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

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Time-Relation of Poly Metamorphic Recrystallisation in the Precambrian Rocks of the Sonapet Valley, Eastern India


Affiliations
1 Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, India
     

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Three phases of high grade metamorphism are recognised here. These are dated with reference to the four phases of deformation recognised in this area. It is concluded that the index minerals are progressive in time and space; the metamorphisms are also synkinematic to post-kinematic. Zonal patterns are analysed and it is seen that these show synchronous fold shapes. Folding of the geoisothermals seems to be the best explanation for the metamorphic episodes.
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  • Time-Relation of Poly Metamorphic Recrystallisation in the Precambrian Rocks of the Sonapet Valley, Eastern India

Abstract Views: 243  |  PDF Views: 2

Authors

D. S. Bhattacharyya
Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, India

Abstract


Three phases of high grade metamorphism are recognised here. These are dated with reference to the four phases of deformation recognised in this area. It is concluded that the index minerals are progressive in time and space; the metamorphisms are also synkinematic to post-kinematic. Zonal patterns are analysed and it is seen that these show synchronous fold shapes. Folding of the geoisothermals seems to be the best explanation for the metamorphic episodes.