Facies Analysis and Geochemistry of Upper Cretaceous Carbonate Rocks, Wadi Feiran District, West Central Sinai, Egypt

The current study focuses on the geochemistry and facies analysis of the Upper Cretaceous carbonate rocks deposited in Wadi Feiran, West-Central Sinai, Egypt. The study area is defined by the careful petrographic and geochemical examination of four stratigraphic units, including Raha, Wata, Matulla, and Sudr formations. Ten microfacies types were recognized, listed from bottom to top; Fossiliferous-micrite, Bio-micrite, Pell-Bio-Micrite, Argillaceous Dolo-Biomicrite, Glauco- Dolo-Sparite, Glauco-Dolo-Microsparite, Dolo-Silty-Micrite, Bio- Pell-Sparite, Micrite and Foraminifera Biomicrite. The vertical distribution of these microfacies types indicates cyclic alternation between open and confined marine (bank interior deposits) deposition environments. The carbonate rocks were exposed to subaerial and submarine depositional settings diagenetically. The overflow dispersion of both main and minor components was determined by applying chemical and physicochemical parameter assessments to the selected samples. The review demonstrates that shallow sea conditions prevailed during the Upper Cretaceous.