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Muthamilselvan A.,Atomic Minerals Directorate for Exploration and Research Western Region | Panchal P.K.,Atomic Minerals Directorate for Exploration and Research Western Region | Nautiyal K.,Atomic Minerals Directorate for Exploration and Research Western Region | Yadav G.S.,Atomic Minerals Directorate for Exploration and Research Western Region | And 2 more authors.
Exploration and Research for Atomic Minerals | Year: 2011

Albitite and albitised metasediments hosted uranium mineralization occurs around Rela, Gashipura and Rayan Ka Bas areas in the East Khetri Basin (EKB) of North Delhi Fold Belt (NDFB), Rajasthan. It extends curvi-linearly over a strike length of 5 km from NW of Rayan ka Bas to ESE of Rela with a width of about 2 to 200 m. These occurrences arc located about 40 km east of the known 'albitite line' in Khetri sub-basin. Grab samples have analysed 5.01-13.55% Na 2O and <0.01-3.61% K 2O (n=7) with Na 2O/K 2O ratio of 1.39 to 1355 indicating higher concentration of soda over potash. Radiometric assay of grab samples (n=16) indicate 0.030 - 0.510% U 3O 8 with negligible thorium. Uranium occurrences have been identified mainly in the soda metasomatites, however, few potash metasomatites have also shown higher concentration of uranium. Brannerite ((U,Ca,Ce)(Ti,Fe) 2O 6) and U -Ti complex are the uranium phases identified in the study area. The present study reveals significance of the EKB as one of the potential targets for albitite and albitised metasediments hosted uranium mineralization in the NDFB. © Director, AMD DAE, Govt, of India.

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