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 bogor,
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 176 Documents
 12   13   14   15   16 
Ekstraksi Pemisahan Neodimium dari Samarium, Itrium dan Praseodimium Memakai Tri Butil Fosfat Purwani, Maria Veronica; Suyanti, Suyanti
EKSPLORIUM Vol. 38 No. 1 (2017): MEI 2017
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2017.38.1.3035

Abstract

The extraction of Nd(OH)3 (neodymium hydroxide) concentrate containing Y (yttrium), Sm (samarium) and Pr (praseodymium) as product of monazite processed has been done. The purpose of this study is to determine the separation of Nd from Y, Pr and Nd Sm in Nd concentrate. The aqueous phase was concentrated Nd (OH)3 in HNO3 and extractant while organic phase was Tri Butyl Phosphate (TBP) in kerosene. Parameters studied were pH and concentration feed, concentration of TBP in kerosene, extraction time and stirring speed. The result showed that the optimization of separation extraction neodymium from samarium, yttrium and praseodymium in Nd(OH)3 concentrated with TBP, obtained the optimum condition of pH = 0.2, concentration of feed 100 g /L, concentration of TBP in kerosene 5%, extraction time 15 minutes and stirring speed 150 rpm. With the conditions, Separation Factor (SF) obtained for Nd-Y, Nd-Pr, Nd-Sm are 2.242, 4.811, 4.002 respectively, while D and extraction efficiency of Nd are 0.236 and 19.07%.
Interpretasi Lingkungan Pengendapan Formasi Batuan Menggunakan Analisis Elektrofasies di Lokasi Tapak Puspiptek Serpong Syaeful, Heri; Muhammad, Adi Gunawan
EKSPLORIUM Vol. 38 No. 1 (2017): MEI 2017
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2017.38.1.3538

Abstract

The activity of subsurface material composing site foundation characterization is part of nuclear installation siting study. Characterization conducted by several methods, such as understanding the depositional environment of rock formations. As a segment of depositional environment interpretation method, facies model analysis based on electrofacies provides quicker information on depositional system of rock formation. Methodology applied is gamma ray log (log GR) interpretation using relative correlation between log shape variation and sedimentation facies. Based on the analysis, Bojongmanik Formation was deposited on marine-lagoonal environment with very low wave influence. Log GR that shows shape of funnel, serrated, and symmetry, indicate shoreface, lagoon, and tidal point bar facies. The direction of sedimentation, basin, and supply of Bojongmanik Formation interpreted relatively to the north. Serpong Formation deposited on meandering river system, and composed of point bar deposit, crevasse splay, and floodplain deposit. The result of analysis is expected to be guidance in further analysis related to the characterization of foundation materials.
Studi Interaksi Air Tanah Dangkal dan Air Sungai di Sepanjang Daerah Aliran Kali Garang Semarang Menggunakan Isotop Stabil δ18O dan δ2H Andhihutomo, Rismah Taufik; Satrio, Satrio; Prasetio, Rasi; Wijatna, Agus Budhie
EKSPLORIUM Vol. 38 No. 1 (2017): MEI 2017
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2017.38.1.3247

Abstract

A study related to shallow groundwater interaction with Kali Garang River water in Semarang, Central Java using stable isotopes of 18O and 2H has been conducted. As much as 16 groundwater and 3 river water samples were taken for stable isotopes d18O and d2H analysis using Liquid water isotope analyzer LGR DLT-100. The results of analysis shows that there are two area of water recharge origin: the first area contains d18O isotope ranging between -9.41 ‰ to -8.5 ‰ and d2H between -58.2 ‰ to -51.6 ‰; the second area contains isotopes of d18O and d2H -7.15 and -41.55 ‰, respectively. Thus, these results indicate that the first water samples originate from a higher elevation than the origin of the second water sample, but both of them have no interrelation with river water. Whereas, other groundwater samples show that the sample (R4) has interrelation (i.e. mixing) with the river water and two other samples (L1 and R1) have interrelation with salty water or seawater.
Pola Tahanan Jenis dan Konduktivitas Batuan Mengandung Mineral Radioaktif di Botteng dan Takandeang, Mamuju, Sulawesi Barat Muhammad, Adi Gunawan; Indrastomo, Frederikus Dian; Sukadana, I Gde
EKSPLORIUM Vol. 38 No. 1 (2017): MEI 2017
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2017.38.1.3540

