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Cr Mica from the Precambrian Erris Complex, NW Mayo, Ireland

Published online by Cambridge University Press:  05 July 2018

Michael D. Max ,
P. J. Treloar ,
J. A. Winchester  and
M. J. Oppenheim
Michael D. Max
Affiliation:
Geological Survey of Ireland, 14 Hume Street, Dublin 2, Ireland
P. J. Treloar
Affiliation:
Department of Geology, University of Zimbabwe, Harare, Zimbabwe
J. A. Winchester
Affiliation:
Department of Geology, University of Keele, Keele Staffordshire ST5 5BG
M. J. Oppenheim
Affiliation:
c/o Geological Survey of Ireland, 14 Hume Street, Dublin 2, Ireland
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Abstract

Cr micas identified as chrome phengites occur in association with other Cr-rich minerals in a peculiar schist which lies along a complex shear zone within the pre-Caledonian Erris Complex. The schist generally has a chaotic internal structure but locally there is a crude planar mineralogical zoning with a serpentinebearing zone structurally above a Cr mica zone. Chemical analyses indicate that the schist is a tectonic derivative of a mixture of rock with a pronounced metasomatic character.

Type
Research Article
Information
Mineralogical Magazine , Volume 47 , Issue 344 , September 1983 , pp. 359 - 364
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1984

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