cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Andri Agus Rahman
Contact Email
jurnal@rmpi.brin.go.id
Phone
+6282120080815
Journal Mail Official
eksplorium@brin.go.id
Editorial Address
Gd. 720, KST BJ Habibie, Kawasan Puspiptek Serpong, Tangerang Selatan 15314
Location
Kota bandung,
Jawa barat
INDONESIA
Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Published by Badan Riset dan Inovasi Nasional
ISSN : 08541418     EISSN : 2503426X     DOI : https://doi.org/10.55981/eksplorium
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Energy Engineering Materials Science & Nanotechnology
EKSPLORIUM is published to deliver the results of studies, research and development in the field of nuclear geology. The manuscripts are the result of study, research and development of nuclear geology with scope: geology, exploration, mining, nuclear minerals processing, safety and environment, and development of nuclear technology for the welfare.
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Geologi
Articles 172 Documents
 2   3   4   5   6 
Pemanfaatan Alumina Waste dari Tailing Bauksit Menjadi Zeolit Adsorben Septiansyah, Sy Indra; Santi, Maya
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.2018.39.2.4982

Abstract

Alumina waste from bauxite tailings is the by products derived from bauxite ore beneficiation. The beneficiation process is done by separating the particles that exist such as mud or clay, roots, grain, bauxite ore ranges from 2 mm are discarded or be referred to as a waste product or tailings. High concentration of alumina and silica in bauxite tailings considered as one of the reasons why these tailings can be used as base material in the making new products, namely synthetic zeolites. Zeolites synthetic is selected because zeolites are imported, expensive and have uniform properties and >150 types of synthetic zeolites can be made commercially and even in industrial zeolite can be used widely as an adsorbent, ion exchange, membranes, catalysts, etc. The chemical analysis of bauxite tailings showed the composition of alumina (Al2O3) is approximately 49.41% silica (SiO2) is about 12.58%, hematite (Fe2O3) is approximately 10.6% and some other inorganic oxides are small amounts. The conversion process bauxite tailings into zeolite is carried out by caustic fusion method to extract the fusion (alumina precursor) followed by the addition of sodium silicate precursor with synthesis formula 1.2Na2O.0.5SiO2.0.5Al2O3.10H2O and crystallization products is carried out by the hydrothermal method at low temperatures with variable incubation period specified. The results showed that the zeolite synthesis of bauxite tailings using caustic fusion and followed by crystallization at low temperature and under atmospheric pressure has succeeded in transforming the product into an amorphous phase to the crystalline phase product zeolite adsorbent.
Geostatistics Application On Uranium Resources Classification: Case Study of Rabau Hulu Sector, Kalan, West Kalimantan Syaeful, Heri; Suharji
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.2018.39.2.4960

Abstract

In resources estimation, geostatistics methods have been widely used with the benefit of additional attribute tools to classify resources category. However, inverse distance weighting (IDW) is the only method used previously for estimating the uranium resources in Indonesia. The IDW method provides no additional attribute that could be used to classify the resources category. The objective of research is to find the best practice on geostatistics application in uranium resource estimation adjusted with geological information and determination of acceptable geostatistics estimation attribute for resources categorization. Geostatistics analysis in Rabau Hulu Sector was started with correlation of the orebody between boreholes. The orebodies in Rabau Hulu Sectors are separated individual domain which further considered has the hard domain. The orebody-15 was selected for further geostatistics analysis due to its wide distribution and penetrated most by borehole. Stages in geostatistics analysis cover downhole composites, basic statistics analysis, outliers determination, variogram analysis, and calculation on the anisotropy ellipsoid. Geostatistics analysis shows the availability of the application for two resources estimation attributes, which are kriging efficiency and kriging variance. Based on technical judgment of the orebody continuity versus the borehole intensity, the kriging efficiency is considered compatible with geological information and could be used as parameter for determination of the resources category.
Estimasi Sumber Daya Uranium Tipe Batupasir di Sektor Aloban, Sibolga, Tapanuli Tengah Ciputra, Roni Cahya; Muhammad, Adi Gunawan; Adimedha, Tyto Baskara; Syaeful, Heri
EKSPLORIUM Vol. 40 No. 1 (2019): MEI 2019
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2019.40.1.5360

