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Ocellar Hybrids from the Tyrone Igneous Series, Ireland

Published online by Cambridge University Press:  01 May 2009

N. S. Angus
N. S. Angus
Affiliation:
Department of Geology, The University, Hull.
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Abstract

Ocellar hybrid rocks, formed by metasomatic transformation of basalt xenoliths engulfed in granitic magma, are characterized by numerous small, oval quartz porphyroblasts, each sheathed with narrow rims of amphibole. The progressive development of these quartz ocelli, together with the general texture of the ocellar hybrid, is traced through a number of intermediate hybrid types. In some instances, the ocellar hybrid displays an intrusive relationship toward basalt and is thought to have undergone a certain amount of metasomatic mobilization.

Type
Articles
Information
Geological Magazine , Volume 99 , Issue 1 , February 1962 , pp. 9 - 26
Copyright
Copyright © Cambridge University Press 1962

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