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Pre-Cambrian Geochronology of Nagpur-Bhandara-Drug, India

Published online by Cambridge University Press:  01 May 2009

S. N. Sarkar ,
E. K. Gerling ,
A. A. Polkanov  and
F. V. Chukrov
S. N. Sarkar
Affiliation:
Department of Applied Geology, Indian School of Mines, Dhanbad.
E. K. Gerling
Affiliation:
Laboratory for Pre-Cambrian Geology, U.S.S.R. Akad. Sci., Leningrad.
A. A. Polkanov
Affiliation:
Laboratory for Pre-Cambrian Geology, U.S.S.R. Akad. Sci., Leningrad.
F. V. Chukrov
Affiliation:
Institute of Economic Geology, Petrology, Mineralogy, and Geochemistry, U.S.S.R. Akad. Sci., Moscow.
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Abstract

On the basis of stratigraphic, tectonic, and metamorphic studies in certain critical Pre-Cambrian areas of Nagpur-Bhandara-Drug region and twenty-six K-Ar age data of representative samples, the authors have suggested a new generalized succession and correlation of the dated orogenic cycles and phases, and have drawn the following conclusions:-

(a) Amgaon cycle closed during the period 1444–1730 m.y.

(b) Sakoli cycle (I phase) closed at 1330 m.y., and during Sausar orogeny (864–996 m.y.) the north-western part of Sakoli syn-clinorium was deformed and metamorphosed (862–950 m.y.).

(c) Sausars and Sakolis, both post-Amgaon in age, were deposited in separate basins and had different tectonic histories.

(d) Nandgaon folding phase (< c. 1200 m.y.) affecting Bijli rhyolites is younger than Sakoli (I phase), and Chattisgarh Cuddapahs are younger than Khairagarh phase (< c. 600 m.y.).

(e) In Bastar area Bailadila cycle closed at c. 2100 m.y.

Type
Articles
Information
Geological Magazine , Volume 104 , Issue 6 , December 1967 , pp. 525 - 549
Copyright
Copyright © Cambridge University Press 1967

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