Mohamed EL-BOHOTY, Ladislav BRIMICH, Ahmed SALEH, Salah SALEH

Comparative study between the structural and tectonic situation of the Southern Sinai and the Red Sea, Egypt, as deduced from magnetic, gravity and seismic data

Introduction

Comparative study between the structural and tectonic situation of the southern sinai and the red sea, egypt, as deduced from magnetic, gravity and seismic data. Compare Southern Sinai & Red Sea structural tectonics using magnetic, gravity & seismic data. Analyze subsurface structures, tectonic trends, and crustal thickness with 3D models.

Abstract

The present study is concerned with the analysis of magnetic gravity andseismic data for the regions of the South Sinai and the Red Sea areas aiming to evaluatethe subsurface geologic active structures. The magnetic method of prospecting gives aneffective presentation of the subsurface structures. Moreover, the wavenumber filtering iscarried out utilizing three types of filters with varying wavelengths. The application ofthese tools on the magnetic and gravity data discriminated the variable sources of specificdepth ranges for the residual and regional anomalies, as well as those limited to a certaindepth interval. Also it was found that the main tectonic trends have taken the NE–SWand NW–SE directions. A three-dimensional (3D) interpretation of the Bouguer anomalyand aeromagnetic maps of the Gulf of Suez rift and the northern part of the Red Sea riftare presented. A high-resolution 3D model constrained with the seismic results reveals apossible crustal thickness and density distribution of the north Red Sea rift between thesedimentary cover and the mantle.

Review

This study presents a compelling multi-geophysical investigation into the structural and tectonic settings of the Southern Sinai and Red Sea regions of Egypt. By integrating magnetic, gravity, and seismic data, the authors aim to delineate subsurface geological structures and active tectonic elements. The abstract suggests a comprehensive approach to understanding the complex interplay of forces shaping this critical geodynamic region, promising valuable insights into the crustal architecture and evolution of an area characterized by significant extensional tectonics. The methodology appears robust, employing advanced data processing techniques such as wavenumber filtering with varying wavelengths to discriminate anomaly sources across different depth ranges from magnetic and gravity data. Furthermore, the study includes a three-dimensional (3D) interpretation of Bouguer anomaly and aeromagnetic maps, specifically focusing on the Gulf of Suez and northern Red Sea rifts. A high-resolution 3D model, constrained by seismic results, is highlighted for its potential to reveal crustal thickness and density distributions, from the sedimentary cover down to the mantle. The identification of main tectonic trends (NE–SW and NW–SE) further contributes to the understanding of regional stress fields. Overall, the paper outlines a significant contribution to regional geology and geophysics, leveraging a diverse set of geophysical datasets and sophisticated analytical tools. The integration of magnetic, gravity, and seismic data, coupled with 3D modeling, promises a detailed understanding of the subsurface. For the full manuscript, it would be beneficial to explicitly elaborate on the "comparative" aspects between the Southern Sinai and Red Sea regions, as indicated by the title, ensuring that the distinctions and similarities in their structural and tectonic situations are clearly articulated and discussed based on the presented results.

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