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Postcollisional Ferani Volcanics from North Arabian–Nubian Shield (South Sinai, Egypt): Petrogenesis and Implication for Ediacaran (607–593 Ma) Geodynamic Evolution. The Journal of Geology, 130. 6, 475-498. https://doi.org/10.1086/724335
Faculty
Science
Year:
2022
Type of Publication:
ZU Hosted
Pages:
475-498
Authors:
AbdelAal Mohammad AbdulKarim
Staff Zu Site
Abstract In Staff Site
Journal:
The Journal of Geology university of chicago
Volume:
Keywords :
Postcollisional Ferani Volcanics from North Arabian–Nubian
Abstract:
The Ediacaran (607–593Ma) Ferani volcanic rocks are exposed in South Sinai, at the extreme northern tip of the Arabian- Nubian Shield (ANS). The studied volcanics constitute a cogenetic continuous intermediate (andesite to dacite) to acid (rhyodacite to rhyolite) lava sequence with a high-K calc-alkalinemetaluminous to slightly peraluminous nature. They contain a high concentration of large-ion lithophile elements (i.e., Ba, Rb, Pb, andTh), but lower contents ofNb, P, Ti, and Sr. They also have a general enrichment in light rare earth elements ((La=Sm)N p 2:66–4:92), compared to heavy rare earth elements ((Gd=Yb)N p 1:10–2:29), with a slightly negative Eu anomaly (Eu=Eu p 0:35–0:94). The cooling of the Feranimagma began at ∼10007–11007Cand went to ∼7007Cat lowpressure (!5.1 kbar) and shallowcrustal levels (!17km), according to thermobarometric modeling. The low degree of partial melting of the mafic lower-crustal rocks could have produced the andesitic-daciticmagmas that ascended through the crust and fractionated, leading to the production of the early intermediate Ferani lavas. Progressive fractional crystallization of the intermediate melts could consequently have formedthe rhyodacite and rhyolite melts, which were later erupted to formthe upper acidic Ferani volcanic sequence. Petrological and geochemical features support a postcollisional setting of the Ferani volcanics. Lithospheric delamination is the main geodynamic process responsible for the formation of the Ferani volcanics during the postcollisional extensional stage in the northern ANS crust.
Author Related Publications
AbdelAal Mohammad AbdulKarim, "Neoproterozoic concentric intrusive complex of gabbro-diorite-tonalite-granodiorite association, Rahaba area, southern Eastern Desert of Egypt: Implications for magm", 0024-4937/© 2021 Elsevier B.V. All rights reserved, 2021
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AbdelAal Mohammad AbdulKarim, "Petrology and geochemistry of some ophiolitic metaperidotites from the Eastern Desert of Egypt: Insights into geodynamic evolution and post-serpentinization metasomatism. Acta Geologica", https://onlinelibrary.wiley.com/journal/17556724, 2021
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AbdelAal Mohammad AbdulKarim, "Genesis of Sulfide Mineralization, Atshan and Darhib Areas, South Eastern Desert of Egypt: Evidence of Fluid Pa", © King Fahd University of Petroleum & Minerals 2021, 2021
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AbdelAal Mohammad AbdulKarim, "Petrogenesis and tectonic implications of the Maladob ring complex in the South Eastern Desert, Egypt: New insights from mineral chemistry and whole-rock geochemistry. Intern J. Earth Sci, 1", © Geologische Vereinigung e.V. (GV) 2020, 2021
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AbdelAal Mohammad AbdulKarim, "Mineralogy, chemistry and radioactivity of the heavy minerals in the black sands, along the Northern coast of Egypt. J. Afri. Earth Sci., 123, 10–20.", Journal of African Earth Sciences, 2016
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Department Related Publications
Shehta Abovendod Mohammed Hassan Eweda, "Middle Miocene Bryozo from Siwa Oasis, Western Desert, Egypt.", 5th Intern. Conf. Geology of the Arab world. Cairo Univ., vol. 3:1465-1496., 2000
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Shehta Abovendod Mohammed Hassan Eweda, "Stratigraphy, facies development and paleoecology of the Middel Miocene rocks of Mersa Matruharea, north Western Desret, Egypt.", Al Azhar Bull. Sci. vol. 6, No. 2: 2023-2043., 1995
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AbdulBaset Sabry Mohammed Mohammed, "Stratigraphy and macrofauna of the Lower Jurassic (Toarcian) Marrat Formation, central Saudi Arabia", Elsevier, 2017
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Shehta Elsayed Abdullah AbdulMajeed , "Land Cover Classification of Hail—Saudi Arabia Using Remote Sensing", http://www.scirp.org/journal/ijg/, 2012
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Aly Aly Aly Alkhdharjy, "Application of Well Logging Tool to Determine the Minerals Composition of the G Member in Abu Roash Formation, El-Razzak Oil Field, Northern Western Desert, Egypt", Austrailia, 2011
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