Uranium mineralisation associated with felsic volcanism at Mohar,Shivpuri district,Madhya Pradesh |
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| Authors: | D Bhattacharya G B Joshi Rakesh Sharma |
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| Institution: | 1.Atomic Minerals Directorate for Exploration and Research,Bangalore,India;2.Atomic Minerals Directorate for Exploration and Research,Shillong,India;3.Atomic Minerals Directorate for Exploration and Research,Hyderabad,India |
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| Abstract: | Several small lensoidal bodies of felsic volcanics are exposed in a curvilinear pattern within the brecciated granitoids of
Bundelkhand Gneissic Complex (BGC) at Mohar. Sub-surface data reveals extensive presence of these felsic volcanics below the
sediment of Vindhyan Supergroup. It occurs like a sheet with thickness varying from 12 m to 134 m. Its lateral extent has
been traced upto 4.8 km. Multiple flows of felsic magma are identified based on colour, granularity, cross cutting relations
and cyclic distribution of multiple vesicular bands along the entire thickness of felsic magma. The felsic rock contains upto
13.21% K2O. Chemical composition of these felsic volcanics varies across the column. Petrographically and chemically all these felsic
volcanics are identified as rhyolite or rhyolite tuff. |
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