Abstract

Uranium explorations in Sibolga Area have been conducted since 1978 by BATAN and successfully result in sandstone-type uranium mineralization. Research related to uranium mineralization concept on sandstone and conglomerate at Aloban Sector, Sibolga has been conducted through 22 boreholes data which resulted in the geological section, anomaly distribution along with radiometry counting and geochemistry data. This research objective is to obtain uranium resources in Aloban Sector by correlating radiometry counting and geochemical data from previous research by using a geostatistic approach. Geostatistical processing using SGeMS software shows a correlation coefficient of 0.5 so that the radiometry and geochemical data are interpreted to have a good correlation. Uranium Resources estimation was measured on Conglomerate I and Sandstone I units which are considered to have thick and wide mineralization distribution. The average uranium grade for Conglomerate I and Sandstone I units are 173.05 ppm U and 161.54 ppm U respectively. Uranium resource estimation at Aloban Sector is 415 tons as inferred resources.
Penentuan Kondisi Optimum Proses Ekstraksi Uranium dan Torium dari Terak II Timah dengan Metode Pelindian Asam Sulfat dan Solvent Extraction Trioctylamine (TOA) Anggraini, Mutia; Nawawi, Fuad Wafa; Widana, Kurnia Setiawan
EKSPLORIUM Vol. 40 No. 1 (2019): MEI 2019
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2019.40.1.5378

Abstract

Tin slag II is a by-product of the second stage of tin smelting. The tin slag II contains high economic value elements in the form of radioactive elements (uranium and thorium) and rare earth elements. These elements can be utilized if they are separated from each other. The process of separating radioactive elements and rare earth elements has been carried out by leaching sulfuric acid method. The results of this process are residue containing rare earth elements and filtrates containing radioactive elements in the form of uranium and thorium sulfate. Research related to the separation of uranium and thorium sulfate in tin slag processing is only slightly published. This paper aims to determine the effectiveness of the uranium and thorium separating process by the solvent extraction method using trioctylamine (TOA). The solvent extraction process is carried out by varying the concentration of TOA used, comparison of the aqueous and organic phase (A/O) and variations in extraction time. In this study, the optimum conditions for the process were obtained at 4% of TOA concentration, 1 : 1 of A/O ratio, and mixing time of aqueous and organic phase for 2 minutes. In this condition, uranium and thorium which extracted were 67% and 0.84% respectively.
Proses Pembentukan dan Asal Material Formasi Kayasa di Halmahera Berdasarkan Unsur Jejak dan Unsur Tanah Jarang Irzon, Ronaldo
EKSPLORIUM Vol. 40 No. 1 (2019): MEI 2019
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2019.40.1.5445

Abstract

The complexity of rock formation on Halmahera Island is influenced by convergences of at least three main plates and is located in the active collision of two arcs. The Kayasa Formation is one of four volcanic rock units on Halmahera Island. Petrographic analysis, rare elements, and rare earth elements (REE) are applied in studying the rock emplacement process and the material source of Kayasa Formation. Bipolar microscopy is utilized in petrographic studies while Inductively Coupled Plasma-Mass Spectrometry is used for measuring the trace and rare earth elements compositions in seven fresh samples and four altered/weathered rocks in Kayasa Formation’s domain. The fresh samples are classified as andesite-basalt based on quartz, K-feldspar, and plagioclase modal composition. Plagioclase fractional crystallization is thought to play an important role in the crystallization of Kayasa Formations. Fresh rocks in this study tend to crystallize under oxidative conditions in the marine environment, whilst altered or weathered ones formed in a reductive environment above sea level. Based on megascopic observations and REE patterns, the material of Kayasa Formation is very likely derived from the ocean plate.
Pendugaan Awal Patahan di Pulau Jawa Menggunakan Anomali Gravitasi dan Riwayat Kegempaan Ryanto, Theo Alvin; Suntoko, Hadi; Setiaji, Abimanyu Bondan Wicaksono
EKSPLORIUM Vol. 40 No. 1 (2019): MEI 2019
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2019.40.1.5470

