“…For the Sinai Peninsula metamorphic complexes, the Pan-African metamorphic event has been explained variably with crustal thickening model (El-Bayoumi et al, 2006), heat flux due to the presence of an active magmatic arc that formed on top of subducting young lithosphere (Abu , and/or crustal extension above a forcefully intruding diapiric pluton (Reymer and Oretel, 1985;El-Gaby et al, 1991;Blasband et al, 1997Blasband et al, , 2000Brooijmans et al, 2003).…”