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Dr. Wael Dardir Ahmed Mohamed Hagag :: Publications:

Title:
Structural evolution and Cenozoic tectonostratigraphy of the Cairo-Suez district, north Eastern Desert of Egypt: Field-structural data from Gebel Qattamiya-Gebel Um Reheiat area
Authors: W. D. A. Hagag
Year: 2016
Keywords: Structural evolution Gebel Qattamiya-Gebel Um Reheiat area Cairo-Suez district Tectonostratigraphy
Journal: J. of African Earth Science
Volume: 118
Issue: Not Available
Pages: 174-191
Publisher: Elsevier
Local/International: International
Paper Link:
Full paper Wael Dardir Ahmed Mohamed Hagag_Wael Hagag, structural evolution of Cairo-Suez, paper JAES 2016.tiff
Supplementary materials Not Available
Abstract:

Detailed field mapping reveals that continental rifting is strongly deforming the Gebel Qattamiya-Gebel Um Reheiat area and the entire Cairo-Suez district, in north Eastern Desert of Egypt. Rift-related structures are predominantly represented by E to WNW, NNW and NW oriented faults. The E to WNW oriented faults are small and build up the Gebel Qattamiya en echelon fault belt, whereas the faults trending NNWand NWestablish a pervasive horst and graben structural style involving some rhomb-shape horsts as Gebel Qattamiya (GQRH), Gebel Um Reheiat (GURRH) and south Gebel Um Reheiat (SGURRH). Rock units of the Eocene succession and Oligocene sediments are well exposed and highly controlled by riftrelated structures. Rifting was developed through two rift-phases; initial and major ones. The initial phase (a newly recognized phase in this contribution) has been occurred in Late Eocene (Priabonian), while the main phase was prevailing during Late Oligocene-Early Miocene time and is characterized by hydrothermal veins and basaltic eruptions. Continental transtension in the Cairo-Suez district, including the study area, was probably synchronous with a major tectonic stage (Pyrenean-Atlasic movement) of continental collision between AfricaneArabian and Eurasian plates in Late EoceneeOligocene time. Field investigation suggests that the transfer of displacement (slip) from the Gulf of Suez proto-rift into the EeW oriented faults ‘‘relays’’ is an important mechanism, which helps to explain the current structural framework and tectonic evolution of the Cairo-Suez district. Reactivation of such faults with right-lateral divergent wrenching with NEeSW oriented extension deformed the Cairo-Suez district with several EeWoriented en echelon fault belts (e.g. Gebel Qattamiya fault belt in the study area). Thus the Cairo-Suez district represents an accommodation or transfer zone in northeastern Egypt, intercepting the ‘‘far-field stresses’’ from the ArabianeNubian Shield, the Red Sea-Gulf of Suez rift and the Maghrebian Shield.

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