a significant effect (sig. 0.003 <0.05) on the maximum fluidity of coal. The increase of ash content causes the decrease of coal maximum fluidity, whereas the increase of coal volatile matter causes the increase of coal maximum fluidity. The correlation of volatile matter content and coal maximum fluidity can be expressed by an equation of y = 6327,9x - 200248.
KARAKTERISTIK ZONASI BATUAN RESERVOAR BERDASARKAN PETROGRAFI, SERBUK BOR, UJI TEKANAN DAN TEMPERATUR DI LAPANGAN PANAS BUMI SOKORIA, KABUPATEN ENDE, PROVINSI NUSA TENGGARA TIMUR: RESERVOIR CHARACTERISTICS BASED ON PETROGRAPHY, CUTTING, PRESSURE AND TEMPERATURE TEST IN SOKORIA GEOTHERMAL FIELD, ENDE REGENCY, NUSA TENGGARA TIMUR PROVINCE Purbiyantoro, Aldila Jasmine; Agus Didit Haryanto; Euis Tintin Yuningsih; Haris Siagian
Buletin Sumber Daya Geologi Vol. 15 No. 2 (2020): 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.v15i2.291

Abstract

Sokoria Geothermal Field is located at Sokoria Village, Ende Regency, Nusa Tenggara Timur Province. Petrographic analysis and Methylene Blue test (MeB) were carried out to estimate the illite-smectite ratio and occurence of other alteration minerals as indicator for cap rock, transition and reservoir zones. Pressure and temperature test (P&T test) was also performed to determine those zonation. The result concludes the geothermal caprock zone is distributed from the surface to the dept of 700 mVD (meter vertical depth), indicated by medium to high MeB index (20 – 80%), as smectite characteristic temperature up to 100°C. The transition zone is located from the depth of 700 mVD to 1100 mVD, with low MeB index (6 – 20%), as illite and illite–smectite characteristic and well temperature up to 200°C. Reservoir zone is located at 1100 mVD, indicated by very low MeB index (<10%),as characteristic of illite, with first appearance of epidote in well W-1 at 1119 mMD (meter measured depth) and well W–2 at 1338 mMD. P&T test shows reservoir temperature reached 250°C.
POTENSI KANDUNGAN UNSUR KIMIA EKONOMIS PADA LARUTAN PANAS BUMI DENGAN STUDI KASUS DI PLTP DIENG, KABUPATEN WONOSOBO DAN KABUPATEN BANJARNEGARA, PROVINSI JAWA TENGAH: THE POTENTIAL CONTENT OF ECONOMIC CHEMICALS ELEMENT IN GEOTHERMAL SOLUTIONS WITH A CASE STUDY IN THE DIENG GEOTHERMAL POWER PLANT, WONOSOBO REGENCY AND BANJARNEGARA REGENCY, CENTRAL JAVA PROVINCE Sabtanto Joko Suprapto; Suparno; Umi Yuliatin
Buletin Sumber Daya Geologi Vol. 15 No. 2 (2020): 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.v15i2.299

Abstract

The Geothermal fluid has a very high content of dissolved elements. Geochemical methods are used to determine the potential indication of dissolved economic elements. Geothermal exploration has been carried out throughout Indonesia, mainly by the Geological Agency. The exploration result in the existence of hot spring data by analyzing SiO2, Al, Fe, Ca, Mg, Na, K, Li, As, NH4, B, F, Cl, SO4, HCO3, and CO2. Base on the secondary data of 256 locations of hot spring in Indonesia that were statistically analyzed, an overview of the association of economic elements and impurities elements is obtained. Dieng Geothermal Power Plant with that has recuring problem of silica scale formation, becomes an interesting object as a case study of the potential of dissolved economic elements. The increase in dissolved content in geothermal fluids apart from naturally occurring, is triggered even more strongly by the geothermal power plant operating system, which changes the liquid phase to the vapor phase, hence the remaining liquid phase more concentrated. The potential content of economic chemical elements is determined by discharge measuring of the remaining liquid phase produced and the results of the analysis of the element concentration dissolved. The results of geochemical data clustering of hot springs obtained four elemental association, the association of SiO2-F, Al-Fe-SO4, Ca-Mg-Cl-Na-K, and Li-B-HCO3. Dissolved lithium content is high in several geothermal areas in Indonesia, found in hot springs with chloride type fluids. The brine produced from the reservoir at the Dieng Geothermal Power Plant is from a meteoric type fluid that has intensively reacted with the surrounding rock and a magmatic type fluid. The remaining brine that is from several separators and comes out through the silencer, at the Dieng Geothermal Power Plant has a total discharge of 457.1 m3/hour, contains high levels of several elements, lithium 77.31-99.4 mg/l, silica 1109.25-1220.9 mg/l, boron 404.16-589.4 mg/l, potassium 2532.2-4536.5 mg/l, and manganese 5.49-15.82 mg/l.
KONTROL STRUKTUR GEOLOGI PADA ALTERASI DAN MINERALISASI DI DAERAH CIBALIUNG, KABUPATEN PANDEGLANG, PROVINSI BANTEN: CONTROL OF GEOLOGICAL STRUCTURE ON ALTERATION AND MINERALIZATION IN CIBALIUNG AREA, PANDEGLANG REGENCY, BANTEN PROVINCE Bari, Abdul; Fatimah Rosana, Mega; Haryanto, Iyan
Buletin Sumber Daya Geologi Vol. 15 No. 2 (2020): 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.v15i2.301

