Natural radioactivity and geochemical aspects of radioactive mineralisation in El Sela, South Eastern Desert, Egypt

The natural radioactivity data revealed that eU reached up to 157.4, 1625 and 178 ppm in microgranite and dolerite dikes as well as japer vein, respectively, whereas the two-mica granite possesses the higher eTh-contents up to 53.8 ppm. Mineralogically, the two-mica granite is enriched in thorite, b...

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Bibliographic Details
Published in:International journal of environmental analytical chemistry 2023-08, Vol.103 (10), p.2338-2350
Main Authors: Ghoneim, Mohamed M., Panova, Elena G., Abdel Gawad, Ahmed E.
Format: Article
Language:English
Subjects:
El Sela
Embankments
Granite
Mica
Mineral deposits
Mineralization
mineralogy
Natural radioactivity
Radioactivity
Rock intrusions
Shear zone
Thorite
thorium
Uranium
Uranium ores
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Summary:The natural radioactivity data revealed that eU reached up to 157.4, 1625 and 178 ppm in microgranite and dolerite dikes as well as japer vein, respectively, whereas the two-mica granite possesses the higher eTh-contents up to 53.8 ppm. Mineralogically, the two-mica granite is enriched in thorite, brockite and uranothorite, whereas uraninite and coffinite are recorded in dolerite, and the latter one is recorded in microgranite, bostonite and jasper. Primary uranium minerals as uraninite and coffinite could be a source for uranium enrichment and the formation of secondary uranium mineralisation. Uranium mobilisation was active towards the two perpendicular shear zones having NNW-SSE and ENE-WSW rejuvenated trends. Successive hydrothermal alterations play their role in the formation of uranium ore deposits to be trapped in post-granitic dikes.
ISSN:0306-7319
1029-0397
DOI:10.1080/03067319.2021.1892665