Abstract

Information related to the fault existences is needed for industrial development planning, mainly on the Nuclear Power Plant (NPP) site planning. This study is aimed to build preliminary prediction on faults existence in Java Island by using free-air gravity and earthquakes history data. The methodologies are separating regional with residual gravity anomalies and then analyzing them by correlating the continuity of their contrast values which have similarities with the distribution of earthquakes epicenters point. Based on the analysis, some lineaments in Java Island are predicted as faults which relatively directing to north-south and west-east.
Pemetaan Geologi dan Identifikasi Sesar Aktif di Lokasi Calon Tapak PLTN Ketapang dan Sekitarnya, Madura Ngadenin, Ngadenin; Subiantoro, Lilik; Widana, Kurnia Setiawan; Sutriyono, Agus; Widito, P.
EKSPLORIUM Vol. 33 No. 1 (2012): MEI 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.1.2835

Abstract

The result of economical study about demand of water supply and electric in Madura Island concludes that in 2016 Madura Island will need nuclear desalination plant to process sea water becomes fresh water. In order to support the installation of nuclear desalination plant, it is required site free from active fault, because active fault is mainly rejection factor criteria on site selection process. Aim of the research is to get geological information and identify of active fault in the site candidate of nuclear desalination plant at Ketapang area and its surrounding by interpretation of aerial photograph and land sat imagery, geological and structure geological mapping as well as trenching. The lithology of Ketapang (Md.01) and Sokobana (Md.02) site candidate consists of reef and chalky limestone forming undulating hills morphology. Structurally, research area forms a monocline with East-West trending axis, plunging 10o to East, the direction of strike is West-East, dip 10o - 30o to North. Geological structure analysis show that research area is free from active fault.
The Last 41.000 Years Fluctuation in Atmosperic CO2 Concentration Inferred from The Changes in Oxygen and Carbon Stable Isotopes Ratios of The Marine Sediment Wahyudi, Wahyudi; Minagawa, Masao
EKSPLORIUM Vol. 33 No. 1 (2012): MEI 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.1.644

Abstract

The past atmospheric CO2 concentrations were reconstructed based on the results of measurements of stable oxygen and carbon isotopic ratios of fossil foraminifer and total organic carbon contained in marine sediment taken from the Okinawa Trough, East China Sea. In this study, we utilized two models of Popp et al and Rau et al. for the reconstruction. The results show that the whole trends of the changes in CO2 concentrations are very similar, even when it is compared to the atmospheric CO2 concentration of air trapped in ice core from southern pole. Changes in atmospheric CO2 concentrations are interpreted as a consequence of fluctuation in ocean surface water utilization of CO2 by marine organism and those are closely related to glacial-interglacial (cold-warm) fluctuations between maximum and minimum values through most Quaternary.
Studi Deposit Monasit dan Zirkon Dalam Batuan Kuarter di Daerah Cerucuk Belitung Soetopo, Bambang; Subiantoro, Lilik; Sularto, Priyo; Haryanto, Dwi
EKSPLORIUM Vol. 33 No. 1 (2012): MEI 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.1.675

