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All Journal Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Buletin Sumber Daya Geologi OLDI (Oseanologi dan Limnologi di Indonesia) MAHESA : Malahayati Health Student Journal Bulletin of Geology Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Bambang Priadi
Institut Teknologi Bandung
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Dentistry Earth & Planetary Sciences Education Energy Engineering Environmental Science Health Professions Materials Science & Nanotechnology Nursing Public Health Social Sciences

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Journal : Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir

 1 
Mobilitas Uranium pada Endapan Sedimen Sungai Aktif di Daerah Mamuju, Sulawesi Barat Mu’awanah, Frida Rosidatul; Priadi, Bambang; Widodo; Sukadana, I Gde; Andriansyah, Rian
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.2018.39.2.4953

Abstract

Mamuju is an area that has a high dose rate (radioactivity) value. The research area consists of 6 sectors namely Ahu, Orobatu, Takandeang, Botteng, Pangasaan, and Taan Sector. Lithological distribution does not represent the distribution of uranium; therefore geochemical method is needed to observe the distribution of uranium in the drainage system. The aim of this research is to provide an overview of the mobility and distribution of uranium in the drainage system using stream sediment. Uranium mobility analysis uses labile percent obtained from the ratio of total uranium and labile uranium, the total uranium value obtained from the measurement of X-Ray fluorescence spectrometry and the value of labile uranium obtained from measurement of labile fluorimetry. The sample taken from 4 potential areas based on radiometric value Map. The result of analysis shows that Ahu Sector has labile uranium anomaly >113.44 ppm, Pangasaan Sector with labile uranium anomaly >168.63 ppm, Takandeang Sector with uranium labile anomaly values >74.36 ppm, and Botteng Sector with uranium labile anomaly >84.23 ppm. The anomaly types identified from two sectors, namely Ahu Sector anomaly is related to the precipitation of dissolved uranium hydrolysates in stream deposit originating from Ahu lava and Tapalang breccia, while Takandeang Sector anomaly is related to the enrichment of in situ uranium in soil and Takandeang lava.
Peralihan Rezim Tektonik: Implikasinya pada Konsentrasi Torium di Mamasa dan Tana Toraja, Sulawesi-Indonesia Saputro, Sugeng Purwo; Purwaningsih, Dwi Ratih; Priadi, Bambang
EKSPLORIUM Vol. 41 No. 2 (2020): NOVEMBER 2020
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2020.41.2.6063

Abstract

Mamasa and Tana Toraja geographically are part of the western arm of Sulawesi Island. The mafic rocks in these areas and their surroundings have high radiation dose rate and thorium (Th) anomaly content. This research aim is to determine tectonic setting mechanism which play the important role on the increasing of Th concentration. Six rock samples were analysed using petrography and geochemical analyses (AAS, ICP-MS, NA, and XRF) completed with the 40K-40Ar dating on selected rock samples. Petrography observations show plagioclase, olivine, pyroxene, hornblende, nepheline, and allanite minerals presence in the rocks which identified as nepheline-basanite, basalt, trachybasalt, and gabbro. Numbers of texture appearances in the rocks indicate contamination and changes on tectonic setting. Geochemistry analysis shows that nepheline-basanite, basalt, trachybasalt, and gabbro (absarokite) were formed at the active continental margin (ACM), which is undergoing active subduction (westward subduction) to post-subduction transition. The changing of tectonic setting made magma solidify in extreme conditions. The magma solidify process is interpreted to occur at the age of 13.10-11.02 Ma. These mechanisms play an important role for the increase of thorium concentration in Mamasa and Tana Toraja.
Profil Unsur Tanah Jarang Granitoid Klabat di Pulau Bangka dengan Analisis Aktivasi Neutron Widana, Kurnia Setiawan; Priadi, Bambang; Handayani, Yustina Tri
EKSPLORIUM Vol. 35 No. 1 (2014): MEI 2014
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2014.35.1.1343

Abstract

Neutron Activation Analysis (NAA) is a powerful geochemical analysis with advantages which are nondestructive and involves multi-elements. NAA technique applied for qualitative and quantitative analyses on Klabat granitic rocks that distributes and compose the geology of Bangka Island. There are 27 samples analyzed which aims to determine the content of rare earth elements, which will be applied in petrotectonic of Klabat granitoid. Rare Earth Elements (REE) which analyzed, namely La, Ce, Nd, Sm, E, Gd, Tb, Yb, and Lu. All of the samples irradiated in the Centre of Multipurpose Reactor "Siwabessy", BATAN - Serpong and subsequently counted with High Purity Germanium detector (HPGe) considering half-life and elements contents that will be concerned both qualitative and quantitative analysis. The comparative quantitative analysis method conducted using Standard Reference Material (SRM) 2710a and 2711a that published by the National Institute of Standards & Technology (NIST). The result are the pattern of spider diagram with the chondrite normalized and showing the enrichment of La-Sm as light REE (LREE) and Eu-Lu slight decreasing as heavy REE (HREE), as identify of plutonic rocks thar formed in the continental arc.
Karakteristik Unsur Jejak Dalam Diskriminasi Magmatisme Granitoid Pulau Bangka Widana, Kurnia Setiawan; Priadi, Bambang
EKSPLORIUM Vol. 36 No. 1 (2015): MEI 2015
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/eksplorium.2015.36.1.2766

Abstract

Geology of Bangka Island consists by variation of granite as Klabat Granitoid scattered in various locations. Trace elements can be applied in magmatism discrimination of granitoid.The purpose of this study was to determine the characteristics Bangka Island granitoid based on trace element geochemistry to be applied in the study of magmatism, source and tectonic situation. Geochemical analyses method used are the Neutron Activation Analysis (NAA) and portableX-Ray Fluorescence (pXRF) for qualitative and quantitative analyses on 27 samples of Klabat granitoid on Bangka Island. This study concluded granitoid East Bangka (Belinyu) and Central Bangka as crust-mantle mixing with affinityCalc-Alkaline, characteristic of I Type while South and West Bangka granitoid crust origin with affinity high K Calc-Alkaline as S Type. Expectedmagmatismdiscrimination ofgranitoidhelpfulin providingradioactive mineral explorationguidein BangkaIsland.
Co-Authors Abdul Bari AI MARDHIYAH, AI Aliati Iswantari Andriansyah, Rian Basuki, Nurcahyo Indro Faisal, Reza Mochammad I Gde Sukadana Kristanto, Anang Hari Kurnia Setiawan Widana Kurniawan Kurniawan Mu’awanah, Frida Rosidatul Nugroho, Irfan Budiaji Prakoso, Vitas Atmadi Purwaningsih, Dwi Ratih Ramadhan, Aditya Rizki Reza Fahmi Saputro, Sugeng Purwo Sulaeman Sulaeman Suratman, Calvin Nanda Sutopo, Bronto Wicaksono, Hartaja Hatta Wicaksono, Hartaja Hatta Widodo Windy Rakhmawati Yustina Tri Handayani