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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. 15 No. 3 (2020): Buletin Sumber Daya Geologi" : 5 Documents clear
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.
POLA ALIRAN PANAS BERDASARKAN ANALISIS FLUIDA DAN MINERAL UBAHAN DI DAERAH PANAS BUMI SORIK MARAPI, KABUPATEN MANDAILING NATAL, PROVINSI SUMATRA UTARA: HEAT FLOW PATTERN BASED ON ANALYSIS OF GEOTHERMAL FLUID AND ALTERATION MINERAL IN SORIK MARAPI REGION, MANDAILING NATAL DISTRICT, NORTH SUMATRA PROVINCE Azizi, Hisyam Azhar; Agus Didit Haryanto; Johanes Hutabarat; Dicky Muslim; Dewi Gentana; Ryan Hidayat
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.v15i3.309

Abstract

Sorik Marapi geothermal area in Mandailing Natal Regency, North Sumatra Province has a high-temperature geothermal system that is interpreted from the chemical characteristics of hot springs. The presence of alteration minerals such as epidot in exploration well cutting samples strengthens the estimated reservoir temperature reaches 235⁰C. The presence of hot water are more acidic hot spring around fumaroles and the minerals obtained from the drill well reflect the upflow zone while the hot spring group of neutral chloride water in the north with lower elevation reflects the outflow zone of the geothermal system here. This is a characteristic of hot fluid flow that occurs in geothermal areas of volcanic systems with steep terrain as well as Sorik Marapi area.
KARAKTERISTIK BATUBARA TERPENGARUH INTRUSI DI TAMBANG AIR LAYA, SUMATRA SELATAN DAN POTENSINYA SEBAGAI MATERIAL UNTUK PEMBUATAN GRAFIT SINTETIS: THE CHARACTERISTICS OF HEAT-AFFECTED COAL IN AIR LAYA MINE, SOUTH SUMATRA AND ITS POTENTIAL AS AN ALTERNATIVE SOURCE OF SYNTHETIC GRAPHITE Arsha Maulana; Ferian Anggara
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.v15i3.310

Abstract

Graphite can be applied in various uses for example as a heat resistant materials, batteries, and electrodes. Graphite material can be obtained from synthetic graphite which produced from anthracite coal that is heated at 2000ºC or above. Naturally heat affected coal can be found in Tambang Air Laya (TAL), Tanjung Enim, South Sumatra where the coal is affected by the presence of igneous intrusion. According to these conditions, it is important to conduct the research to determine the characteristics of heat affected coal and its potential as an alternative source of synthetic graphite. Four samples of heat affected coal obtained from four seams with varying distances to the body of igneous intrusion are prepared for several analyses, namely petrographic, random vitrinite reflectance (Rvr), proximate, X-Ray Diffractometry (XRD), Total Carbon (TC), Total Organic Carbon (TOC), and Total Inorganic Carbon (TIC), as well as micro-Raman spectroscopy. The heat affected coal shows the tendency of increasing vitrinite reflectance and fixed carbon content and decreasing moisture and volatile matter towards the igneous intrusion body. The heat affected coal (A1 Coal) with the closest distance to the igneous intrusion body has the highest rank (low volatile bituminous coal; %Ro= 2,01%) and mineral percentage. A1 Coal is associated with mineral lempung such as illite, smectite, and rektorit that can increase the degree of crystalinity in the process of coalification and that would catalyze the formation of synthetic graphite in the next process.

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