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Genesis of Sulfide Mineralization, Atshan and Darhib Areas, South Eastern Desert of Egypt: Evidence of Fluid Pathway Effects Along Shear Zones
Faculty
Science
Year:
2021
Type of Publication:
ZU Hosted
Pages:
641–665
Authors:
Amr Mohamed Amin Mohamed Kamel AlAwadi
Staff Zu Site
Abstract In Staff Site
Journal:
Arabian Journal for Science and Engineering Springer
Volume:
Keywords :
Genesis , Sulfide Mineralization, Atshan , Darhib Areas,
Abstract:
The studied sulfide mineralizations of Atshan and Darhib areas are related to the south Eastern Desert shear zones. They are hosted in talc- and tremolite-talc-rich rocks and also in meta-basaltic dykes and quartz-veins. The principal mineralization in Atshan includes sphalerite, pyrite, chalcopyrite, galena and pyrrhotite, whereas that in Darhib comprises chalcopyrite, sphalerite, pyrite, and galena with subordinate bornite and covellite. Darhib mineralization contains traces of altaite and electrum. Altaite has the highest Te concentrations suggesting crystallization under low fS2 and/or high fTe2 conditions, probably due to S budget consumption from the hydrothermal fluids in the late stage of deposition. Electrum has the highest Au contents with gold fineness value falling within the range of epithermal Au–Ag deposits. The dominance of recrystallized and replacement textures in the studied mineralizations suggests a secondary or post-depositional metamorphic overprint. The significant Cd contents in sphalerite from remobilized massive mineralizations hosted in tremolite-talc-rich rocks indicate crystallization at ~250–300 °C. Galena hosted in tremolite-talc-rich rocks is characterized by exceptionally high selenium and tellurium contents, indicating its generation from relatively Se–Te-enriched hydrothermal fluids. Pyrrhotite hosted in quartz-veins from Atshan was formed under lower sulfur activity (aS2) and oxygen fugacity (fO2). Covellite and bornite were formed due to chalcopyrite oxidation, revealing a role of supergene process. Shear zones, possibly produced during later thrust faulting, were acted as channel ways for hydrothermal mineralizing fluids that may have modified and/or precipitated the mineralization. Mineralizing fluids have probably resulted from dehydration during metamorphism and/or late-magmatic fluids from nearby granitic intrusions.
Author Related Publications
Amr Mohamed Amin Mohamed Kamel AlAwadi, "Mineral chemistry, geochemistry, Raman spectroscopy and geotectonic significance of Neoproterozoic ophiolitic peridotites and pyroxenites from Kab Amiri district, central Eastern Desert, Egypt", Faculty of Science, Suez University, 2020
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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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Department Related Publications
Osama Mohamed Abdelmoneim Elbadry, "El-Badry, O. Abul Enein & Moursi, : Surface Triassic of Arif El Naga, Sinai, Egypt: A Petrologic study: M.E.R.C., Ain ¬Shams Univ., Earth Sci. Ser., V. 11, p. 51 67. (1997)", لايوجد, 1900
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Osama Mohamed Abdelmoneim Elbadry, "Gadallah, Abdel-Shafi, Abdel Razek, and El-Badry, O. : “Reservoir Evaluation of Nukhul Clastics, South Gulf of Suez, Egypt”. GRMENA-1, First International Conference on Georesources in the Middle East and North Africa. (2005).", لايوجد, 1900
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Osama Mohamed Abdelmoneim Elbadry, "Hassaan, El-Badry, O. Atawiyaa & Zalat, : Sedimentology and Chemistry of Eocene Rocks, Maadi Area, Egypt : Science Research Series, Ain Shams Univ., Cairo, V. IV. (1984)", لايوجد, 1900
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Osama Mohamed Abdelmoneim Elbadry, "El Badry, O. & Ayioub : Hammarn Faraon carbonate sedimentation, Shoab Ali Field, Egypt: Isotopic and petrographic study : Sedimentology of Egypt, V. 4, p. 75 87. (1996)", لايوجد, 1900
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Osama Mohamed Abdelmoneim Elbadry, "El-Badry, O. Kamel & Marie, : Petrography, depositional history and physico mechanical properties of some evaporites, Ras Malaab, Gulf of Suez, Egypt : Bull. Fac. Sci., Zagazig Univ., V. 18, p. 199 223. (1996)", لايوجد, 1900
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