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All Journal Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Adhika Junara Karunianto
Pusat Pengembangan Geologi Nuklir-BATAN Jl. Lebak Bulus Raya No. 9, Pasar Jumat, Jakarta 12440
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Environmental Science Materials Science & Nanotechnology Social Sciences

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Interpretasi Deposit Uranium Berdasarkan Data Tahanan Jenis dan Polarisasi Terinduksi di Sektor Rabau Hulu, Kalan, Kalimantan Barat Haryanto, Dwi; Supriyanto, Supriyanto; Soetopo, Bambang; Karunianto, Adhika Junara
Eksplorium Buletin Pusat Teknologi Bahan Galian Nuklir Vol 36, No 2 (2015): November 2015
Publisher : Pusat Teknologi Bahan Galian Nuklir - BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (30.019 KB)

Abstract

Daerah Rabau Hulu, Kalan, Kalimantan Barat merupakan daerah potensial uranium yang telah dieksplorasi secara detil dengan berbagai metode. Metode tahanan jenis dan polarisasi terinduksi dapat diterapkan dalam eksplorasi deposit uranium yang mineralisasinya berasosiasi dengan mineral sulfida. Pengolahan, analisis, dan interpretasi data tahanan jenis dan polarisasi terinduksi dilakukan untuk dapat mengidentifikasi sebaran deposit uranium dan litologi batuan di daerah penelitian. Deposit uranium di daerah Rabau Hulu pada umumnya berasosiasi dengan sulfida, turmalin, dan terdapat dalam batuan favourable. Indikasi mineralisasi uranium dijumpai dalam bentuk-bentuk tidak teratur dan tidak merata yang terdiri atas mineral uraninit, pirit, kalkopirit, pirhotit, molibdenit, dan ilmenit. Pengambilan data menggunakan konfigurasi dipole-dipole pada area sekitar 36 hektare, terdiri atas 46 lintasan dengan panjang + 425 m. Pengambilan data polarisasi terinduksi dalam kawasan frekuensi dengan titik dan lintasan yang sama dengan data tahanan jenis. Pengolahan data menghasilkan nilai tahanan jenis dan faktor logam yang selanjutnya dibuat penampang 2 dimensi. Penentuan nilai tahanan jenis dan polarisasi terinduksi dilakukan dengan mengkorelasi data sumur bor dengan hasil pengolahan data. Tahanan jenis pada zona deposit uranium bernilai kurang dari 2.000 Ωm dan nilai faktor logamnya lebih besar dari 90 mho/m. Zona deposit uranium ini semakin meluas seiring dengan kedalaman. Distribusi deposit uranium berarah barat daya–timur laut dan berbentuk lensa. Kata kunci: deposit uranium, tahanan jenis, polarisasi terinduksi, Rabau Hulu
Identification of the Aquifer Occurrences in Sungai Raya and Its Surroundings, Bengkayang, West Kalimantan Cakrabuana, Wira; Fauzi, Rachman; Karunianto, Adhika Junara; Muhammad, Adi Gunawan; Widodo, Widodo
Jurnal Lingkungan dan Bencana Geologi Vol 13, No 3 (2022)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v13i3.417

Abstract

A hydrogeological study was carried out in Sungai Raya Village, Bengkayang Regency, West Kalimantan Province. The objectives of the study were to identify the occurrences of the aquifer in Sungai Raya, along with its type, depth, distribution, and quality. The methods used in this study were literature studies of geological data and geoelectrical measurement. Based on the literature study, it was known that the study area, from the oldest to the youngest, consists of andesite, granodiorite, diorite, quartz sand deposit, littoral deposit, and alluvial deposit. Based on the geoelectrical measurement, it resulted that most of the subsurface layers recorded by the instrument are alluvial deposit (characterized by their low-resistivity value) which is underlaid by the bodies of igneous rocks, i.e. diorite and andesite (characterized by its high-resistivity value). Based on the comprehensive analysis, there are two aquifers in the study area, they are alluvial deposit and quartz sand deposit. Both of them are unconfined aquifers. The aquifers can be found at the surface to the depth of ±100 m. It can be inferred that the aquifers relatively deepen to the north and east. The quartz sand deposit is a better aquifer since it has better sorting and more-open fabric than the alluvial deposit which provides the deposit a larger capacity for storing and transmitting groundwater.
Penentuan Anomali Gayaberat Regional dan Residual Menggunakan Filter Gaussian Daerah Mamuju Sulawesi Barat Karunianto, Adhika Junara; Haryanto, Dwi; Hikmatullah, Fajar; Laesanpura, Agus
EKSPLORIUM Vol. 38 No. 2 (2017): NOVEMBER 2017
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2017.38.2.3921

