• T. Amaldev
• K. R. Baiju

The deformation history of the Southern Granulite Terrain is as complicated one as its metamorphic evolution is polyphased with multiple thermal events. In this present study detailed lithological mapping and analysis of structural fabric of the Precambrian metamorphic rocks in and around Erattupetta area, Western Madurai Block, Southern Granulite Terrain. The different tectonic impulses varying in magnitude and direction have left their imprints in the tectonites in the form of the mesoscopic and macroscopic structures. Systematic analysis of structures reveals that the area has been affected by polyphase deformation. The textural and mineralogical evidences suggest that rocks undergone high grade metamorphism and influenced by different tectono-metamorphic events. It is suggested that, these multiple and complex structural and metamorphic events could be chronologically constrained for better perception and evaluation of the tectonic history of this terrain.

Deformation, retrogression, Western Madurai Block, southern India

"Evidences of polyphase deformation and retrogression in high-grade metamorphic rocks – a case study from the Western Madurai Block, Southern India", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.951-958, August-2018, Available :http://www.jetir.org/papers/JETIR1808140.pdf

"Evidences of polyphase deformation and retrogression in high-grade metamorphic rocks – a case study from the Western Madurai Block, Southern India", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp951-958, August-2018, Available at : http://www.jetir.org/papers/JETIR1808140.pdf