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.
Closepet Granite intrusion and
the role of Resisters in the Metamorphic history of the area around Manalur South and
North Arcot Districts,
Tamilnadu, India
S. Ramanathan
Department
of Geology, Presidency College, Madras-600 005
MS: Received: 14.10.93; Revised: 28.3.94;
Accepted: 20.4.94.
Abstract: 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.
Key words: Amphibolite, Granulite, tacies, Closepet granite, Resisters,
Transitional facies.
NOTE: Full version of this manuscript is
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