Abstract

Gravity method is a geophysical method that has been frequently used in prospecting mineral resources. The parameter of searched object is based on variations of gravity acceleration measurements on the surface due to variations in sub-surface geological changes. Research area is located in Mamuju Area of West Sulawesi Province where tectonically a complex geological region, which is at a meeting of three large plates, the Pacific plate, the Indo-Australian plate and the Eurasian plate and the smaller Philippine plate. In addition, Mamuju is an area with a high radioactivity dose rate that has potency to radioactive minerals resources. The purpose of the research is to obtain gravity anomalies by using qualitative separation and interpretation of regional and residual gravity anomalies. Complete Bouguer Anomaly (CBA) value of the research area obtained from the measurements was 46.0 – 115.7 mGal. Based on the CBA map, the separation process of regional gravity anomalies and residual using Gaussian filtering technique conducted. This filtering technique works based on spectral analysis of gravity amplitude changes in spatial where the result is a cutoff wave number of 1.1736 x 10-3/meter and a wavelength of 5373.45 m. The regional and residual gravity anomalies range from 51.8 to 102 mGal and -10.4 to 14.8 mGal respectively. The depth of influence of each anomaly is calculated based on their spectral wavelengths, resulting 970.97 m and 100.21 m for regional and residual anomalies respectively. There are five zones based on the residual anomaly map, which are zones A, B, C, D and E. The heaviest positive gravity anomaly is found in zone A and B, which is predicted to be influenced by Adang lava with relative north – south distribution.
Studi Keterdapatan Torium Pada Endapan Laterit Bauksit di Pulau Singkep Dalam Rangka Pengembangan Eksplorasi Torium di Wilayah Granit Jalur Timah Ngadenin; Widana, Kurnia Setiawan; Karunianto, Adhika Junara
EKSPLORIUM Vol. 39 No. 1 (2018): MEI 2018
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2018.39.1.4258

Abstract

The thorium exploration in the last five years in the granite tin belt region is targeted at thorium availability in primary and secondary tin deposits. Singkep island is the part of granite tin belt which potential for thorium occurences either primer or secondary deposits. The purpose of this study was to determine the characteristics of thorium availability in bauxite laterite deposits concerning thorium content and its relation to the availability of radioactive minerals and cerium (Ce), lanthanum (La), Yttrium (Y), and zircon (Zr) contents on the bauxite laterite deposit. The data obtained from this study will be used as an evaluation material for the development of thorium exploration in bauxite laterite deposits in Indonesia. The methods used are geological mapping, thorium concentration measurements, and sampling of pan concentrate for mineral grain analysis and analysis of Ce, La, Y, and Zr contens. The lithology of the study area was granite that had weathered and turned into bauxite laterite deposit with thorium content ranging from 25.9 to 177.8 ppm eTh. The concentrate of the repeating result is zircon-ilmenite concentrate with radioactive mineral content composed of zircon, monazite, and anatase. La concentration on zircon-ilmenite concentrate is 0–412 ppm, Ce is 0–80 ppm, Y is 27–82 ppm and zircon is 9,420–100,000 ppm. Avaibility of thorium at the bauxite laterite deposit on Singkep Island is closely related to the zircon, monazite, and anatase minerals. Characteristics of thorium availability in the bauxite laterite deposit are similar to the thorium characteristics of the primary and secondary tin deposits.
Interpretasi Bawah Permukaan Berdasarkan Distribusi Nilai Tahanan Jenis di Daerah Puspiptek, Serpong Karunianto, Adhika Junara; Haryanto, Dwi; Syaeful, Heri
EKSPLORIUM Vol. 39 No. 2 (2018): NOVEMBER 2018
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2018.39.2.4968

