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Spinels from the Dawros Peridotite, Connemara, Ireland

Published online by Cambridge University Press:  05 July 2018

A. T. V. Rothstein
A. T. V. Rothstein*
Affiliation:
Department of Chemistry and Geology, Portsmouth Polytechnic, Portsmouth PO1 3QL
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Summary

Two different spinels, analyses of which are given, occur in the layered ultramafic rocks at Dawros. Chrome spinel occurs both as gravity-stratified cumulates and as complex orbs, while an Al-rich spinel is both in rocks of the main Dawros magmatic sequence and in an association with an aluminous bronzite, which may originate by recrystallization. It is concluded that while the chrome spinel is certainly of magmatic origin, the aluminous spinel is probably partly of magmatic and partly of recrystallization origin.

Type
Research Article
Information
Mineralogical Magazine , Volume 38 , Issue 300 , December 1972 , pp. 957 - 960
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1972

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