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Neoproterozoic juvenile crust is exposed in the Eastern Desert of Egypt, between the Nile and the Red Sea, forming the basement to Cambrian and younger sedimentary strata in the northernmost part of the Arabian–Nubian Shield (ANS). In order to reveal how the crust of this vast region was formed, four examples of widespread Neoproterozoic (653–595Ma) calc-alkaline and alkaline intrusive rocks in the...
The volcano-sedimentary succession at Wadi Rutig, Sinai, at the northernmost segment of the Arabian Nubian Shield comprises early Ediacaran volcanic rocks interbedded with immature sediments including variable sized conglomerates, sandstones and siltstones. We report new SIMS U–Pb ages of zircons separated from conglomerates of various levels in the succession and from single cobbles of these conglomerates...
New geochemical, Nd-isotope and U–Pb zircon data from Neoproterozoic volcanic rocks from Wadi Sawawin in northwestern Saudi Arabia provide important constraints on the evolution of the crust in this part of the Arabian–Nubian Shield (ANS). The Ghawjah volcanic rocks range from tholeiitic to calc-alkaline and are metamorphosed to greenschist facies. U–Pb zircon analyses for Ghawjah andesite yield a...
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