Abstract

The area of Center for Research in Science and Technology (PUSPIPTEK) Serpong is 460 hectares wide. Most of the area is a Green Open Spaces (RTH). In the line with the growth of research activities, the need for infrastructure and building facilities also increases. As a national strategic facility, it is necessary to design buildings that are sturdy for and suitable with subsurface conditions. Geolectrical survey can be used to determine of subsurface condition/information. The purpose of this study is to obtain the ilustration of subsurface, based on the distribution of geoelectric resistivity values in the site of Experimental Power Reactor (RDE) construction. The resistivity data acquisition is using a multichannel resistivitymeter MAE X612EM+ type in 2-D by 48 channel of Wenner-Schlumberger configuration. The numbers of elctrodes used are 48 with an electrode interval of 5 m. Based on 2-D inversion model, there are four section models obtained, namely line-1, line 2, line-3, and line-4. The data error for each section is relatively small, less than 12%. Geological interpretation carried out in the section line-2 and line-3 illustrates the existence of layers A, B, and C. Layer A is interpreted as rock with silt to clay grain size containing organic material with resistivity values range 2-20 ohm-m and thickness varries in 1-7 m. Layer B is interpreted as sandstone which has a range of resistivity values from 10-90 ohm-m with thickness variations 5-20 m. Layer C is interpreted as claystone which has a range of resistivity values from 2-5000 ohm-m with depth variation in 10-20 m.
Penentuan Daerah Prospek Logam Tanah Jarang di Pulau Singkep Ngadenin; Karunianto, Adhika Junara; Indrastomo, Frederikus Dian
EKSPLORIUM Vol. 41 No. 1 (2020): MEI 2020
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2020.41.1.5853

Abstract

Rare earth elements (REE) are strategic material used in high-tech and clean energy devices. In Indonesia, REE contained in monazite, zircon, and xenotime minerals as accessories minerals in tin mining located in the granite tin belt of Riau Islands to Bangka Belitung. Singkep is one of the potential areas of REE because its location is in the granite tin belt. The goal of the study is to determine the REE prospects in Singkep Island. The method used by taking 25 pan concentrated samples on some tailing ex tin mining on the Singkep island. These samples were taken from each rock formation on Singkep Island in sequence from older to younger rocks formation, respectively. They are Permian Carboniferous of Bukit Duabelas quartzites, Permian Carboniferous of Persing Metamorphic Rocks, Triassic Muncung granite, Jurassic Tanjungbuku granite, Holocene swamps deposits and alluvium. Each sample of pan concentrated is divided into two parts for REE content and grain mineral analysis. All 25 samples were analyzed for REE content, while only 14 samples for the grain mineral. The results of REE content and grain mineral analysis indicate that the REE prospect area located in the tailings ex tin mining in the rock formation of the Muncung granite area. The highest concentration of lanthanum reached 20100 ppm, cerium 37100 ppm, yttrium 9872 ppm, and neodymium 2840 ppm in monazite, zircon, and allanite.
Analisis Kedalaman Potensi Akuifer Air Tanah dengan Pemodelan Distribusi Tahanan Jenis secara Inversi 2-D Desa Kompas Raya, Nanga Pinoh, Melawi, Kalimantan Barat Karunianto, Adhika Junara
EKSPLORIUM Vol. 34 No. 1 (2013): MEI 2013
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2013.34.1.633

Abstract

Geophysical investigation by geoelectrical resistivity method have been done at Kompas Raya Village, Pinoh, Melawi, West Kalimantan Province. Kompas Raya Village is an area that is always a lack of water in the dry season, so the villagers are always difficult to get clean water to meet their daily needs. This study aimed to look resistivity distribution both laterally and vertically in two dimensions. The data distribution of resistivity can be used as a basis to determine the potential aquifers in the area of research. The measurement method of sounding resistivity is performed by Schlumberger Configuration. The numbers of measuring points are 30 points soundings which are divided into six survey paths each where each survey path is contained five measuring points. In this study, resistivity data processing is performed using 2D inversion modeling techniques based on data resistivity sounding. The results obtained from this study is the presence of two layers of relatively low resistivity that is each less than 30 Ohm.m and 20 Ohm.m. The first layer is interpreted as a shallow aquifer (aquifer-1) with the depth of about 20 m to 30 m, while the second layer is interpreted as the aquifer (aquifer-2) with the depth of about 90 m to 100 m.
Pelacakan Air Tanah di Desa Mbuit Kabupaten Manggarai Barat, Provinsi Nusa Tenggara Timur Suharji, Suharji; Nurdin, Muhammad; Karunianto, Adhika Junara; Sartapa, Sartapa; Sudarto, Slamet
EKSPLORIUM Vol. 34 No. 2 (2013): NOVEMBER 2013
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2013.34.2.2808

