Journal
APPLIED RADIATION AND ISOTOPES
Volume 168, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2020.109493
Keywords
El-missikat area; Shear zone; U mineralization; Radiological hazard; Egypt
Categories
Funding
- Southern Federal University
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The shear zone of the El-Missikat area is considered one of the most important occurrences of uranium mineralization in the Central Eastern Desert of Egypt, characterized by tabular elongated zone of crushing and brecciation with silicification. The concentrations of natural radionuclides suggest the presence of U mineralization in granitic rocks and silica veins, mainly represented by radioactive minerals such as uranophane, kasolite, and U-bearing zircon.
The shear zone of the El-Missikat area is considered one of the most important occurrences of uranium (U) mineralization in the Central Eastern Desert of Egypt. This shear zone is characterized by a tabular elongated zone of crushing and brecciation resulting from many parallel fractures or intense jointing, and presence of silicification and other alteration products together with the occasional presence of U mineralization. The concentrations of the natural radionuclides were measured by Sodium Iodide Detector NaI (Tl) in 87 granitic rocks and silica veins collected from the Central Eastern Desert. Measurement of radioactive elements suggests U present in granite of the El-Missikat pluton as well as in red, black and jasperoid silica veins. Radioactive mineralization was determined by scanning electron, binocular, and polarizing microscopies. The mineralizations are represented by syn-genetic U-leaching origin accompanying granitic rocks and post-magmatic association in red and black silica veins. The U-host mineralizations are mainly represented by radioactive minerals such as uranophane, kasolite, and U-bearing zircon.
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