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The mineralogy of Egyptian serpentinites and talc-earbonates

Published online by Cambridge University Press:  05 July 2018

E. Z. Basta  and
Z. Abdel Kader
E. Z. Basta
Affiliation:
Department of Geology, Faculty of Science, Cairo University
Z. Abdel Kader
Affiliation:
Department of Geology, Faculty of Science, Cairo University
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Summary

Optical, d.t.a., X-ray, and chemical analysis investigations were carried out on serpenttinites from various Egyptian localities and on their associated talc-carbonates. The serpentinites were proved to consist of pure antigorite, lizardite, or clinochrysotile, or of mixtures of any pair of these serpentine minerals. Lizardite, which is reported for the first time in Egypt, is found to be of common occurrence. Talc, tremolite, carbonates, chlorite, olivine, biotite, chromite, magnetite, goethite, and stevensite are the main admixtures. The talc-carbonates consist mainly of talc and magnesite, or magnesite, dolomite, and talc together with minor amounts of antigorite, magnetite, goethite, and occasionally a little chlorite or calcite. Spectrographic analyses of some of the magnetically separated serpentines have been carried out and the origin of the Egyptian serpentinites and talc-carbonates is briefly discussed.

Type
Research Article
Information
Mineralogical Magazine , Volume 37 , Issue 287 , September 1969 , pp. 394 - 408
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1969

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