The Mineralogy of Egyptian Serpentinites and Talc-Carbonates

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

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.

Mineralogical Magazine; September 1969 v. 37; no. 287; p. 394-408; DOI: 10.1180/minmag.1969.037.287.13
© 1969, The Mineralogical Society
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