Abstract

The general investigation activities of radioactive minerals in Mamuju Area, West Sulawesi is a respon of the environmental radioactivity measurement result, which shows the existence of high radioactivity value. High radioactive mineral content found in Botteng and Takandeang Villages. From the outcrops, they composed of leucite-basalt rocks; meanwhile the subsurface characteristics of this area are unknown. To characterize the subsurface geology, related to uranium and thorium mineralization in Botteng and Takandeang area, geophysical measurement conducted using resistivity and Induced Polarization (IP) methods. The measurements carried out using Wenner and dipole-dipole configurations. The measurements started with the creation of six measurement paths where three lines: GF/BTGY-01, GF/BTGK-02, and GF/BTGK-04 are in Botteng and three other lines: GF/TKDK-01, GF/TKDK-07 and, GF/TKDY-06 are in Takandeang. Measurements conducted by crossing the surface radiometric anomaly distribution. The result showed anomaly occurences on autobreccia distribution in GF/TKDY-6, GF/TKDK-07, and GF/BTGK-04 locations. Several mineralization indication on surface identified in GF/BTGK-0, and GF/TKDK-01 sections, charaterized by chargeability anomalies more than 25.14 ms and 81.4 ms respectively. All significant anomalies are recomended as drilling location.
Pengaruh Temperatur, Waktu, dan Aditif Dalam Pembuatan Zircon Micronized Sajima, Sajima; Moch Setyadji
EKSPLORIUM Vol. 38 No. 1 (2017): MEI 2017
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2017.38.1.3533

Abstract

Research on temperature, time and additives effects on milling process in micronized-zircon production has been conducted. The production of zircon micronized started from sorting process on mining products then followed by beneficiation, roasting, leaching, dryng and milling processes. The results showed that the optimum conditions of the roasting process was at the temperature of 425 °C, in 25 minutes and using 4% additives. In these conditions, micronized zircon (2 µm) obtained as much as 92.10% in10 minutes milling time.
Peningkatan Perolehan Uranium, Torium, dan Logam Tanah Jarang dalam Residu Pelarutan Parsial pada Pengolahan Monasit Fatihah, Novita Sari; Anggraini, Mutia; Pratama, Afiq Azfar; Widana, Kurnia Setiawan
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.2021.42.2.6044

Abstract

Monazite is a by-product of tin processing containing phosphate, rare earth elements, and radioactive elements such as uranium and thorium. These elements can be utilized optimally if separated from one another through processing. Monazite processing includes decomposition, partial dissolution, and precipitation processes. The separation of rare earth elements from radioactive elements in monazite is carried out through a partial dissolution process, but the separation is not optimal so that further processes are needed to increase the recovery of these elements. In this study, the process was carried out using two methods, namely total dissolution with hydrochloric acid (HCl) which aims to dissolve all elements in the precipitate and precipitation with ammonium hydroxide (NH4OH) which aims to separate radioactive elements and rare earth elements. Both methods were carried out under optimum process conditions with various variations in pH, temperature, and time. Based on observations, it was found that the optimum solubility of each element was 67.6% uranium, 15.3% thorium and 50.8% LTJ under the dissolving process conditions of pH 1, at 80°C for 2 hours. While in the deposition process, the precipitation recovery of each element is 57% uranium, 75.7% thorium, 4.8% rare earth metals at pH 6 conditions. Based on these data, it can be concluded that uranium, thorium, and rare earth elements can be dissolved at pH 1, at 80°C for 2 hours, and can be separated at pH 6 precipitation conditions.
Penentuan Komposisi Bahan Bakar Nabati Dalam Bahan Bakar Minyak Campuran Menggunakan Metode Direct Counting C-14 Sanusi, Neneng Laksminingpuri; Ramadhani, Moch Faizal; Nurfadhlini; Aisyah, Lies
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.2021.42.2.6363

Abstract

The composition of biofuel (BF) in mixed oil fuel (MOF) has been determined using the C-14 direct counting method. Determination of the composition of BF in MOF was carried out by pipetting 10 mL of BBMC into a glass vial and then adding 10 mL of Ultima Gold F (UGF) scintillator solution into it. The vial was shaken so that the mixture became homogeneous and then counted using the Elmer Perkin 2900TR LSC (Liquid Scintillation Counter) for 20 minutes for 30 cycles. The results of the counting are displayed in the form of tSIE (transformed external standard spectrum) and cpm (counts per minute). The results of the analysis show that the value of cpm increases with the increase in the percentage of BF in MOF. The lowest and highest cpm values for gasoline, avtur, and diesel samples were 14.2363 and 62.0343, 10.664 and 44.535, and 9.410 and 61.789, respectively. There is a strong correlation between tSIE and cpm values for gasoline and diesel but not for avtur. The results of the analysis of the test sample indicate that the sample is outside the sample series graph. This direct counting method is expected to be a reference in the BBMC quality test.
Review on Granitic Rocks in Sumatra: Intrusion Process, Classification, Mineralization, and Potential Uses Irzon, Ronaldo; Syaeful, Heri; Kusworo, Aries; Wahyudiono, Joko; Ngadenin
EKSPLORIUM Vol. 43 No. 1 (2022): MAY 2022
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2022.43.1.6471

