CONTRIBUTION TO THE RADIOACTIVITY, MINERALOGY AND REES DISTRIBUTION IN THE GRANITOIDS OF GEBEL EL NEKEIBA, SOUTH EASTERN DESERT, EGYPT | ||
| Nuclear Sciences Scientific Journal | ||
| Article 4, Volume 3, Issue 1, 2014, Pages 55-66 PDF (4.97 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/nssj.2014.30939 | ||
| Author | ||
| EHAB K. ABU ZEID | ||
| Nuclear Materials Authority,Cairo, Egypt | ||
| Abstract | ||
| Gebel El Nekeiba is composed mainly of quartz-syenite surrounding syenogranite. Syenogranite is characterized by the presence of allanite, zircon and fluorite. Qz-syenite is more radioactive and characterized by the presence of violet and deep violet fluorite, zircon and columbite besides thorium minerals (thorite and orangite). The latter were transformed to thorogummite by hydrolysis. The studied rocks are characterized by low Th/U ratio. Quartz syenite and syenogranite rocks show high concentrations of REEs; the former is characterized by higher concentration of HREEs than LREEs. Distribution of REEs in Gebel El Nekeiba is controlled by the elements concentration in the parent magma, and degree of fractionation in the hosting rocks and minerals. | ||
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