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Genesis of chrysoberyl in the pegmatites of southern Kerala, India

Published online by Cambridge University Press:  05 July 2018

K. Soman  and
N. G. K. Nair
K. Soman
Affiliation:
Centre for Earth Science Studies, Trivandrum-695010, India
N. G. K. Nair
Affiliation:
Centre for Earth Science Studies, Trivandrum-695010, India
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Abstract

In southern Kerala, India, chrysoberyl occurs in granitic pegmatites in association with quartz in alkali feldspar and is thought to crystallize earlier than beryl and sillimanite. The pegmatites are thought to have derived from the residual melts of granitic liquids formed by partial melting of the khondalites. In the absence of pyrometasomatic, desilication or aluminium-contamination processes, the genesis of chrysoberyl is explained by the CO2 activity in residual melts. This model is at variance with the known concepts and may also explain the genesis of chrysoberyl in Sri Lanka where it is still controversial.

Keywords

chrysoberylpegmatitesKeralaIndia
Type
Research Article
Information
Mineralogical Magazine , Volume 49 , Issue 354 , December 1985 , pp. 733 - 738
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1985

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