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Microstructural evolution of the garnet metapellites near Sawantwadi , Sindhudurg District , Maharashtra
, Pradeep Jadhav B, T Marathe
Published in Wadia Institute of Himalayan Geology
2019
Volume: 40
   
Issue: 1
Pages: 58 - 66
Abstract
Oriented thin sections of garnet bearing metapellites belonging to the supracrustal sequence exposed near Sawantwadi taluka of Sindhudurg district of coastal Maharashtra have been studied in detail. The regional and meso-scale field investigations helped infer three ductile deformational events (D1, D2 and D3) in the study area giving rise to hook shaped folds (Type III interference pattern). The analysis of oriented thin sections, photomicrographic mosaics (manually prepared) and the stable mineral assemblages of garnet, biotite, muscovite, chlorite, quartz and some feldspar identified from thin sections indicate garnet zone of metamorphism for the metapellites. This analysis has also pointed out to the evolution of garnet from biotite by prograde metamorphism during the successive metamorphic events. Formation of biotite and chlorite from garnet by retrograde metamorphism at the end of third deformational event is also observed. A strong structural overprint and a complex deformation history is revealed by the analysis and synthesis of Macro-, Meso-and Micro-scale observations of the supracrustal rocks in the present study area. © 2019, Wadia Institute of Himalayan Geology. All rights reserved.
About the journal
JournalHIMALAYAN GEOLOGY
PublisherWadia Institute of Himalayan Geology
ISSN09718966
Open AccessNo