The Pan-African Nonmetallic Mineral Deposits of Egypt: Genetic and Exploration Constraints

Abdalla, Hamdy M.; Saleh, Gehad M.

doi:10.1007/978-3-030-49771-2_22

Cited by 2 publications

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“…The composition of Palaeozoic and Mesozoic volcanic rocks ranges from olivine basalt to trachyte, whereas tertiary volcanic formations are mostly basaltic. There have been numerous prior research on these alkaline volcanic systems conducted by (Heikal 2003; Dawood et al 2003; Saleh et al 2004, 2007, 2015, 2020, 2021; Ibrahim et al 2005; Abdalla 2001; El Tohamy 2011; Gharib et al 2012; Nabawy and El Sharawy 2018; Sadek et al 2020; Sallam et al 2021; Abuamarah and Nabawy 2021; Kamar et al 2022; Oraby et al 2022; Ali-Bik et al 2022; Abdalla et al 2023; Dessouky and Ali 2018; Dessouky et al, 2023; Khaleal et al 2022, 2023).…”

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confidence: 99%

Petrogenesis and geological implications of the trachytic rocks in the South Eastern Desert, Egypt: Mineralogical, geochemical, and radioactivity insights

Saleh,

Mohamed,

El Tohamy

2023

Applied Earth Science: Transactions of the Institutions of Mini

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The investigated Phanerozoic volcanic (Gabal Um Itly, G. El Beida, G. Um Domi and G. Um Doweila) areas in the south Eastern Desert of Egypt of the Northern Arabian-Nubian Shield (ANS), have been a peralkaline affinity and display a continuous composition trachyte rocks. Geochemically, the studied rocks show significant negative anomalies in Ba, Sr, and Ti on the primitive mantle normalized trace element plot, indicating an ancestry involving plagioclase and Fe-Ti oxide fractionation. The concentrations of uranium mineralization and rare earth elements in the trachyte rocks is related to the presence of uranophane, kasolite, umohoite, autunite, monazite and allanite. The distribution of uranium, thorium and their ratios in the trachyte rocks reflects a direct strong relation, which suggests that U distribution is, at least in part, governed primarily by magmatic processes and disturbed later by a hydrothermal solution.

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