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A bedded deposit of anthophyllite schist in the Precambrian belt of Nellore, South India

Published online by Cambridge University Press:  01 May 2009

T. Ramamohana Rao
T. Ramamohana Rao
Affiliation:
Geology DepartmentAndhra UniversityWaltairIndia
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Summary

A pure anthophyllite schist occurs as a bedded deposit conformable with garnet-bearing quartz—muscovite, and quartz—chlorite—biotite schists and diopside-bearing caic-silicate rocks in the north-central part of the Nellore Schist Belt. Field and petrochemical studies show that anthophyllite schist has formed from regional metamorphism of Fe-, Mg-rich aluminous sediments aided by metamorphic differentiation due to local kinematic action under amphibolite facies conditions which is the general grade of metamorphism of the Nellore Schist Belt. A pure anthophyllite schist of sedimentary origin reported here is the first of its kind described from any terrain.

Type
Articles
Information
Geological Magazine , Volume 111 , Issue 3 , May 1974 , pp. 221 - 228
Copyright
Copyright © Cambridge University Press 1974

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