Abstract

Granitic rocks are widely distributed in Sumatra and surrounding areas. These granitoids are classified into several granite provinces of Southeast Asia with different intrusion processes and specific characteristics. This paper aims to review the intrusion of granitic rocks in Sumatra and describe the opportunities associated with it. Granite rocks are used to manufacture cultural heritage, works of art, and ornaments because of their weathering resistance, color diversity, and hardness characters. S-type granite intrusion in Sumatra might be associated with tin mineralization while silver-gold with the I-type. Theoretically, granite contains more REE than other igneous rocks. Mining and extraction difficulties complicate the direct REE exploitation from fresh granite. A-type granite relatively contains more REE than the other types, but this type of granite is not correlated with certain provinces. Indonesia has a tropical climate which is prone to weathering. Therefore, it is possible for REE and/or bauxite enrichments in the granite weathering horizon. Granite is assumed to be a potential source of uranium and thorium, especially for the S-type, because it is formed through the compression of sediments that can absorb these radioactive elements from the continental crust.
Ore Mineralization Characteristics in Hydrothermal Alteration at Mangunharjo and Surrounding Area, Pacitan, Indonesia Baba, Abdul Faisal; Mulyaningsih, Sri; Hidayah, Radhitya Adzan
EKSPLORIUM Vol. 43 No. 1 (2022): MAY 2022
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2022.43.1.6194

Abstract

The research area is located in Mangunharjo-Grindulu, Pacitan (Indonesia), as part of the Southern Mountain Tertiary Volcanic Arch. Outcrops of quartz veins-riched volcanic rock associated with sulfide minerals are found in this area. The Southern Mountain Oligo-Miocene magmatic arc is known as the potential area that contains precious metal deposits. The study aimed to determine the characteristics of the mineralized zone in this area. The research methods are geological surface mapping, thin-section observation, mineragraphy, and X-Ray Diffraction (XRD). The results show that the constituent lithologies were andesitic lava, breccia, and tuff; co-ignimbrite breccia, dacitic pumice and tuff, and dacitic dike; and pyroxene-rich andesitic volcanic rocks. The geological structure is dominated by oblique normal faults, strike-slip faults, and upward oblique faults associated with shear joints filled with quartz veins. Fieldwork observation, thin-section analyses, and mineragraphic and XRD observations identify three alteration zones in the hydrothermal system: the advanced argillic zone, the intermediate argillic zone, and the chloritized zone. By the mineral’s association, it is interpreted that the advanced argillic zone was formed at a temperature of 220-330oC and pH 3-6 due to dissemination with side rocks located near the hydrothermal flows; the intermediate argillic zone and the chloritized zone were formed at a temperature of 150-300oC and a pH of 5-6 due to chloritized alteration of the hydrothermal fluid carrying the ore. This alteration zone has no economic potential for precious metal minerals so it is better to be developed for education, conservation, and natural laboratories.
Sub-surface Geological Modeling Based on Gravity Residual Data in Adang Volcanic Rock Area, Mamuju, West Sulawesi Province Karunianto, Adhika Junara; Haryanto, Dwi; Ngadenin
EKSPLORIUM Vol. 43 No. 1 (2022): MAY 2022
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2022.43.1.6089

Abstract

The Mamuju area of West Sulawesi Province is composed of Adang volcanic rock that is a product of the process of volcanism in a volcanic complex with an eruption center and several lava domes. The geology of the study area is composed of eleven rock units, namely Adang breccia, Adang lava, lava dome, volcanic conglomerate, Ampalas breccia, Malunda breccia, Boteng lava, Tapalang breccia, limestone, reef limestone, and alluvium. The mineralization of uranium, thorium, and rare earth elements formed in Adang lava thorianite veins. Adang lava is intruded by a dioritoid found in the Mamuju river upstream. The gravity modeling technique has produced two 2-D subsurface models based on gravity data on 2-D cross-sections of the residual gravity map. It is known that the rock density range from 2.10 to 2.85 g/cm3 in the study area. Based on the interpretation of two 2-D subsurface models, a batholith, a giant-sized intrusive rock, is found in the southeastern part of the study area with a rock density of about 2.85 g/cm3 and is interpreted to be dioritoids. Furthermore, deep intrusion rocks also occur in the center part of the study area with a rock density of 2.8 g/cm3. It is estimated to be the same as the rock in the southeastern part of the study area. Dioritoid intrudes a volcanic breccia sedimentary rock with a density of about 2.1 g/cm3.

Page 14 of 18 | Total Record : 176

 12   13   14   15   16 

Filter by Year

2011 2025


Reset
Filter By Issues
All Issue Vol. 46 No. 2 (2025): NOVEMBER 2025 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