Structural mapping and kinematic history of the Qena-Safaga Shear Zone (Egyptian Nubian Shield, East African Orogen)
.E.El-Araby, A., D. Hagag, W., Z.Kamh, S., Hamimi, Z., E.Hamimi, Z. (2024). Structural mapping and kinematic history of the Qena-Safaga Shear Zone (Egyptian Nubian Shield, East African Orogen). EKB Journal Management System, 9(3), 207-217. doi: 10.21608/bjas.2024.281703.1399
Asmaa .E.El-Araby; Wael. D. Hagag; Samir. Z.Kamh; Zakaria Hamimi; Zakaria. E.Hamimi. "Structural mapping and kinematic history of the Qena-Safaga Shear Zone (Egyptian Nubian Shield, East African Orogen)". EKB Journal Management System, 9, 3, 2024, 207-217. doi: 10.21608/bjas.2024.281703.1399
.E.El-Araby, A., D. Hagag, W., Z.Kamh, S., Hamimi, Z., E.Hamimi, Z. (2024). 'Structural mapping and kinematic history of the Qena-Safaga Shear Zone (Egyptian Nubian Shield, East African Orogen)', EKB Journal Management System, 9(3), pp. 207-217. doi: 10.21608/bjas.2024.281703.1399
.E.El-Araby, A., D. Hagag, W., Z.Kamh, S., Hamimi, Z., E.Hamimi, Z. Structural mapping and kinematic history of the Qena-Safaga Shear Zone (Egyptian Nubian Shield, East African Orogen). EKB Journal Management System, 2024; 9(3): 207-217. doi: 10.21608/bjas.2024.281703.1399

Structural mapping and kinematic history of the Qena-Safaga Shear Zone (Egyptian Nubian Shield, East African Orogen)

Benha Journal of Applied Sciences
Article 79, Volume 9, Issue 3, March 2024, Page 207-217  XML PDF (1.5 MB)
Document Type: Original Research Papers
DOI: 10.21608/bjas.2024.281703.1399
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Authors
Asmaa .E.El-Araby email 1; Wael. D. Hagag1; Samir. Z.Kamh2; Zakaria Hamimi3; Zakaria. E.Hamimi1
1Geology Department, Faculty of Science, Benha University, Benha 13518, Egypt
2Geology Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
3Geology, Faculty of Science, Benha university, Egypt
Abstract
The Qena- Safaga Shear Zone (QSSZ) is a megashear belt separating the Northern- and the Central- Tectonic Provinces of the Egyptian Nubian Shield (ENS).  Processing of remotely sensed data of the Landsat-8, ASTER and Sentinel 2A, accompanied by field/structural investigation made it possible to construct a plausible structural map for this high strain zone. A wide variety of Neoproterozoic litho-units outcrop in the area, including ophiolitic mélange, syn- tectonic granitoids, late- tectonic granitoids, Dokhan Volcanics and post- tectonic granitoids. Dike swarms traverse some of these units. The automatic lineament extraction using SRTM and PALSAR images verified that the dominant structural trend is the NE-SW. Other trends, comprising E-W (to ENE-WSW), NW-SE (to NNW-SSE) and N-S (to NNE-SSW) are also recognized. The main structural elements documented in the area embrace foliations and lineations, faults and shear zones, as well as shear zone-related structures (e.g. folds, duplexes and flower structures). The sense of movement along the aforementioned shear trends can be detected by a wide variety of kinematic indicators include mylonite, boudinage structure and deformed pebbles. The geological structures documented along the QSSZ indicate a brittle-ductile tectonic regime accompanied with voluminous granitic intrusions of various composition. Such structural and tectonic setting advocates a complex tectonic history characterized by extensional and transtensional tectonic regimes. The obtained results are significantly contributed to our knowledge on the high strain shear belts in the ENS.
Keywords
Qena- Safaga Shear Zone; SRTM/PALSAR data; Shear zone-related structures; Dokhan Volcanics
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