Abstract

Cibaliung is located in the Honje Igneous Complex, which is a Miocene volcanic complex, having two economically mineable quartz veins, i.e. Cikoneng and Cibitung veins. These veins have been mined and produced by PT Cibaliung Sumber Daya - subsidiary of PT Aneka Tambang Tbk. In the production process, the veins have reached the maximum limit. Therefore, a new reserve must significantly be discovered. The research methodology includes observation of geological structures with topographic lineament analysis, circular feature, river lineament analysis using Digital Elevation Model, and measurement of brecciation structure, shear fracture and gash fracture. The results of field data interpretation from 328 observation locations with 8,114 geological structure data both for shear fracture and gash fracture show that the presence of geological structures is directly proportional to the intensity of alteration and mineralization. From the structural and fault movement analysis and the correlation with mineralization and alteration data, there can be delineated 14 prospect areas, namely the Cikoneng-Cibitung, Cibengang, Rorah Kadal, Cikeni, Ramada, Mastar, Muara Cikeni, Cipatat, Ciburial, Cikamancing, Sompok Uara, North Batulawang, Cikarae-Cingenge, and Ciparay Prospects. From these prospects, it is recommended to conduct further exploration on six prospects, namely Cibengang, Ramada, West Cikoneng, Cikamancing, North Sompok and the North Batulawang Prospects.
KARAKTERISASI DAN ESTIMASI SUMBER DAYA GAMBUT SEBAGAI MATERIAL ADSORBEN LOGAM BERAT DALAM LARUTANDI BLOK TELUK MERANTI, KABUPATEN PELALAWAN, PROVINSI RIAU: CHARACTERIZATION AND RESOURCES ESTIMATION OF PEAT DEPOSIT AS HEAVY METAL ADSORBENT IN SOLUTIONAT TELUK MERANTI BLOCK, PELALAWAN REGENCY, RIAU PROVINCE Muhammad Arief Pinandita; Galuh Yuliani; Agus Subarnas; Denni Widhiyatna; Maryono; Siska Mutiara
Buletin Sumber Daya Geologi Vol. 15 No. 2 (2020): 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.v15i2.302

Abstract

Indonesia has the largest peat area in the tropical zone, which represents 70% of the peat area in Southeast Asia and 50% of the world's tropical peatlands. At present, the utilization of peat is still relatively low and its likelihood to cause major fires during dry season is still of great concern in Indonesia. On the other hand, peat has potential to be used as natural adsorbent. This study aims to characterize the adsorptive properties of peat and to estimate its possibleresources as natural heavy metal adsorbent in the Teluk Meranti Block. Peat characterization was carried out by selecting three peat samples, namely PL-13, PL-21 and PL-26 based on elemental analyses. The characterization of BET surface area showed that PL-13, PL-21, and PL-26 have maximum area of 241,73 m2/g, 241,80 m2/g dan 247,29 m2/g, respectively. The adsorption test results show that PL-13, PL-21, and PL-26 have maximum capacity of 15.06; 11.99; and 22.93 mg/g, with adsorption efficiencies of 46.79%; 48.36%; and 46.85%, respectively. Based on Government Regulation No. 57 of 2016, peat with a thickness of three meters or more is determined as protection function of the peat ecosystem. Accordingly, the inferred resources of peat deposits that can be utilized as adsorbent is estimated to be 90,477,890 tonnes.
KARAKTERISTIK ALTERASI DAN TEKSTUR URAT KUARSA PADA PIT BARANI, CEBAKAN EMAS MARTABE, KABUPATEN TAPANULI SELATAN, PROVINSI SUMATRA UTARA: ALTERATION AND QUARTZ-VEIN TEXTURES CHARACTERISTIC AT BARANI PIT OF MARTABE GOLD DEPOSITS, SOUTH TAPANULI REGENCY, NORTH SUMATRA PROVINCE Nada Salsabila Deva; Yuningsih, Euis Tintin; Fachrudin, Kurnia Arfiansyah; Saala, Nur Afrianti; Triyunita, Ade
Buletin Sumber Daya Geologi Vol. 15 No. 3 (2020): 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.v15i3.303

