Two orogenies in the Meatiq area of the Central Eastern Desert, Egypt

Gravitational collapse origin of shear zones, foliations and linear structures in the Neoproterozoic cover nappes, Eastern Desert, Egypt

“…3f) and lineations L m indicating that hornblende crystallization temperatures existed during ductile shearing. Our results agree with those of Ries et al (1983), Habib et al (1985) and Neumayr et al (1996) in finding that amphibolite facies conditions existed in the melange adjacent to the MCC. …”

“…2b with the results of Fowler and Osman (2001) for the Um Had area to the west, and the profile shown by Habib et al (1985) for the MCC to the east, allows the construction of the profile shown in Fig. 8.…”

“…Recent tectonic models for the evolution of the Eastern Desert have concentrated on the origin, significance and mechanism of formation of several gneisscored dome structures (Wadi Kid, Meatiq, Um Had, Gebel El-Sibai, Gebel Um El-Shalul, Hafafit), with the characteristics of metamorphic core complexes (Sturchio et al, 1983a,b;El Ramly et al, 1984;Habib et al, 1985;Bennett and Mosley, 1987;El-Gaby et al, 1990;Greiling et al, 1993;Wallbrecher et al, 1993;Kr€ oner et al, 1994;Greiling, 1997;Neumayr et al, 1998;Blasband et al, 2000;Fowler and Osman, 2001;Loizenbauer et al, 2001;Fritz et al, 2002).…”

“…The gneissic rocks of the core complexes are separated from low-grade metamorphosed upper crustal rocks by low-angle mylonitic shear zones (Sturchio et al, 1983a,b;Ries et al, 1983;Habib et al, 1985;Blasband et al, 2000). Transcurrent ductile shear zones and normal ductile shear zones framing the core complexes have also been included in models for Eastern Desert core complex exhumation involving strain partitioning between Ôinternal' and Ôexternal' parts of the orogen Fritz and Puhl, 1996;Neumayr et al, 1998;Fritz et al, 2000).…”

Age and tectonic setting of granitoid gneisses in the Eastern Desert of Egypt and south-west Sinai

“…These occur in antiformal, 'domal' positions, generally surrounded by lower grade supracrustal assemblages (see summary in Greiling et al, 1994). In the ED such rocks occur at Meatiq (Sturchio et al, 1983;E1-Gaby et al, 1984;Habib et al, 1985;Bennet and Mosley 1987), in three distinct domal structures at Hafafit (Greiling and ElRarely, 1990;Rashwan, 1991) and in the region along Wadis Bitan and Haimut (Geological Map 1:500 000, sheet NF 36 NE Bernice, Technische Fachhochschule Berlin 1987). In south-western Sinai similar rocks occur in the Wadi Feiran region (E1-Gaby and Ahmed, 1980;Shimron, 1980).…”