... magmatism in the Neoproterozoic Arabian Shield. This study records the first detailed geological, mineralogical and geochemical data for gabbroic intrusions located in the Gabal Samra and Gabal Abd areas of the Hail region in the Arabian Shield of Saudi Arabia. Geological field relations and investigations...

...Mohamed Abd El-Wahed; Mohamed Attia Transpressional deformation had a key role during the Neoproterozoic development of the East African Orogenic Belt and the Arabian–Nubian Shield. This study examined the folding structures in the Kharit Shear Zone (KSZ) in the southern Eastern Desert of Egypt. We...

... the bulk chemical composition of serpentinites. Their metasomatic equivalents indicate a dunite-peridotite parentage ( Surour, 1993 ; Abd El-Rahman et al., 2009 ; Abdel-Karim et al., 2018 ), as indicated, for example, by the least metasomatised proximal variety (sample # GHC1) at the Gabal Ghadir...

... granites were affected by Na- and K-metasomatism. Pegmatite dykes cut alkali feldspar granites at Gabal El-Faliq with NW–SE and NE–SW trends ( Khedr et al. 2022 ). Alkali feldspar granite (AD1), garnet-bearing syenogranite (AD29) and garnet-bearing granodiorite (AD30; Supplementary Table S1 ) were...

...Mamdouh F. Soliman Abstract In a detailed investigation of the sedimentology, mineralogy and trace element geochemistry of the stratigraphic interval spanning the Paleocene/Eocene (P/E) boundary in the Gabal el-Qreiya section, the author attempts to reconstruct environmental changes across...

... Egypt, support the proposal that the tectonic set up in this area controls to a great extent the course of the Nile and its valley ( Hume 1910 ; Abd El-Razik and Razvaliev 1972), thus reflecting the predominant fracture trends in the neighborhood. In the area between Aswan and Idfu the longitudinal...

... among relict primary minerals. Massive and schistose serpentinized peridotites of Neoproterozoic age outcrop at Gabal Sirsir, South Eastern Desert, Egypt (northwestern corner of the Arabian-Nubian Shield or ANS). Petrography, bulk composition, and mineral chemistry are all consistent with a strongly...

...Mohamed Abd El Monsef; Amr Abdelnasser Abstract The Haimur area represents the central part of the Wadi Allaqi region in the southern block of the Egyptian Eastern Desert near Nasser Lake and the Nile valley. It is made up of ophiolitic assemblage comprising serpentinite and talc carbonate...

...Bassam A. Abuamarah Abstract Late Neoproterozoic mafic-ultramafic rocks exposed in the Gabal Um Selim–Zeiatit area, northernmost Arabian-Nubian Shield include an old ophiolite sequence and a young mafic-ultramafic intrusion. The ophiolite sequence is represented by serpentinized peridotite...

... to the Early Cretaceous of northern Egypt are: Saad & Ghazaly ( 1976 ), Sultan ( 1978 , 1987 ), Abou Ela ( 1979 ), Abdelmalik et al. ( 1981 ), Sultan & Aly ( 1986 ), El-Shamma & Arafa ( 1992 ), Mahmoud ( 1991 ), Omran et al. ( 1990 ), Abd El-Shafy & Abd El Moneim ( 1991 ), Soliman et al...

... and pressures of 3–5 kbar ( Abu El-Enen et al. , 2004 ). The Feiran-Solaf complex is a medium- to high-grade terrane comprising gneiss, migmatized gneiss, metapelitic and metapsammitic schist and calc-silicate rock ( El-Gaby and Ahmed 1980 ; El-Tokhi, 1990 ; El-Shafei and Kusky, 2003 ; Abd El-Shakour...

... ( Fig. 1 ), that show close spatial relationships with major faults or fault zones in the Eastern Desert of Egypt [ Abd-El Naby, et al., 2000 ; Ali et al., 2012 , Masoud and Shahin, 2015 ]. Fig. 1. a – location map of Humr Akarim (HA) granite pluton; b – the satellite image shows the study...

... Ploeg, 1953 ; Awad and Fawzi, 1956 ; Fawzi, 1960 , 1963 ; Awad, 1961 ; Abdallah et al., 1965 ) and benthic foraminifera ( Abd-Elshafy and Abd El-Azeam, 2010 ). In the west-central part of the Sinai Peninsula, the Malha Formation has been dated palynologically as Jurassic ( Sultan, 1985...

... phases ( White, 1970 ; Baldo & Bradt, 1988 ; Serry et al. , 1993 ; Kappmeyer, 1966 ; Fonseca et al. , 1998 ; Serry & Abd El-Moemen, 2011 ). When zircon (ZrSiO 4 ) is added to the MgO-CaO phases at CaO/SiO 2 molar ratios of more than 3.0, tri-calcium silicate (C 3 S) and Ca-alumino...

...Mohamed Abd El-Wahed; Mahmoud Ashmawy; Hossam Tawfik Abstract We examine the evolution of the northwestern Red Sea, Egypt, by study of the Quseir–Umm Gheig subbasin. The subbasin records two main tectonic events. The first event is related to development of Late Cretaceous synclinal basins due...

...); 16. Um Desi (Mo). (d) Simplified geological map showing location of the Abu Kharif area between the two mega-shear zones Qena–Safaga and W Fatira El Zarqa (modified after Abd El-Wahed and Abu Anbar, 2009 ). Stern and Hedge ( 1985 ) subdivided the Eastern Desert into three terranes...

...Mohamed A. Abd El-Wahed; Samir Z. Kamh Abstract The deformation in the central part of Al Jabal Al Akhdar, NE Libya, is dominated by E-W right-lateral strike-slip fault zones that form a conjugate system with the N-S left-lateral strike-slip faulting. The dextral wrench-dominated transpression...

...Mokhles K. Azer; Adel A. Surour; Ahmed A. Madani; Minghua Ren; Ahmed A. Abd El-Fatah Abstract In this work, we present new field observations, geochemical data, mineral chemistry, and interpretations from the late Neoproterozoic El-Bakriya mafic intrusion in the central Eastern Desert of Egypt...