Geochemical Characterization of the Upper Cretaceous Duwi Phosphorites in the Beida Mine, Central Eastern Desert, Egypt: Implications of P2O5 – F – U Interrelations.
Osham, A., Mahmoud, A., Abdel aal, M., Gad, A., Abdel Wahab, W. (2022). Geochemical Characterization of the Upper Cretaceous Duwi Phosphorites in the Beida Mine, Central Eastern Desert, Egypt: Implications of P2O5 – F – U Interrelations.. EKB Journal Management System, 65(132), 617-627. doi: 10.21608/ejchem.2022.136420.6011
Aya Osham; Abdel moneim Mahmoud; Mohamed Abdel aal; Ahmed Gad; Wael Abdel Wahab. "Geochemical Characterization of the Upper Cretaceous Duwi Phosphorites in the Beida Mine, Central Eastern Desert, Egypt: Implications of P2O5 – F – U Interrelations.". EKB Journal Management System, 65, 132, 2022, 617-627. doi: 10.21608/ejchem.2022.136420.6011
Osham, A., Mahmoud, A., Abdel aal, M., Gad, A., Abdel Wahab, W. (2022). 'Geochemical Characterization of the Upper Cretaceous Duwi Phosphorites in the Beida Mine, Central Eastern Desert, Egypt: Implications of P2O5 – F – U Interrelations.', EKB Journal Management System, 65(132), pp. 617-627. doi: 10.21608/ejchem.2022.136420.6011
Osham, A., Mahmoud, A., Abdel aal, M., Gad, A., Abdel Wahab, W. Geochemical Characterization of the Upper Cretaceous Duwi Phosphorites in the Beida Mine, Central Eastern Desert, Egypt: Implications of P2O5 – F – U Interrelations.. EKB Journal Management System, 2022; 65(132): 617-627. doi: 10.21608/ejchem.2022.136420.6011

Geochemical Characterization of the Upper Cretaceous Duwi Phosphorites in the Beida Mine, Central Eastern Desert, Egypt: Implications of P2O5 – F – U Interrelations.

Egyptian Journal of Chemistry
Volume 65, Issue 132, December 2022, Page 617-627  XML PDF (1.59 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2022.136420.6011
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Authors
Aya Osham email 1; Abdel moneim Mahmoud2; Mohamed Abdel aal2; Ahmed Gadorcid 3; Wael Abdel Wahab4
1Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, Cairo, Egypt
2Biological and Geological Sciences Department, Faculty of Education, Ain Shams University, Egypt
3Geology Department, Faculty of Science, Ain Shams University, Cairo, Egypt
4Geological Sciences Dept., National Research Centre, Dokki
Abstract
Integrated petrographical, mineralogical, and geochemical studies were carried out on the phosphate beds of the Duwi Formation, which was exposed at the Beida mine. Petrographically, the investigated phosphatic microfacies are Molluscal bioclastic phosphatic grainstone and Biopeloidal phosphatic grainstone, generally composed of phosphatic pellets of collophane and bioclasts bone and teeth fragments indicating a high-energy near-shore depositional environment and formed authigenically within oxic to suboxic zones from phosphate-rich sediments. The main mineralogical constituents of the considered sample are phosphatic minerals including Dahlite, Francolite, and Hydroxylapatite, while the non-phosphatic minerals are Quartz, Calcite, Halite, and Ankerite. Geochemical studies reflect that the phosphorites in the Beida mine obtain medium-grade ore with an average of 25.01 % P2O5. The significant correlation between P2O5 and U reflects that the U may be present in the apatite crystal lattice. The more considerable values in calculated uraniumthan measured uranium could be attributed to the post-depositional enrichment of uranium.
Keywords
Keywords: Duwi; Phosphate; Fluorine; Uranium; Geochemistry
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