Lu–Hf and O isotopic compositions on single zircons from the North Eastern Desert of Egypt, Arabian–Nubian Shield: Implications for crustal evolution

Laser Ablation Inductively Coupled Plasma Mass Spectrometry U-Pb Dating of Detrital and Magmatic Zircons of Glacial Diamictites and Pebbles in Late Ordovician Sediments of the Taurides and Southeast Anatolian Autochthon Belt, Turkey: Indications for Their Arabian-Nubian Provenance

“…Lack of pre-Tonian inherited zircons in the sample and A-type geochemical features of the studied granitic pebble also support the idea that it might be derived from mantle or mafic lower-crustal sources, as in the equivalent intrusions in the KP (Katzir et al 2007;Moreno et al 2012) and the North Eastern Desert (Moussa et al 2008). The newly published Hf/Lu isotopic study (Ali et al 2016) of the alkali granitic rocks in the North Eastern Desert (Abu Harba, Gattar, and A. Missikat) support that A-type granites were generated from juvenile Neoproterozoic mantle source and then were assimilated with just Neoproterozoic materials, as in sample DPK72. The penetrative deformation and metamorphism in the Sinai Peninsula had mainly ceased between 625 and 635 Ma (Be'eri-Shlevin et al 2009), but important mega-shear zones, such as the Nugrus/Najd shear zones in the Nubian part of the ANS and the Qazaz-Ajjaj shear zone in the Arabian part of the ANS, were documented for the southern part of the ANS during the time span 630-570 Ma (e.g., Johnson et al 2011;Meyer et al 2014;Hassan et al 2016).…”

“…The crystallization ages of the alkaline/peralkaline granitic intrusions in the Katerina Pluton (KP) within the Katerina Ring Complex in central Sinai Peninsula, the North Eastern Desert (Gattar, Abu Harba, Missikat), and the Jabal Sayad Complex (Hijaz) were determined to be 596 5 6.0 Ma (KP), 593 5 2 Ma (KP), 605 5 3.0 Ma (Gattar), 595 5 3.0 Ma (Abu Harba), 597 5 7.0 Ma (Missikat), and 593 5 16 Ma (Katzir et al 2007;Moussa et al 2008;Moreno et al 2012;Moghazi et al 2015;Ali et al 2016). The geochemical patterns of DPK72 have greater similarities with the alkaline granites formed in the Katerina Ring Complex (Katzir et al 2007;Moreno et al 2014) and the North Eastern Desert (Moussa et al 2008;Ali et al 2016) than they do with those formed in the Jabal Sayad Complex in Hijaz (Moghazi et al 2015). Lack of pre-Tonian inherited zircons in the sample and A-type geochemical features of the studied granitic pebble also support the idea that it might be derived from mantle or mafic lower-crustal sources, as in the equivalent intrusions in the KP (Katzir et al 2007;Moreno et al 2012) and the North Eastern Desert (Moussa et al 2008).…”

Geochemistry and Tectonic Setting of Neoproterozoic Rocks from the Arabian-Nubian Shield: Emphasis on the Eastern Desert of Egypt

“…The Aswan Tonalite and the monumental granite intruded at 606 Ma, respectively [38]; younger granites covers a time span between 600 and 550 Ma, [6]; A-type granites dated ca. $600 Ma [81]; 590 AE 3.…”

“…Some alkaline A-type granites in the NED of Egypt (Al-Missikat, Abu Harba, and Gattar) dated ca. $600 Ma [81]. Available isochron Rb▬Sr ages of alkaline granites are from Sinai fall in the range 550-600 Ma [82].…”

Spatial Distributions and Risk Assessment of the Natural Radionuclides in the Granitic Rocks from the Eastern Desert, Egypt

“…El-Qattar is composed mainly of younger granite, metavolcanics, Hammamat sediments, and grey granites. The geology of the area was described in previous investigations [16][17][18][19][20]. The youngest granite cuts all the older cited units.…”