Document Details

Document Type : Article In Journal 
Document Title :
Uranium Geochemistry in Peraluminous Leucogranites of Wadi El-Shallal Area, Sinai, Egypt
جيوكيميائية اليورانيوم في الليكوجرانيت البيرالمنس ( فوق الألوميني ) بمنطقة وادي الشلال - سيناء - مصر
 
Subject : Earth Sciences 
Document Language : English 
Abstract : The two mica granites of El-Shallal area being emplaced into biotite schists, which underwent high temperature low pressure metamorphism. The two mica granite is peraluminous leucoadamellite to leucogranite in composition, Fe-rich sub-alkaline, with low contents of Ba, Ce and Sm and high contents of Rb, U and K. These facts substantiate the geochemical characteristics of S-type granites. The field observations and petrochemical characteristics are consistent with the derivation of El-Shallal two mica granites from biotite schists. Many of geochemical and mineralogical characteristics of El-Shallal two mica granites are similar to those of fertile Granites Uranifere Français (G.U.F). The average uranium and thorium contents of the two mica granites are relatively high (17 and 32 ppm respectively) and increase during late magmatic stage (72 and 134 ppm respectively) close to basic dykes (chemical traps for U-bearing solutions) compared to the average granitic rocks and exceed the international average content in the crustal rocks. El-Shallal leucogranites may represent the source for uranium occurrences at Um Bogma formation as a result of leaching and remobilization by circulated meteoric water and precipitated simultaneous with and after sedimentation. 
ISSN : 1012-8832 
Journal Name : Earth Sciences Journal 
Volume : 12 
Issue Number : 1 
Publishing Year : 1421 AH
2000 AD 
Number Of Pages : 20 
Article Type : Article 
Added Date : Sunday, October 11, 2009 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
محمد الأحمدي إبراهيمM. E. IbrahimResearcher  
حسين عبدالمحسن حسين A. H. HusseinResearcher  
عبدالمنعم محمد عثمان A. M. OSMANResearcher  
إبراهيم حسن إبراهيمI. H. IBRAHIM Researcher  

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