Zagazig University Digital Repository
Home
Thesis & Publications
All Contents
Publications
Thesis
Graduation Projects
Research Area
Research Area Reports
Search by Research Area
Universities Thesis
ACADEMIC Links
ACADEMIC RESEARCH
Zagazig University Authors
Africa Research Statistics
Google Scholar
Research Gate
Researcher ID
CrossRef
Remote sensing and geochemical investigations of sulfide-bearing metavolcanic and gabbroic rocks (Egypt): Constraints on host-rock petrogenesis and sulfide genesis
Faculty
Science
Year:
2023
Type of Publication:
ZU Hosted
Pages:
Authors:
Amr Mohamed Amin Mohamed Kamel AlAwadi
Staff Zu Site
Abstract In Staff Site
Journal:
Gondwana Research Elsevier
Volume:
Keywords :
Remote sensing , geochemical investigations , sulfide-bearing metavolcanic
Abstract:
Field geology, geochemical analyses and multi-sensor remotely sensed data of Landsat-8, ASTER and Sentinel-2 were used to detect various types of hydrothermal alteration and sulfide-gold mineralization in Neoproterozoic metavolcanic and gabbroic rocks from Darhib and El-Beida areas in the South Eastern Desert (SED) of Egypt. We also used RADAR data of Sentinel-1 using PCI Geomatica software to decipher the structural lineaments that control this mineralization. Different styles of disseminated to massive sulfide deposits include: 1) undeformed magmatic disseminated ores in Darhib gabbros, metavolcanic rocks and metabasic dykes; 2) deformed (remobilized) massive ores mostly of a magmatic-hydrothermal origin in Darhib tremolite talc rocks along E-W shear zones; 3) hydrothermal sulfide ores along El-Beida NW–SE shear zones. Cu-Zn massive ores represent the main sulfides in the Darhib silicified tremolite-talc rocks and meta-andesites, and occur as bands, veins and patches along Darhib E-W shear zones. Discontinuous occurrences of sulfide ores-bearing tremolite-talc rocks indicate that major shear zones act as structural controls on mineralization. Sulfide ores consist chiefly of chalcopyrite, sphalerite, pyrite and galena as well as minor covellite and bornite. These ores are highly concentrated along E-W striking Darhib shear zones and resulted from granite-derived hydrothermal fluids that form/and or accumulate sulfide minerals from the sulfide-bearing metavolcanic rocks around shear zones. Two stages of hydrothermal alterations are recorded in the Darhib talc mine including pre- (talcification, amphibolitization and carbonatization) and syn- (silicification and chloritization) sulfide ore alterations. Disseminated sulfide mineralization hosted in Darhib gabbros, metavolcanic rocks and metabasic dykes is of a magmatic origin, similar to Cu-Ni sulfide deposits hosted in gabbroic varieties in worldwide mafic–ultramafic intrusions. On the other hand, El-Beida gold-sulfide-bearing quartz and quartz carbonate veins are hosted in ferruginated and silicified metavolcanics/ metavolcaniclastic rocks along NW–SE shear zones (Najd Fault System trend). These are spatially associated with regional convergent structures (high-angle convergent wrench structures), suggesting orogenic gold type mineralization. The E-W with minor WNW-ESE shear zones in Darhib and NW-SE trending shear zones in El- Beida structurally controlled sulfides and gold mineralization in the SED of Egypt. El-Beida sulfide mineralization occurs as disseminated ores that consist mainly of pyrite, chalcopyrite, covelite and chalcocite with occasional occurrence of gold. The spatial occurrence of native gold in ferrigenous alteration zones indicates the role of iron in gold precipitation through buffering of gold-bearing complexes. Mineralogical and geochemical data of Darhib and El-Beida sulfide-bearing rocks indicate that they crystallized from depleted mantle sources in a back-arc basin setting, starting with the generation of arc-like volcanic rocks in a nascent BAB stage followed by the emplacement of plutonic equivalent of MORB/OIB-like rocks such as gabbroic intrusions in a mature BAB.
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
More
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
More
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
More
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
More
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
More
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
More
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
More
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
More
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
More
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
More
جامعة المنصورة
جامعة الاسكندرية
جامعة القاهرة
جامعة سوهاج
جامعة الفيوم
جامعة بنها
جامعة دمياط
جامعة بورسعيد
جامعة حلوان
جامعة السويس
شراقوة
جامعة المنيا
جامعة دمنهور
جامعة المنوفية
جامعة أسوان
جامعة جنوب الوادى
جامعة قناة السويس
جامعة عين شمس
جامعة أسيوط
جامعة كفر الشيخ
جامعة السادات
جامعة طنطا
جامعة بنى سويف