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Abraded pyrite crystals from the Witwatersrand gold mines

Published online by Cambridge University Press:  14 March 2018

J. J. Frankel
J. J. Frankel*
Affiliation:
Department of Geology, University of Natal, Durban
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Summary

Metamorphosed dyke rocks in Witwatersrand gold mines carry pyrite crystals of unusual appearance. These crystals, particularly along the dyke margins, show curved and scratched surfaces that cut across crystal faces. The abrasion of the crystals is due to movement of dyke material under pressure. There is some suggestion of surface flow on the abraded surfaces. No deformation or granulation was obtained in laboratory experiments on pyrite crystals. Pressure shadows around the pyrite are described.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 31 , Issue 236 , March 1957 , pp. 392 - 401
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1957

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References

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