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Some factors bearing on the natural synthesis of clays in the granites of south-west England

Published online by Cambridge University Press:  14 March 2018

C. S. Exley
C. S. Exley*
Affiliation:
Department of Geology, University of Keele, Staffordshire
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Abstract

The synthesis of kandites in the granites of south-west England has resulted from the breakdown of albite or oligoclase by hydrothermal solutions using joints and faults as channels. The crystallinity of the clay mineral and the extent of argillization are related to the distance from these channels. Intermediate stages between felspar and kaolinite remain obscure but recent evidence suggests that they may be represented by montmorillonite. Little is known about the composition of hydrothermal solutions: fluorine and boron determinations on rocks in various stages of argillization suggest that neither of these elements was an important constituent.

Type
Research Article
Information
Clay Minerals Bulletin , Volume 5 , Issue 32 , December 1964 , pp. 411 - 426
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1964

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