الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The Neoproterozoic rocks of northeast Africa and western Arabia are termed the Arabian Nubian Shield (ANS). These rocks were formed during the Pan-African Orogenic Cycle (850-550 Ma, Kröner and Stern, 2005). The ANS is considered as the largest tract of juvenile continental crust on Earth of the Neoproterozoic age (Patchett and Chase, 2002). Its crust comprises several tectonic terranes sutured together approximately 700–800 Ma ago (Johnson and Woldhaimanot, 2003). Fritz et al. (2013) considered the ANS as an accretion-type orogen comprising a stack of thin-skinned nappes resulting from the oblique convergence of bounding plates. The ANS was formed during a supercontinent cycle (Nance et al., 2014) bracketed by the 900–780 Ma break-up of Rodinia (Li et al., 2008) and the " ~ "650–550 Ma assembly of Gondwana concurrent with East African Orogeny (Stern, 1994; Collins and Piskarevsky, 2005; Meert and Liberman, 2004). The East African Orogen (EAO, Stern, 1994) is thus a great collision zone between East and West Gondwana (Fig. 1.1), which encompasses the ANS in the north and the Mozambique belt in the south.