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On the metamorphic facies of the Dahomeyan gneiss in the western Accra Plains, Ghana

Published online by Cambridge University Press:  05 July 2018

Richard F. Holm
Richard F. Holm*
Affiliation:
Department of Geology, Northern Arizona University, Flagstaff, Arizona
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Summary

In the Dahomeyan of the western Accra Plains mafie gneisses, amphibolites, and ortho-amphibolite dykes in granitic gneiss occur. During the latest recrystallization, metamorphic conditions ranged (north to south) from oligoclase-epidote amphibolite subfacies through andesine-epidote amphibolite subfacies to at least the medium or upper part of the amphibolite facies. Chemical analyses of hornblende, garnet, and clinopyroxene from two mafic gneiss specimens supplement data from the Mampong specimen (Knorring and Kennedy, 1958) and indicate that mineral compositions are largely controlled by rock compositions.

Type
Research Article
Information
Mineralogical Magazine , Volume 39 , Issue 302 , June 1973 , pp. 224 - 232
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1973

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