GEOCHEMICAL CHARACTERISTICS AND RADIOACTIVE POTENTIALITY OF SOME METAMORPHIC ROCKS IN WADI SIKAIT, SOUTHEASTERN DESERT, EGYPT | ||||
| Nuclear Sciences Scientific Journal | ||||
| Volume 9, Issue 1, April 2020, Page 1-26 PDF (20.07 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/nssj.2020.265496 | ||||
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| Authors | ||||
| MOUSTAFA E. GHARIEB1; MOHAMED E. IBRAHIM2; GAMAL EL-DEEN M. ATTIA1; SAMEH H. NEGM2; HOSSAM E. ABU-ELMAATI2; TAREK F. MOHAMMADEN2 | ||||
| 1Dept. Geol.,, Fac. Sciences, Helwan Univ., Egypt | ||||
| 2Nuclear Materials Authority, Cairo, Egypt | ||||
| Abstract | ||||
| Sikait area locates between Lat. 24° 37' 16'' to 24° 38' N and Long. 34° 46' to 34° 46' 35'' E. It comprises several igneous and metamorphic rocks which mainly dissected by lamprophyre dykes and quartz veins. From the radioactivity point of view, the metamorphosed sandstone and the mylonite rocks were selected for this work. The petrographical features indicated that the metamorphosed sandstone is of greywacke type and probably sourced from igneous and metamorphic rocks while the mylonite was belonging to the granitic rocks. On the other hand the metamorphosed sandstone was found as pssamitic greywacke affected by albitiztion process and both the island arc and the felsic igneous are its tectonic environment and provenance respectively. The mylonite exhibited calc-alkaline and peralumenous nature of A-type granite that emplaced in the within-plate environment and affected by Na-metasomatism. The radiometric characteristics revealed a disequilibrium phase in both the rocks due to uranium addition process that play an important role in deposition of recent uranium and formation of the secondary uranium minerals particularly in the mylonite, while uranium in the metamorphosed sandstone is probably absorbed as free element on the clay matrix. Both the rocks are regarded as promising sources for the uranium exploitation. | ||||
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