Abstract

Barani Pit is part of the PT Agincourt Resources Contract of Work, located in Aek Pining Village, Batangtoru District, South Tapanuli Regency, North Sumatra. The Barani Pit is an open pit mine, with epithermal deposit type in the form of veins which host for more concentration of metal elements. This study aims to find out the alteration characteristics and texture variations of quartz veins that are abundant in the Barani Pit area and to identify the texture of quartz veins carrying economic mineralization. The pit mapping method is used to get samples, and alteration mineral identification using analytical spectral devices (ASD), as well as geochemical analysis to determine grade content of Au, Ag, and Cu elements. The results showed that the developing alteration zone consisted of argillic (kaolinite+illite+ smectite), advanced argillic (quartz+kaolinite+dickite), and silicification (quartz+chalcedony+ kaolinite). Quartz textures of the veins that developed in the study area consisted of massive quartz, crustiform, crustiform-colloform, brecciated, bladed, and saccharoidal. The texture of mineralization bearing veins with high grade gold content were crustiform-colloform, banded, followed by massive quartz oxide, and lattice bladed. These veins are associated with kaolinite + dickite clay minerals, moderate to high oxidation states, and are associated with grey sulphides containing high grade up to Au 76.65 ppm and Ag 34 ppm.
IDENTIFIKASI ZONA MINERALISASI BIJIH BESI MENGGUNAKAN METODE POLARISASI TERINDUKSI DI DAERAH ULUSULITI DAN TANJUNG LIMA KAPAS, SOLOK SELATAN, SUMATRA BARAT: IDENTIFICATION OF IRON ORE MINERALIZATION ZONE USING INDUCED POLARIZATION METHOD AT ULUSULITI AND TANJUNG LIMA KAPAS AREA, SOUTHERN SOLOK, WEST SUMATRA Bodjawati, Maharani Sarastika; Heditama, Dzil Mulki; Muttaqin, Yudi Aziz
Buletin Sumber Daya Geologi Vol. 15 No. 3 (2020): 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.v15i3.307

Abstract

The Ulusuliti and Tanjung Lima Kapas area, Koto Parik Gadang Diateh District, South Solok Regency, West Sumatra Province has a potential of iron ore form mineralization zone which is formed from the limestone formation intruded by granodiorite. Induced polarization method measurement was carried out in time domain using a dipole-dipole configuration with a space between the electrodes of 50 m. Induced polarization data was measured as many as 11 lines with a length of each line of 1.200 m and a distance between the line of 100 m to 300 m. 2D modeling was carried out to produce resistivity and chargeability sections of each line. 3D modeling was carried out to identify the distribution of the iron ore mineralization zone in the study area, both vertical and horizontal. In the 2D resistivity and chargeability model, the zone of iron ore mineralization is estimated to have a resistivity value > 500 ohm.m and a chargeability > 150 miliseconds. These values are might be iron ore minerals as a result of hydrothermal alteration formed due to the interaction between magmatic and meteoric fluids originating from granodiorite rock interacts with limestone. The result of the 3D modeling shows the continuity of the mineralized zone in a relatively southwest-northeast direction with a volume of 864.000 m3.
PEMODELAN GEOLOGI DAN ESTIMASI SUMBER DAYA BATUBARA DI PIT “HMG”, TAMBANG BATUBARA BANKO BARAT, SUMATRA SELATAN: GEOLOGICAL MODELLING AND COAL RESOURCE ESTIMATION IN THE “HMG” PIT, WEST BANKO COAL MINE, SOUTH SUMATRA Adithya Ramadhani Hasibuan; Juniarto, Reinaldi; Nurdrajat; Reza Mohammad Ganjar Gani; Dicky Muslim; M. Dwiki Satrio
Buletin Sumber Daya Geologi Vol. 15 No. 3 (2020): 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.v15i3.308

Abstract

Indonesia is a country that has a lot of coal deposits, and one of the largest deposits is in Sumatra Island. The Bukit Asam coal mine has had a long history beginning with the Dutch colonial period. Administratively, location of the studied area is located in the area of Bukit Asam coal mine, Tanjung Enim area, Muara Enim Regency, South Sumatra Province. This paper provides the 2D and 3D geological modelling to estimate coal resources in the “HMG” PIT of West Banko Coal Mine. Forty-eight exploratory drill holes data from PT Bukit Asam were used in this study. There were reanalysed and reinterpreted to identify coal characteristics, correlate coal seams, and compile to create subsurface geological models. In an effort to determine coal resources in this area, there were some analytical techniques (criteria or parameter), including geological complexity analysis, coal quality distribution analysis, subsurface mapping to observe the geometry of coal seam distribution and making geological models from the results of drilling activities. The studied objects are seams A1, A2, B1, B2, and C with rank of high volatile B bituminous based on the ASTM Classification. The coal seams distribution shows relatively southeast-northwest trends. Resources classification or estimation in this paper is based on SNI 5015 : 2011, in which the study area is included in the geological complexity of simple geological groups with the distance of inferred resource information 1,000<X≤ 1,500m, designated 500<X≤1,000m, and measured X≤500m. From geological modelling and the Circular Method, estimated coal seam A1 resource is 28,543,893 tons, A2 seam is 31,199,799 tons, seam B1 is 38,638,462 tons, seam B2 is 15,790,222 tons, and seam C is 40,913,153 tons. The total coal resources are 155,085,529 tons.

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