Abstract

Geologically the study area lies in the distribution of granite in a single lane of Malaysian tin, Bangka-Billiton, Karimata which is containing monazite mineral monazite.Monazite is one of the radioactive minerals containing uranium (U), thorium (Th), rare earth element (REE) in phosphate bonds. Heavy minerals sample that containing monazite 2.719% has radioactivity value until 3000 c/s. Petrographic analysis of granitic rocks contain minerals monazite 1-2% with radioactivity 200-400 c/s. Based on these considerations, it is necessary to for further research in the development and assessment of prospects for mineral monazite. The Objectives to be achieved isobjective to be achieved is to localize the prospect area distribution of monazite and zircon in the area of ​​100 km2. The results of field studies showed that the presence of monazite contained in the sand, clay as alluvial deposits derived granitic rocks. Indications are reflected in the results of radioactivity measurements of soil / alluvial ranged between 50-375 c/s, measurement of radioactivity of heavy minerals (MB) ranged between 50-150 c/s at some point discovered the location of high radioactivity values ​​ ranged between 250-1000 c/s with background value of 25-150 c/s and dan contains Th (100 – 6.545 ppm) serta contains U (15 – 639,4 ppm). The results show that in the study area indicates that the potential for monazite and zircon area ​​31,680,000 m2.
Digesti Monasit Bangka dengan Asam Sulfat Prassanti, Riesna
EKSPLORIUM Vol. 33 No. 1 (2012): MEI 2012
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2012.33.1.676

Abstract

Technology of Bangka monazite processing with alkaline method has been mastered by PPGN BATAN with the product in the form of RE (Rare Earth) which is contain U < 2 ppm and Th 12 – 16 ppm. Hence, as comparator, the research of Bangka monazite processing with acid method using sulfuric acid has been done. The aim of this research is to obtain the optimal condition of Bangka monazite’s digestion using sulfuric acid so that all elements contained in the monazite that are U, Th, RE, PO4 dissolved as much as possible. The research parameter’s are monazite particle’s size, sulfuric acid consumption (weight ratio of monazite ore : sulfuric acid), digestion temperature, digestion time and consumption of wash water. The results showed that the optimal conditions of digestion are -250+325 mesh of monazite particle’s size, 1 : 2.5 of weight ratio of monazite ore : sulfuric acid, 190°C of digestion temperature, 3 hours of digestion time and 8 times of weight monazite’s feed of wash water with the recovery of digested U = 99.90 %, Th = 99.44 %, RE = 98.64 % dan PO4 = 99.88 %.

Page 4 of 18 | Total Record : 172

 2   3   4   5   6 

Filter by Year

2011 2025


Reset
Filter By Issues
All Issue Vol. 46 No. 1 (2025): MAY 2025 Vol. 45 No. 2 (2024): NOVEMBER 2024 Vol. 45 No. 1 (2024): MAY 2024 Vol. 44 No. 2 (2023): NOVEMBER 2023 Vol. 44 No. 1 (2023): MAY 2023 Vol. 43 No. 2 (2022): NOVEMBER 2022 Vol. 43 No. 1 (2022): MAY 2022 Vol. 42 No. 2 (2021): NOVEMBER 2021 Vol. 42 No. 1 (2021): MEI 2021 Vol. 41 No. 2 (2020): NOVEMBER 2020 Vol. 41 No. 1 (2020): MEI 2020 Vol. 40 No. 2 (2019): NOVEMBER 2019 Vol. 40 No. 1 (2019): MEI 2019 Vol. 39 No. 2 (2018): NOVEMBER 2018 Vol. 39 No. 1 (2018): MEI 2018 Vol. 38 No. 2 (2017): NOVEMBER 2017 Vol. 38 No. 1 (2017): MEI 2017 Vol. 37 No. 2 (2016): NOVEMBER 2016 Vol. 37 No. 1 (2016): MEI 2016 Vol. 36 No. 2 (2015): NOVEMBER 2015 Vol. 36 No. 1 (2015): MEI 2015 Vol. 35 No. 2 (2014): NOVEMBER 2014 Vol. 35 No. 1 (2014): MEI 2014 Vol. 34 No. 2 (2013): NOVEMBER 2013 Vol. 34 No. 1 (2013): MEI 2013 Vol. 33 No. 2 (2012): NOVEMBER 2012 Vol. 33 No. 1 (2012): MEI 2012 Vol. 32 No. 2 (2011): NOVEMBER 2011 Vol. 32 No. 1 (2011): MEI 2011 More Issue