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د. علي بن يحيى قحل Dr. Ali Yahya Kahal

Associate Professor

عضو هيئة تدريس

كلية العلوم
كلية العلوم - مبنى ٤ - قسم الجيولوجيا والجيوفيزياء - الدور الثاني - ٢ب 117
publication
Journal Article
2021

Faulting Intersections and Magma-feeding Zones in Tihamat-Asir, Southeast Red Sea Rift: Aeromagnetic and Structural Perspective

The Tihamat-Asir area is located in southwest Saudi Arabia between the Asir Mountains and the Red Sea coast.
Herein, the Tihamat-Asir area aeromagnetic data are re-interpreted to explain the magmatic activity and related
structural interaction between extensional normal and transfer strike-slip faulting. The magnetic anomaly
structural interpretation indicates that faulting and related magmatic activities are the main structural features
affecting the study area. The magnetic signatures reveal oceanic crust underlying the onshore and offshore
western side of the study area, while the eastern side is characterized by a broad, low magnetic anomaly
indicative of continental crust. The boundary between the oceanic and continental crusts is not sharp, and
represents a transitional zone, characterized by magnetic gradient steepness potentially related to mid-Cenozoic
gabbroic plutons and volcanic flows together with normal faults injected by Cenozoic basalts. This zone incorporates
three NW striking normal faulting and NE striking transfer strike-slip faulting system intersections,
located close to Baysh, Abu Arish, and southwest of Abu Arish. The intersectional interactions between these two
faulting systems have resulted in brittle magma-feeding zones that have allowed magma to reach the surface at
these localities, and is believed to have resulted from the fracturing process affecting these localities due to the
accumulated stress exerted by the movement of the NE strike-slip faults along the normal NW faulting systems
and the associated releasing bends. A pull-apart magma-feeding zone is the structural model proposed to explain
the interpreted brittle magma feeding zones and the associated magmatic activities in the study area.

more of publication
publications

The purpose of this study is to present the source rock characteristics of Late Cretaceous Harshiyat Formation
source rock in the onshore and offshore basins of Yemen (i.e. Mukalla-Sayhut,…

by Mohammed Hail Hakimi, Adeeb Ahmed, Ali Y. Kahal, Osman Salad Hersi, Hussain J. Al Faifi, and Saleh Qaysi
2020
publications

The Tihamat-Asir area is located in southwest Saudi Arabia between the Asir Mountains and the Red Sea coast.
Herein, the Tihamat-Asir area aeromagnetic data are re-interpreted to explain the…

by Elkhedr Ibrahim, Essam Abd El-Motaal, Aref Lashin, Hussain Alfaifi, Saleh Qaysi and Ali Kahal
2021
publications

Landslides hazard as one of the major environmental threats of the Neom promising city in northwestern
Saudi Arabia has been assessed through data integration of several sources including…

by Ali Y. Kahal, kamal Abdelrahman, Hussain J. Alfaifi, Madyan M.A. Yahya
2021