The following information was submitted:
Transactions: INTERNATIONAL JOURNAL of GEOLOGY
Transactions ID Number: 19-183
Full Name: Waheed Hashem
Position: Lecturer
Age: ON
Sex: Male
Address: Geology Department, College of science, UAE University
Country: UNITED ARAB EMIRATES
Tel: +971505836910
Tel prefix:
Fax: +97137671291
E-mail address: w.hashem@uaeu.ac.ae
Other E-mails: whashem71@hotmail.com
Title of the Paper: Late Cretaceous–Eocene Reactivations of the Hatta Shear Zone, Northern Oman Mountains
Authors as they appear in the Paper: Ali Abd-Allah, Waheed Hashem and Osman Abdelghany
Email addresses of all the authors: aliabdallah62@hotmail.com, osman.abdelghany@uaeu.ac.ae, w.hashem@uaeu.ac.ae
Number of paper pages: 10
Abstract: The NW-trending Hatta Shear Zone was formed in the Late Cretaceous during the emplacement of the Tethyan rocks and oceanic crust on the eastern margin of the Arabian plate. The western end of this shear zone is draped over by the Campanian-Lower Eocene carbonate rocks. These rocks were thrusted and folded later during the Tertiary Alpine deformation event. The folds are represented by two large plunging, asymmetrical NW-oriented anticlines that are interveined with a middle box-shape syncline, in addition to, four small NE and E-W trending folds. The syncline is characterized by a 3-segmented z-shape, as separated by the two bends; one of them is occupied by NE-oriented folds while the other is occupied by E-W oriented folds. The origin of this syncline may be controlled by the displacement over NW-trending, NE-dipping en echelon thrust faults bounding it. The estimated E-W regional compressive stress that initially accompanied the Cretaceous rock emplacement was l!
ocally adopted in later stages to NE-SW orientation. This deformation took place synchronous to deposition in three stages. It is commenced during the Campanian-Late Maastrichtian and renewed in Early Paleocene and in post Early Eocene times. This NE-SW compression produced El Rawdah structures, which reflect shortening values between 14% and 29.4%. The rock mechanical properties and bed thicknesses controlled the folding mechanisms. Whereas, buckling developed open folds in the thick and relatively brittle beds of the Campanian to Maastrichtian rocks, while flexural slip folding mechanism produced tight folds in the thin and ductile beds of the Maastrichtian to Early Eocene rocks.
Keywords: Cretaceous-Eocene deformations, Jabal El Rawdah, Hatta shear zone, Northern Oman Mountains.
EXTENSION of the file: .doc
Special (Invited) Session: Post-obduction deformations of the northwestern end of the
Organizer of the Session: 609-350
How Did you learn about congress: Abdel Rahman Fowler, afowler@uaeu.ac.ae
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