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An occurrence of a regular mixed-layer clay-mineral

Published online by Cambridge University Press:  14 March 2018

H. Heystek
H. Heystek*
Affiliation:
National Chemical Research Laboratory, South African Council for Scientific and Industrial Research, Pretoria
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Abstract

About twelve miles south-east of Burghersdorp in the Cape Province, South Africa, the unusual clay reported in this paper was first discovered on the farms 'Groenvlei' and 'Kuilfontein'. Later deposits were also uncovered on the farms 'Kapokkraal' and 'Kleinhoek'.

The clay-mineral appears to be of a very unusual type, namely, a regular mixed-layer clay-mineral (1:1 hydrous mica and montmorillonite). The mode of origin of the clay is also of interest in that it appears to be produced from a shale by hydrothermal alteration, due to intrusion of dolerite sheets.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 30 , Issue 225 , June 1954 , pp. 400 - 408
Copyright
Copyright © 1954, The Mineralogical Society

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