Minghua, R.

Sadek Ghabrial, Doris

English

Sadek Ghabrial Doris

Minghua R.

University of Szeged

Acta Mineralogica-Petrographica, Abstract Series, Szeged, Vol. 7, 2012 121 Joint 5th Mineral Sciences in the Carpathians Conference and 3rd Central-European Mineralogical Conference 20–21 April, 2012, University of Miskolc, Miskolc, Hungary METAMORPHIC HISTORY OF LATE NEOPROTEROZOIC DOKHAN-TYPE VOLCANICS IN THE MEKNAS AREA, SE SINAI, EGYPT  SADEK GHABRIAL, D.1 Department of Geological Science, National Research Centre, Egypt  1* & MINGHUA, R.2 2 Department of Geological Sciences, University of Texas, USA * E-mail: dghabrial@hotmail.com  The mineralogical and metamorphic features of the Neoproterozoic Meknas volcanics in south-eastern Sinai, Egypt, have been studied. These volcanics developed during the late stage of the Pan-African event and occur as successive sheets ranging in composition from andesite to rhyolite. Their mineral assemblages and mineral chemistry indicate these rocks underwent two metamorphic phases. The first is an early contact phase, which is characterized by the assemblage actinolitic hornblende + hornblende + biotite + oligoclase + quartz suggesting amphibolite facies metamorphism, with P-T conditions at 550±50°C and <2–3 kbar. This metamorphism was followed by a late hydrothermal phase under greenschist and sub-greenschist facies conditions as evidenced by formation of actinolite + chlorite + albite in andesite and dacite and chlorite + muscovite in rhyodacite and rhyolite.     

Metamorphic history of late neoproterozoic dokhan-type volcanics in the Meknas area, se Sinai, Egypt

http://acta.bibl.u-szeged.hu/33054/1/mineralogica_as_007_121.pdf

Metamorphic history of late neoproterozoic dokhan-type volcanics in the Meknas area, se Sinai, Egypt

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