Investigating Geodynamic Processes and Regional Stress in Wadi Hagul, Egypt, Through Gravity and Seismicity Analysis

Etman, Mahmoud Sayed; Mohamed, Abdel-monem S.; Saleh, Salah; Mohamed, Sayed; Fergawy, Karrar

doi:10.21608/astb.2024.334121.1010

Investigating Geodynamic Processes and Regional Stress in Wadi Hagul, Egypt, Through Gravity and Seismicity Analysis

Document Type : Original Article

Authors

¹ NRIAG,Cairo,Egypt

² National Research Institute of Astronomy and Geophysics, Helwan, Cairo, Egypt

³ National Authority for Remote Sensing and Space Science (NARSS), Cairo, Egypt

⁴ Geology Department, Faculty of Science, Aswan University, Aswan, Egypt

10.21608/astb.2024.334121.1010

Abstract

The tension and structural dynamics beneath Eastern Desert, Egypt namely Wadi Hagul, remain little comprehended despite intricate tectonic activity. This study aims to geodynamic processes in Wadi Hagul, Egypt, using gravity and seismic data to assess area stress levels. Seismicity data offers a thorough evaluation of stress levels in the research area, demonstrating a significant link between high-shear stress zones and the distribution of seismic activity. The northwestern region of the Gulf of Suez displays crustal tension in almost orthogonal orientations, while normal faulting predominates in the stress field. Our findings underscore notable regional disparities in stress regimes, signifying active faulting and deformation patterns. Gravity prospecting techniques provide significant insights, utilizing Bouguer anomaly maps derived from adjusted gravity data. Filtering algorithms identified local anomalies, and radial power spectrum integration determined the depths of shallow and deep sources, varying from 1 km to 3 km for gravity anomalies. Two-dimensional models based on Bouguer gravity data illustrated depths ranging from 0 m to -7000 m. Early basement maps showed that the Hagul region had different depths and tectonic activity. The study results highlight considerable tectonic activity and improve comprehension of geological dynamics, revealing structural patterns in many directions. The 2D models demonstrated a deepening of basement rocks to the north, while crustal thickness augmented to the south and diminished to the north. Our findings provide significant insights into the geodynamic processes and regional stress distribution in Wadi Hagul, with practical implications for seismic hazard assessment and resource exploration in tectonically active regions.

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