Evidences of Large-Scale Shearing from South-Eastern Extension of The Mahakoshal Belt, Covering Parts of Sidhi & Singrauli Districts of Madhya Pradesh and Sonbhadra District, Uttar Pradesh, India _ Crimson Publishers
Evidences of Large-Scale Shearing from South-Eastern Extension of The Mahakoshal Belt, Covering Parts of Sidhi & Singrauli Districts of Madhya Pradesh and Sonbhadra District, Uttar Pradesh, India by Banerji DC in Integrative Journal of Conference Proceedings
The WNW-ESE trending arm of the Mahakoshal belt, extending towards
south-east in the state of Jharkhand, through U.P, exposes variety of
structural features those are uncommon in main Mahakoshals having ENE-WSW
trend. The turbidites, said to be characteristic of the Parsoi Formation of the
WNW trending arm, appear to be shear generated structures, having imprints
across the length and width of the arm. Evidences of bulk flow along the
pervasive foliation make it a mylonitic foliation, restricting possibility of
survival of primary structures.
Overwhelming presence of anticlockwise rotated fabric elements, producing S-C structure in phyllite/ phyllonite and in meta-greywacke, along with frequent presence of ‘alpha’ and ‘delta’ type structures, strongly asymmetric ‘S’ and at places ‘Z’ shaped folds and the sheath folds suggest that the ductile shearing with a sinistral shear sense is spread over the entire WNW trending sinuous arm of Mahakoshals. This belt has a strong manifestation on the imagery, maintaining a cross cutting relationship with the ENEWSW trending fabric of the main Mahakoshals and appears to be superposed over it. Evidences suggest it to be a wide and extensive shear zone.
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