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Mineral chemistry, geochemistry, Raman spectroscopy and geotectonic significance of Neoproterozoic ophiolitic peridotites and pyroxenites from Kab Amiri district, central Eastern Desert, Egypt
Faculty
Science
Year:
2020
Type of Publication:
ZU Hosted
Pages:
Authors:
Amr Mohamed Amin Mohamed Kamel AlAwadi
Staff Zu Site
Abstract In Staff Site
Journal:
Frontiers in Scientific Research and Technology Faculty of Science, Suez University
Volume:
Keywords :
Mineral chemistry, geochemistry, Raman spectroscopy , geotectonic
Abstract:
The small gold mining Kab Amiri district ultramafic ophiolitic section (central Eastern Desert) comprises highly serpentinized peridotites (serpentinites) and few pyroxenites. It lies within a region of Neoproterozoic ophiolitic rocks and associated derivatives. The chromian spinel textural and chemical compositional features suggest transitional greenschist-amphibolite up to lower amphibolite facies metamorphism and indicates that they represent highly-depleted mantle residues. The presence of the Si-Ob-Si antisymmetric ν1(A1), symmetric ν2(A1) bands and the hydroxyl group (OH) modes are conclusive for the discrimination of antigorite. Furthermore, the speculation of serpentines as antigorite can also be indicated from the hydroxyl group modes. The Kab Amiri ophiolite suite (central Eastern Desert) represents fragments of oceanic lithosphere that are developed in forearc setting in a supra-subduction zone (SSZ) environment. Thus the low TiO2 contents, the enrichment in LILE and LREE and the Nb depletion reflect the remelting of a highly depleted mantle source and suggest their formation in a SSZ environment (i.e forearc).
Author Related Publications
Amr Mohamed Amin Mohamed Kamel AlAwadi, "Styles of Fe–Ti–V ore deposits in the Neoproterozoic layered mafic-ultramafic intrusions, south Eastern Desert of Egypt: Evidence for fractional crystallization of V-rich melts", Elsevier, 2022
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Amr Mohamed Amin Mohamed Kamel AlAwadi, "Remote sensing and geochemical investigations of sulfide-bearing metavolcanic and gabbroic rocks (Egypt): Constraints on host-rock petrogenesis and sulfide genesis", Elsevier, 2023
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Amr Mohamed Amin Mohamed Kamel AlAwadi, "Petrogenesis of Gerf Neoproterozoic carbonatized peridotites (Egypt): Evidence of convergent margin metasomatism of depleted sub-arc mantle", Elsevier, 2023
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Amr Mohamed Amin Mohamed Kamel AlAwadi, "Geochemical, mineralogical and petrogenetic studies of the calc-alkaline younger gabbros, Sinai of Egypt with a special emphasis on the role of hydrous fluids", Elsevier, 2019
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Amr Mohamed Amin Mohamed Kamel AlAwadi, "Petrogenesis of the ~740 Korab Kansi mafic-ultramafic intrusion, South Eastern Desert of Egypt: Evidence of Ti-rich ferropicritic magmatism", ELSVIER, 2020
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Department Related Publications
Osama Mohamed Abdelmoneim Elbadry, "El-Badry, O. : Nature of the Pilo Pleistocene rocks, Wadi El Jurafi, East Central Sinai, Egypt : Bull. Fac. Sci., Zagazig Univ., V. 17, p. 121 139. (1995)", لايوجد, 1900
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Osama Mohamed Abdelmoneim Elbadry, "El-Badry, O. Hasanein & El Shafi, : Lithostratigraphy of the Jurassic Rocks, Western side of the Gulf of Suez, Egypt: Bull. Fac. Sci., Zagazig Univ., V. 4, p. 125 145. (1982)", لايوجد, 1900
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Osama Mohamed Abdelmoneim Elbadry, "El-Badry, O. & Ramadan : Sedimentology of the bottom sediment of Suez Canal, Egypt: Bull. Fac. Sci., Zagazig Univ., V. 9, p. 149 189. (1987)", لايوجد, 1900
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Osama Mohamed Abdelmoneim Elbadry, "Hassaan, El Amin & El-Badry, O. : Panning Survey for Tungsten Minerals in Abu Kharif Area, Eastern Desert, Egypt : Aswan Sci. Tech. Bull. Vol. 2, p. 51 74. (1980)", لايوجد, 1900
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Samir Mahmoud Ahmed Zaid, "دراسة امكانية حدوث سيول لاحواض الصرف السطحي لمنطقة سفاجا– مصر.", لايوجد, 1900
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