http://www.sciencedirect.com/science/article/pii/S167498711100048X |
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| Authors: | Ibrahim H Khalifa Mohammed Z El-Bialy Doa'a M Hassan |
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| Institution: | 1. Geology Department, Faculty of Science, Suez Canal University, Ismailia 41522, Egypt
2. Geology Department, Faculty of Science, Port Said University, Port Said, Egypt |
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| Abstract: | Metavolcanic rocks hosting base metal sulphide mineralization, and belonging to the Kid
Metamorphic Complex, are exposed in the Samra-Tarr area, Southern Sinai. The rocks consist of slightly
metamorphosed varicolored porphyritic lavas of rhyolite-to-andesite composition, and their equivalent
pyroclastics. Geochemically, these metavolcanics are classified as high-K calc-alkaline, metaluminous
andesites, trachyandesites, dacites, and rhyolites. The geochemical characteristics of these metavolcanics
strongly point to their derivation from continental crust in an active continental margin. The sulphide
mineralization in these metavolcanics occurs in two major ore zones, and is represented by four distinct
styles of mineralization. The mineralization occurs either as low-grade disseminations or as small
massive pockets. The associated hydrothermal alterations include carbonatization, silicification, sericitization
and argillic alterations. The base metal sulphide mineralization is epigenetic and was formed by
hydrothermal solutions associated with subduction-related volcanic activity. |
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| Keywords: | Calc-alkaline Sulphides Mineralization Metavolcanic rocks Sinai |
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