Elemental mapping micro-XRF (EMMX) analysis for identifying uranium and thorium bearing minerals in Rantedoda Area, Mamuju, West Sulawesi

The radioactive anomalies finding in Rantedoda area, Tapalang sub-district, Mamuju, West Sulawesi, give a clue that there are potential of radioactive mineral in this area. In Botteng, Takandeang, and Hulu Mamuju area in Mamuju, davidite ((U, Ce, Fe)2(Ti, Fe, V, Cr)5O12), thorianite (ThO2), britholi...

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Bibliographic Details
Main Authors: Pratiwi, Fadiah, Rachael, Yoshi, Syaeful, Heri, Sukadana, I. Gde, Indrastomo, Frederikus Dian
Format: Conference Proceeding
Language:English
Subjects:
Apatite
Cerium
Clay minerals
Distribution patterns
Mapping
Minerals
Monazite
Montmorillonite
Phosphorus pentoxide
Rare earth elements
Thorium
Thorium oxides
Uranium
Uranium dioxide
Yttrium oxide
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Summary:The radioactive anomalies finding in Rantedoda area, Tapalang sub-district, Mamuju, West Sulawesi, give a clue that there are potential of radioactive mineral in this area. In Botteng, Takandeang, and Hulu Mamuju area in Mamuju, davidite ((U, Ce, Fe)2(Ti, Fe, V, Cr)5O12), thorianite (ThO2), britholite (Ce, Ca, X)5(SiO4)3(OH), thorutite (Th, U, Ca)Ti2(O, OH)6, and monazite (REE, Th(PO4)) were found as primary radioactive minerals, meanwhile gummite (UO3.nH2O) and autunite (CaO.2UO3.P2O5.8H2O) were found as secondary radioactive minerals. Analysis of uranium and thorium bearing minerals in the Rantedoda area has never been carried out, so the type of radioactive minerals in this area is still unknown. The objective of this research is to identify U and Th-bearing minerals from Rantedoda, using Elemental Mapping Micro-XRF (EMMX) analysis to figure out the elemental distribution, geochemical composition, and determine U-and Th-bearing minerals. The presences of ThO2 range from 0.06-0.13 wt%, UO2 0.00-0.09 wt%, and rare earth elements range from 0.00-1.21 wt%, dominantly composed by Y2O3 0.00-0.03 wt%, and Ce2O3 0.21-1.21 wt%. Analysis results show that the distribution pattern of U is similar to the distribution of Ca, P, and Sr elements, and in groundmass, meanwhile Th is mostly distributed in groundmass. Mineral identification by Advanced Mineral Identification and Characterization System (AMICS) shows that U and Th accumulated on apatite mineral and groundmass that consisted of clay minerals such as montmorillonite and chlorite. These minerals occurrences can be a guide to the next exploration target.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0192902