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Deformation of terrane boundary shear zone (Lakhna shear zone) between Eastern Ghats Mobile Belt and Bastar Craton in Balangir and Kalahandi Districts, Orissa

DSpace at IIT Bombay

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Title Deformation of terrane boundary shear zone (Lakhna shear zone) between Eastern Ghats Mobile Belt and Bastar Craton in Balangir and Kalahandi Districts, Orissa
 
Creator BISWAL, TK
JENA, SK
DATTA, S
DAS, R
KHAN, K
 
Subject india
transpression
antarctica
tectonics
example
strains
terrane boundary
lakhna shear zone
strain evaluation
eastern ghats mobile belt
bastar craton
orissa
 
Description The terrane boundary between Eastern Ghats Mobile Belt and the Bastar Craton in Balangir and Kalahandi Districts of Orissa is distinctly marked by nearly two kilometer wide southeasterly dipping ductile shear zone, designated as the Lakhna shear zone. The shear zone has largely developed in the cotton, but for a narrow width within the Eastern Ghats. It is dominated by quartzofeldspathic mylonites characterised by S-C fabric, asymmetric winged porphyroclasts, quartz ribbons and intragranular faults. These structures have been effectively utilized in deducing the sense of shear and evaluating the amount of strain. The results show thrusting of the Eastern Ghats over the Bastar Craton. The minimum amount of throw along the thrust has been estimated to be around 2.5 to 4.7 km assuming a dominant simple shear deformation.
 
Publisher GEOLOGICAL SOC INDIA
 
Date 2011-07-29T22:12:22Z
2011-12-26T12:52:39Z
2011-12-27T05:39:17Z
2011-07-29T22:12:22Z
2011-12-26T12:52:39Z
2011-12-27T05:39:17Z
2000
 
Type Article
 
Identifier JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA, 55(4), 367-380
0016-7622
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7848
http://hdl.handle.net/10054/7848
 
Language en