Abstract

West Manggarai Regency is a new regency as a result of regional development of Manggarai-Raya Regency. Based on information from the local mining service authorities dealing with groundwater, Mbuit village undergo clean water shortages in the dry season. One alternative to overcome the water shortages is the use of groundwater. The investigation of groundwater is intended to determine the characteristics of the geology, hydrogeology and characteristics of the electrical properties of the subsurface rocks which required to determine the potential rock layers that containing groundwater (aquifers). To achieve these objectives carried out the topography measurement, collecting data of geological/hydrogeology, and electrical resistivity measurement. Based on result of observations, analysis of the surface geological survey and supported by subsurface resistivity data in the investigation area, the potential aquifer is found. The aquifers potential has been found in a fractured aquifer system, in the northern of investigation region and distributed relatively west-east. The best aquifer is found in the line C at the point C15–C17, line G at the point G17–G18 (Humpung village), line D at the point D14–D17, line E at the point E14–E19 (Tureng village) with a resistivity value of 5–43 Wm and the depth of 50–120 meters.
Karakterisasi Hidrogeologi Daerah Sekitar Tapak PLTN di Bengkayang, Kalimantan Barat Muhammad, Adi Gunawan; Fauzi, Rachman; Karunianto, Adhika Junara; Cakrabuana, Wira; Widodo
EKSPLORIUM Vol. 42 No. 2 (2021): NOVEMBER 2021
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2021.42.2.6479

Abstract

Site evaluation is an important phase of site selection for commercial-scale nuclear power plants (NPP) in Indonesia. Geotechnical and radioactive material dispersion aspects are some of the aspects which are assessed in site evaluation under provisions of laws and regulations. To support those aspect evaluations, it is necessary to conduct hydrogeological characterization in the vicinity of the NPP site. The purpose of this study is to determine the hydrogeological characteristic of the vicinity of the NPP site in Bengkayang Regency, West Kalimantan Province based on geological and geophysical aspects. The methods of this study consist of geomorphological mapping, geological mapping, hydrogeological mapping, geoelectric measurement, and integrated analysis. The study area consists of three morphological units: alluvial plain, isolated hills, and coastal plain. Stratigraphically, the lithology units of the study area, from the oldest to the youngest, consist of andesite, granodiorite, diorite, quartz sand deposits, coastal deposits, and alluvial deposits. The geophysical measurement used is the geoelectric method which is conducted at 12 electrode arrays with 470 m length and spacing of 10 m. In the geoelectrical section, it can be seen that several anomalies can be interpreted as the fractured body of igneous rocks or the diorite intrusion in andesite. These anomaly values are ranged from 300 Wm to >8000 Wm. The relatively low resistivity values (<30 Wm) are interpreted as water saturated-alluvial deposits that could have a thickness of ±100 m. There are three hydrogeological units in the study area: aquifers in which flow is intergranular with high permeability, aquifers in which flow is intergranular with moderate permeability, and aquifug of local importance. Generally, the groundwater in the study area flows from SSW to NNE.
Interpretasi Deposit Uranium Berdasarkan Data Tahanan Jenis dan Polarisasi Terinduksi di Sektor Rabau Hulu Haryanto, Dwi; Supriyanto, Supriyanto; Soetopo, Bambang; Karunianto, Adhika Junara
EKSPLORIUM Vol. 36 No. 2 (2015): NOVEMBER 2015
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2015.36.2.2774

Abstract

Rabau Hulu area, Kalan, Kalimantan Barat is a potential area of uranium that has been explored in detail by various methods. Methods of resistivity and induced polarization can be applied in the exploration of uranium deposits in which its mineralization associated with sulphide minerals. Processing, analysis, and interpretation of resistivity and induced polarization data conducted in order to identify the distribution of uranium deposits and lithology of the rocks in the study area. Uranium deposits in the area Rabau Hulu is generally associated with sulphides, tourmaline and contained in favorable rocks. Symptoms of uranium mineralization encountered in other forms of irregular and uneven consists of uraninite, pyrite, chalcopyrite, pyrrhotite, molybdenite, and ilmenite minerals. Data acquisition using dipole-dipole configuration in an area of ​​approximately 36 hectares, 46 lines along + 425 m. Acquisition of induced polarization frequency domain data which the same points and lines with resistivity data. Data processing produces resistivity and metal factor values and subsequently made two-dimensional section. Determination of resistivity and induced polarization are done by correlated boreholes data with the results of data processing. Resistivity of uranium deposits zone worth less than 2,000 Ωm and the value of metal factor greater than 90 mho/m. Uranium deposit zone is expanding along with the depth. Uranium deposits distribution trending Southwestern-Northeast and shaped lens.
Co-Authors Adi Gunawan Muhammad Bambang Soetopo Cakrabuana, Wira Dwi Haryanto Fauzi, Rachman Frederikus Dian Indrastomo, Frederikus Dian Heri Syaeful Hikmatullah, Fajar Kurnia Setiawan Widana Laesanpura, Agus Muhammad Nurdin Ngadenin Ngadenin Ngadenin Rakhma, Ersina Sartapa Sartapa, Sartapa Slamet Sudarto, Slamet Suharji Suharji Supriyanto Supriyanto Widodo Widodo Widodo