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354755

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

Article

Last updated: 28 Dec 2024

Subjects

-

Tags

Applied and Basic Science.

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.

DOI

10.21608/bjas.2024.281703.1399

Keywords

Qena- Safaga Shear Zone, SRTM/PALSAR data, Shear zone-related structures, Dokhan Volcanics

Authors

First Name

Asmaa

Last Name

.E.El-Araby

MiddleName

-

Affiliation

Geology Department, Faculty of Science, Benha University, Benha 13518, Egypt

Email

asmaageol@gmail.com

City

-

Orcid

-

First Name

Wael.

Last Name

D. Hagag

MiddleName

-

Affiliation

Geology Department, Faculty of Science, Benha University, Benha 13518, Egypt

Email

waelhagag78@yahoo.com

City

-

Orcid

-

First Name

Samir.

Last Name

Z.Kamh

MiddleName

-

Affiliation

Geology Department, Faculty of Science, Tanta University, Tanta 31527, Egypt

Email

skamh2002@yahoo.com

City

-

Orcid

-

First Name

Zakaria

Last Name

Hamimi

MiddleName

-

Affiliation

Geology, Faculty of Science, Benha university, Egypt

Email

zakariahamimi4@gmail.com

City

-

Orcid

-

First Name

Zakaria.

Last Name

E.Hamimi

MiddleName

-

Affiliation

Geology Department, Faculty of Science, Benha University, Benha 13518, Egypt

Email

-

City

-

Orcid

-

Volume

9

Article Issue

3

Related Issue

46895

Issue Date

2024-03-01

Receive Date

2024-03-11

Publish Date

2024-03-01

Page Start

207

Page End

217

Print ISSN

2356-9751

Online ISSN

2356-976X

Link

https://bjas.journals.ekb.eg/article_354755.html

Detail API

https://bjas.journals.ekb.eg/service?article_code=354755

Order

26

Type

Original Research Papers

Type Code

1,647

Publication Type

Journal

Publication Title

Benha Journal of Applied Sciences

Publication Link

https://bjas.journals.ekb.eg/

MainTitle

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

Details

Type

Article

Created At

28 Dec 2024