The Tectonic Map and Structural Provinces of the Late Neoproterozoic Egyptian Nubian Shield: Implications for Crustal Growth of the Arabian–Nubian Shield (East African Orogen)

The Late Neoproterozoic Egyptian Nubian Shield (ENS) has attracted increasing attention since the establishment of Geological Survey and Mining Authority (EGSMA (1896)), which conducted first mapping. In last three decades, rapid improvements in analytical techniques, along with field-oriented studies, have made it possible for interpretation ENS as an integral part juvenile Arabian–Nubian (ANS) a portion East African Orogen (EAO). However, consistent tectonic map does not exist. Presentation such is main objective present work where Landsat-based lithological discrimination combined systematic structural investigation careful reassessment previously published geological maps. Our this indicates that accordance previous work, basement units Eastern Desert (ED) can be divided into domains: Northern, Central, South-Eastern provinces. proposed provinces are ascribed to different plate far-field boundary conditions. earliest magmatic, metamorphic, history was set off by approximate north–south convergence Gabgaba-Gebeit, Jiddah-Asir terranes, Desert-Midyan terranes Yanbo-Onib-Sol-Hamid-Gerf-Allaqi-Heiani (YOSHGAH) suture between c. 800 620 Ma. second event 640 580 Ma correlated Nabitah Orogeny when Ad Dawadimi-Ar Rayn eastern Arabian accreted earlier consolidated arc (Afif Tathlith terranes). During period, east–west northwestern Saudi Arabia Central (CED) Egypt caused pronounced strike-slip deformation associated displacement wider Najd Fault system. third orogenic phase, younger than Ma, controlled evolution retreat Cadomian Arc. northern portions experienced extension whereas extensive post-orogenic magmatism related mantle delamination crustal thinning.