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Fission track ages of biotites from crystalline rocks of Khammam district, Andhra Pradesh, India

Published online by Cambridge University Press:  01 May 2009

M. K. Nagpal ,
K. B. Powar  and
K. K. Nagpaul
M. K. Nagpal
Affiliation:
Department of Physics, National Defence Academy, Khadakvasla, Pune, 411023, India
K. B. Powar
Affiliation:
Department of Geology, University of PoonaPune, 411007, India
K. K. Nagpaul
Affiliation:
Department of Physics, Kurukshetra University, Kurukshetra, 132119, India
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Summary

A modified fission track technique has been used for datingbiotite flakes from crystalline rocks of Khammam district in Andhra Pradesh, India. The recorded fission track ages of 368±15 Ma to 616±20 Ma, with a mean of 475±90 Ma, correspond to the period of the Indian Ocean cycle. The data suggest an average cooling rate of about 0.6 °C per million years for the closing phase of this cycle.

Type
Articles
Information
Geological Magazine , Volume 115 , Issue 6 , November 1978 , pp. 443 - 446
Copyright
Copyright © Cambridge University Press 1978

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