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- Title
Radioelemental distribution in Neoproterozoic volcano-sedimentary Sindreth Basin, Sirohi District, Rajasthan and its significance.
- Authors
Somani, O. P.; Misra, Arpan; Jeyagopal, A. V.; Nanda, L. K.; Parihar, P. S.
- Abstract
The U/Th ratios in rocks of the Neoproterozoic volcanosedimentary Sindreth Basin and its surroundings represented by Erinpura Granite/Migmatite and Mesoproterozoic Sirohi metasedimentary rocks occurring at Sindreth, Sirohi District, Rajasthan, have been studied. The felsic rocks occurring in the western part of the basin are marked by low U/Th ratios. The rocks of Sirohi Group and the Erinpura Granite also show low U/Th ratio which indicates removal or depletion of uranium. The polymictic conglomerate and basic rock in the eastern margin of the Sindreth Basin show significantly higher U/Th ratios suggesting enrichment of uranium due to remobilization and the resultant uranium mineralization (U3O8 values 0.014-0.098 and ThO2 < 0.01%) associated with alterations, viz. limonitization, chloritization, haematitization, silicification and sericitization. U-mineralization in the Sindreth Basin is a new find and is of volcanogenic-type.
- Subjects
RAJASTHAN (India); INDIA; PROTEROZOIC Era; VOLCANOES; SEDIMENTARY basins; RADIOACTIVE elements; URANIUM enrichment
- Publication
Current Science (00113891), 2012, Vol 103, Issue 3, p305
- ISSN
0011-3891
- Publication type
Article