Two different facies viz., amphibolite and granulite Sepereted by transitional facies occurs in the study area. The controlling factors which had brought about the variation in the facies conditions are considered to be the Dharwarian sediments (supracrustals), run by shear zone running NNE SSW. These acted as 'resisters' to on advancing front of the granitization closepet granite (2380+/-50 Ma, Crawford, 1969), which moved from west to east in the area. The migmatization from the west could not affect the eastern area, where was encountered the region of the resisters, which acted some sort of a barrier to the granilization. This explains the existence of non-migmatitic rocks on the east side and the formation of a transitional facies between amphibolite and granulite.
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Cite this article:
S. Ramanathan (1994). Closepet Granite intrusion and the role of Resisters in the Metamorphic history of the area around Manalur South and North Arcot Districts, Tamilnadu, India. Journal of Ravishankar University (Part-B: Science), 7(1), pp. 23-27.