Tectonic evolution and setting of the Sa’al Complex, southern Sinai, Egypt: A Proterozoic continental back-arc rift model

Tonian–Ediacaran Tectonometamorphic History of the Sa'al Complex, Sinai (Egypt): Implications for the Tectonostratigraphic Framework of the Northern Arabian–Nubian Shield

“…They estimated at least 50% vertical shortening in the well-foliated Ra'ayan phyllites, i.e., an extensional event. In summary, Fowler et al (2015) argued against thrusting and an extensional tectonic regime as accounting for D 1 , based on: a) vertical shortening, b) dominance of symmetrically-folded quartz veins with S 1 as an axial plane structure, c) symmetrical pull-apart structures in competent phenocrysts and d) symmetrical pressure shadows developed in resistant particles enclosed by S 1 .…”

Autochthonous origin of the Encruzilhada Block, Dom Feliciano Belt, southern Brazil, based on aerogeophysics, image analysis and PT-paths

“…Many authors consider such conditions suggestive of an attenuated precollisional lithosphere with high sub-lithospheric mantle heat influx (Harris and Holland, 1984;Thompson et al, 2001;Clark et al, 2011;Fowler et al, 2015;Hyndman et al, 2015).…”

“…As pointed out by Kelsey and Hand (2011), high-T/low-P conditions are not expected for an overthickened lithosphere. Collision and tickening of a previously extended crust is assumed to account for the combination of high geothermal gradients and gently dipping contractional structures (Harris and Holland, 1984;Thompson et al, 2001;Clark et al, 2011;Fowler et al, 2015). A sequence of tectonic pull and push is expected when collision follows the opening of a rift or back-arc rift (Lister and Foster, 2009;Fowler et al, 2015).…”

“…Collision and tickening of a previously extended crust is assumed to account for the combination of high geothermal gradients and gently dipping contractional structures (Harris and Holland, 1984;Thompson et al, 2001;Clark et al, 2011;Fowler et al, 2015). A sequence of tectonic pull and push is expected when collision follows the opening of a rift or back-arc rift (Lister and Foster, 2009;Fowler et al, 2015). Recent models for the Musgrave Orogeny (central Australia) by Gorczyk and Vogt (2015) suggest that lithospheric delamination occured during contraction of previously weakened domains limited by cratonic blocks in an intracontinental setting, causing anomalously high geothermal heat flux distant from active plate boundaries.…”

Geochemical Constraints of the Ediacaran Volcano‐Sedimentary Succession of the Sa'al Metamorphic Complex at Wadi Zaghra, South Sinai, Egypt

“…Most of the previous authors mentioned that the conglomerates were folded, metamorphosed under greenschist facies conditions, and subjected to deformation. Hassan et al (2014) and Fowler et al (2015) suggested that the whole Sa'al complex represents a low-grade metamorphosed and poly-deformed sequence, and that the earlier stage of metamorphism and deformation occurred during the breakup of Rodinia at a late Mesoproterozoic age. This assumption contradicts field observations and recent dating, as there is a time gap of ~400 Ma between the oldest two formations (Ra'ayan and Agramyia) and the Zaghra Formation (cf.…”