P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.
Abou El-Anwar, E., Mekky, H., Abdel Wahab, W. (2019). P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.. EKB Journal Management System, 62(12), 2213-2228. doi: 10.21608/ejchem.2019.11366.1728
Esmat Ahmed Abou El-Anwar; Hamed Mekky; Wael IBRAHEM Abdel Wahab. "P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.". EKB Journal Management System, 62, 12, 2019, 2213-2228. doi: 10.21608/ejchem.2019.11366.1728
Abou El-Anwar, E., Mekky, H., Abdel Wahab, W. (2019). 'P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.', EKB Journal Management System, 62(12), pp. 2213-2228. doi: 10.21608/ejchem.2019.11366.1728
Abou El-Anwar, E., Mekky, H., Abdel Wahab, W. P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.. EKB Journal Management System, 2019; 62(12): 2213-2228. doi: 10.21608/ejchem.2019.11366.1728

P2O5 – F- U Characterization and Depositional Environment of Phosphatic Rocks for the Duwi Formation, Qussier- Safaga Region, Red Sea Coast, Egypt.

Egyptian Journal of Chemistry
Article 4, Volume 62, Issue 12, December 2019, Page 2213-2228  XML PDF (2.3 MB)
Document Type: Original Article
DOI: 10.21608/ejchem.2019.11366.1728
View on SCiNiTO View on SCiNiTO
Authors
Esmat Ahmed Abou El-Anwarorcid 1; Hamed Mekky email orcid 2; Wael IBRAHEM Abdel Wahab3
1Prof. of Geochemistry Geological Sciences Dept., National Research Centre, Dokki, Giza, Egypt.
2National Research Centre- Geology Sciences Department
3Geological Sciences Dept., National Research Centre, Dokki
Abstract
Abstract
The Duwi Formation in Qusseir-Safaga region is conformably overlain by the Qusseir variegated shales and underlain by the Dakhla shales. The studied phosphatic rocks in the Duwi Formation, is an attractive rock unit for it’s enrichment in heavy metals and U content.
Mineralogically, phosphatic rocks in the Duwi Formation are mainly composed mainly of fluorapatite, in addition to minor occurrence of calcite, dolomite, gypsum, quartz, and pyrite. Geochemical data reveal that the rocks of the Duwi Formation were deposited under anoxic environments. The present study used the statistical result of the interrelation between P2O5, F and U concentrations on Egyptian phosphate samples and compared to the measured data. Uranium mostly occurs in an oxidized U 6+ state. It could be fixed with the phosphatic ion, forming secondary uranium phosphate minerals such as phosphuranylite and belovite in Qusseir region. In addition to Uranyl phosphates, uranium minerals in Safaga region contain also Uranyl carbonates and Uranyl sulfates, which had been attributed to the post-depositional U enrichment. The chemical data and index show that the phosphatic rocks in Safaga region are more enriched in the majority trace and rare earth elements, and are subjected to high chemical weathering than those in Qusseir region.
Keywords
Key Words: Qusseir-Safaga; Duwi Phosphates; Fluorapatite; trace elements; Phosphuranylite
Statistics
Article View: 637
PDF Download: 1,052