Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

Rajan B. Jain ¹, O. P. Yadav ¹, M. Rahman ¹, S. Thippeswamy ², S. Fahmi ¹, D. K. Sharma ¹, Govind Singh ¹

Affiliations
1 Atomic Minerals Division, J.L.N. Marg, Uniara Garden, Jaipur - 302 004, IN
2 Atomic Minerals Division, Nagarabhavi, Bangalore, IN

Abstract

A partly concealed radioactive alibitized pegmatoid/quartz albitite body (1200 m x 0.5 to 20 m) containing 0.010 to 0.190% U₃O₈ and 0.007 to 0.076% ThO₂ and about 20 brick red coloured albitite lenses varying in dimension from 13 m x 7 m to 220 m x 12-30 m and containing 0.022 to 3.50% U₃O₈ and 2 are described at Banjaron Ki Dhani, new Maonda in north Rajasthan. Davidite, brannerite, rutile, anatase, zircon, monazite and traces of uraninite have been identified in the albitites. A metasomatic origin for the albitites is suggested. The distribution of albitites along NE-SW to NW-SE and E-W trending weak structural planes and the coincidence of 'Albitite Line' with Kaliguman lineament, demonstrates the tectonic control of albitization.

Keywords

Geochemistry, Albitite, Soda Metasomatism, Radioactivity, Rajasthan.

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I. Bhattacharjee ¹, M. Agarwal ¹, O. P. Yadav ¹, M. K. Roy ¹, V. P. Saxena ²

Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Nagpur - 440 001, IN
2 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Hyderabad - 500 016, IN

Abstract

The paper reports for the first time uranium mineralisation associated with phosphatic tuffaceous shale of the Lower Vindhyan Semri Group, near the southern margin of Son Valley around Mankisar-Karaundiya-Kathar area. Grab samples from this rock unit analyzed upto 900 ppm of U₃O₈ and upto 18.5 % of P₂O₅. Uranium enrichment in tuffaceous shale has been inferred due to hydrothermal activity.

Keywords

Uranium Mineralization, Semri Group, Sidhi District, Madhya Pradesh.

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O. P. Yadav ¹, P. K. Panchal ¹, T. S. Miglani ¹, V. P. Saxena ²

Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Jaipur - 303 906,, IN
2 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Hyderabad - 500 016, IN

Abstract

No Abstract.

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O. P. Yadav ¹, T. B. Babu ¹, P. K. Shrivastava ¹, A. K. Pande ¹, K. R. Gupta ¹

Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Western Region, Jaipur - 302 004, IN

Abstract

Quaternary sequences of mud/silt with carbonaceous matter and coaly layers, sandstone and conglomerate is found in the structural depressions near Jahajpur basin in Rajasthan. Uranium is also found in these sediments which may have been derived from the basement of Berach Granite and phyllites of Jahajpur Group.

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B. Venkateswaran ¹, I. H, Israili ¹, O. P. Yadav ¹, V. P. Saxena ²

Affiliations
1 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Nagpur- 440 001, IN
2 Atomic Minerals Directorate for Exploration and Research, Department of Atomic Energy, Hyderabad - 500 0 16, IN

Abstract

Significant uranium mineralisation associated with subfeldspathic arenite of Lower Denwa Formation (Mid Triassic) has been located at Kharatoria, dist Chhindwara, M P in Satpura Gondwana Basin. Grab samples collected from the radioactive horizon analysed up to 0 1%U₃O₈, with <0 005%ThO_2. Besides, a spring sediment sample collected from the same locality indicated anomalous concentration of U, Zn, Pb and Ce and Th. Preliminary studies revealed the possibility of sedimentary facies/Hydrothermal control of uranium mineralisation and probable presence of organic/Inorganic carbon induced reducing environment in the area.

Keywords

Uranium, Upper Gondwana, Genetic Controls, Kharatoria, Chhindwara District, Madhya Pradesh.

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