TITLE:
Characterization of a Post Orogenic A-Type Granite, Gabal El Atawi, Central Eastern Desert, Egypt: Geochemical and Radioactive Perspectives
AUTHORS:
Khairiya M. Fawzy
KEYWORDS:
Radioactivity, Geochemistry, Post-Orogenic, A-Type Granite, Gabal El Atawi, Central Eastern Desert, Egypt
JOURNAL NAME:
Open Journal of Geology,
Vol.7 No.1,
January
25,
2017
ABSTRACT: The alkali feldspar
granite of Gabal El Atawi is post orogenic granite originated from subalkaline
magma in extensional suite. It is developed within plate tectonic setting and
has A2-type character which generated from apparent crustal source.
The petrographic, geochemical and radioactive characteristics of El Atawi
granite meet and fulfill the requirements of being fertile granite and it can
be considered as promising uraniferous granite. Fluid inclusion studies of the
altered granite elucidated two different solutions acting on the host granitic
pluton. The first is NaCl-CaCl low temperature fluid with a wide range of
salinity. The second is high temperature and salinity Fe-Mg-Na chloride
solution. Different fractures in the granite acted as good channels for the
hydrothermal fluids that leached uranium from its bearing minerals disseminated
all over the host granite and redeposited it in the alteration zones.