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Geological studies of the Umm UD gold prospect, Eastern Desert, Egypt / Youssry Mohamed Mohamed Esmail ; Supervised Mohamed A. Elsharkawi

By: Contributor(s): Material type: TextTextLanguage: English Publication details: Cairo : Youssry Mohamed Mohamed Esmail , 2020Description: 104 P. : ill. ; 25cmOther title:
  • الدراسات الجيولوجية لمنطقة تواجد ذهب أم عود الصحراء الشرقية : مصر [Added title page title]
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Dissertation note: Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Geology Summary: The present study considers the basement rock units and the mineralized zones incorporated in one o f the old gold mine (Umm Ud) in the Eastern Desert o f Egypt. The study area lies between latitudes 24{u00B0}48'00" and 24{u00B0}50'00" N and longitudes 34{u00B0}40'30" and 34{u00B0}44'30". This study aims at investigating the rock units and mineralized veins in the study area in terms o f petrography, opaque mineralogy, geochemistry, gold content as well as discussing the possible origin o f the mineralization. The study revealed that the main rock units encountered are the ophiolitic serpentinites and related rocks, the island arc metavolcanics and metavolcaniclastic rocks and the subduction-related (G1) granitoid rocks (diorite/ quartz diorite). Geochemical investigation indicated that the studied serpentinites are mainly o f parent lherzolite composition and similar in many aspects to the ophiolitic serpentinites found in many areas in the Eastern Desert o f Egypt. The studied metabasalts and metatuffs are calc-alkaline to tholeiitic. They belong to the island arc assemblage as indicated by the tectonic setting diagrams used in the study. The intrusive dioritic rocks show a calc-alkaline affinity and plot in the volcanic arc-syn-collision granite field. The mineralized quartz veins show relatively high content o f Cr and Ni (up to 186 ppm and 115 ppm respectively) and contain gold (up to 11.65 ppm). which is either found as inclusions in sulfides (mainly pyrite) or as a very minute free native crystals as indicated by the SEM and EDX analyses. The possible genesis o f gold in the study area can be explained by the effect o f the dioritic intrusion as a heat engine that led to the mobilization and leaching o f gold (and other elements) from the surrounding ophiolitic and island arc rocks and their deposition in the hydrothermal quartz veins and alteration zones connected with the dioritic intrusion
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Thesis Thesis قاعة الرسائل الجامعية - الدور الاول المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.15.M.Sc.2020.Yo.G (Browse shelf(Opens below)) Not for loan 01010110082641000
CD - Rom CD - Rom مخـــزن الرســائل الجـــامعية - البدروم المكتبة المركزبة الجديدة - جامعة القاهرة Cai01.12.15.M.Sc.2020.Yo.G (Browse shelf(Opens below)) 82641.CD Not for loan 01020110082641000
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Cai01.12.15.M.Sc.2020.Ra.D Depositional architectures and structural control on the upper pliocene reservoirs of Kafr Elsheikh formation, Seinna field, West Nile Delta / Cai01.12.15.M.Sc.2020.Sa.A Applications of remote sensing in geological mapping of hydrothermal alteration zones, radioactive potentialities and hazards at Wadi Fatirah area, North Eastern Desert, Egypt / Cai01.12.15.M.Sc.2020.Sa.A Applications of remote sensing in geological mapping of hydrothermal alteration zones, radioactive potentialities and hazards at Wadi Fatirah area, North Eastern Desert, Egypt / Cai01.12.15.M.Sc.2020.Yo.G Geological studies of the Umm UD gold prospect, Eastern Desert, Egypt / Cai01.12.15.M.Sc.2020.Yo.G Geological studies of the Umm UD gold prospect, Eastern Desert, Egypt / Cai01.12.15.M.Sc.2021.Az.I Investigating the shape evolution of neogene rift-related volcanics via facies analysis and surface texture characteristics : An example from Bahariya Depression, Western Desert, Egypt / Cai01.12.15.M.Sc.2021.Az.I Investigating the shape evolution of neogene rift-related volcanics via facies analysis and surface texture characteristics : An example from Bahariya Depression, Western Desert, Egypt /

Thesis (M.Sc.) - Cairo University - Faculty of Science - Department of Geology

The present study considers the basement rock units and the mineralized zones incorporated in one o f the old gold mine (Umm Ud) in the Eastern Desert o f Egypt. The study area lies between latitudes 24{u00B0}48'00" and 24{u00B0}50'00" N and longitudes 34{u00B0}40'30" and 34{u00B0}44'30". This study aims at investigating the rock units and mineralized veins in the study area in terms o f petrography, opaque mineralogy, geochemistry, gold content as well as discussing the possible origin o f the mineralization. The study revealed that the main rock units encountered are the ophiolitic serpentinites and related rocks, the island arc metavolcanics and metavolcaniclastic rocks and the subduction-related (G1) granitoid rocks (diorite/ quartz diorite). Geochemical investigation indicated that the studied serpentinites are mainly o f parent lherzolite composition and similar in many aspects to the ophiolitic serpentinites found in many areas in the Eastern Desert o f Egypt. The studied metabasalts and metatuffs are calc-alkaline to tholeiitic. They belong to the island arc assemblage as indicated by the tectonic setting diagrams used in the study. The intrusive dioritic rocks show a calc-alkaline affinity and plot in the volcanic arc-syn-collision granite field. The mineralized quartz veins show relatively high content o f Cr and Ni (up to 186 ppm and 115 ppm respectively) and contain gold (up to 11.65 ppm). which is either found as inclusions in sulfides (mainly pyrite) or as a very minute free native crystals as indicated by the SEM and EDX analyses. The possible genesis o f gold in the study area can be explained by the effect o f the dioritic intrusion as a heat engine that led to the mobilization and leaching o f gold (and other elements) from the surrounding ophiolitic and island arc rocks and their deposition in the hydrothermal quartz veins and alteration zones connected with the dioritic intrusion

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