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Occurrence of a montmorillonite mineral in the Nigerian younger granites at Ropp, Plateau Province, Northern Nigeria

Published online by Cambridge University Press:  14 March 2018

M. O. Oyawoye  and
D. M. Hirst
M. O. Oyawoye
Affiliation:
Department of Geology, University of Ibadan, Nigeria
D. M. Hirst
Affiliation:
Department of Geology, University of Durham
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Abstract

A montmorillonite mineral occurs in the marginal facies of a biotite-granite in the younger granite ring-complex at Ropp, Plateau Province, Northern Nigeria. The mineral is associated with the development of silexitic textures (pegmatitic knots and miarolitic cavities) filling the spaces between euhedral crystals of quartz, perthite and biotite protruding from the walls. Chemical, X-ray and differential thermal results suggest that the mineral belongs in the beidellite-nontronite series; it is thought to be primary in origin.

Type
Research Article
Information
Clay Minerals Bulletin , Volume 5 , Issue 32 , December 1964 , pp. 427 - 433
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1964

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