An unusual carbonate mineral from the schists of Wadi Um Kabu, South Eastern Desert, Egypt

El Sokkary A. A.: An unusual carbonate mineral from the schists of Wadi Um Kabu, South Eastern Desert, Egypt. In: Acta mineralogica-petrographica, (25) 2. pp. 197-201. (1982)

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Abstract

An unusual carbonate mineral is associated with the schists of Wadi Um Kabu in the South Eastern Desert of Egypt. It is subjected here to detailed mineralogical and chemical studies. It is revealed that the brownish and rhombic carbonate material under study is composed of: dolomite with MgO partly replacing CaO and the mineral retaining the structure of its predecessor ferroan dolomite, calcite, goethite which is amorphous to poorly crystalline and possible brucite. It is suggested that the former ferroan dolomite was subjected to a thermal metamorphic pulse by means of which major part of Fe and some Ca and Mg were exuded while] the original ferroan dolomite is modified in chemical composition to the present dolomite. The expelled elements formed goethite, calcite and brucite, respectively. Both the dolomites and their schistose country rocks underwent differential mobilization of the three cations: Fe, Ca and Mg under thermal metamorphic environment.

Item Type: Article
Journal or Publication Title: Acta mineralogica-petrographica
Date: 1982
Volume: 25
Number: 2
ISSN: 0365-8066
Page Range: pp. 197-201
Language: English
Publisher: University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Place of Publication: Szeged
Related URLs: http://acta.bibl.u-szeged.hu/39402/
Uncontrolled Keywords: Kőzettan, Ásványtan, Földtan
Additional Information: Bibliogr.: 201. p. ; összefoglalás angol nyelven
Subjects: 01. Natural sciences
01. Natural sciences > 01.05. Earth and related environmental sciences
Date Deposited: 2016. Oct. 17. 09:25
Last Modified: 2022. Jul. 25. 15:48
URI: http://acta.bibl.u-szeged.hu/id/eprint/24701

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