Abstract
The study area is located at the south of the eastern desert of Egypt between latitudes 24°N to 25°N and longitudes 33°E to 33°50'E covering an area of about 9407 km2. The study area is mainly covered with sediments whose age extends from the upper Cretaceous to the Quaternary, in addition to the presence of some basement rocks such as younger granites, metasediments and metagabbro. The research aims essentially to determine the thickness of the sedimentary basin by determining the depth to the top of basement and delineating the subsurface geological structures which affected this sedimentary basin. The Euler depth map exhibited that the north parts of the area have shallow depth values from 1000 m to 2000 m. The southern parts also show a shallow to moderate depths ranging from 1000 m to 2400 m. The deepest parts are located at the middle and at the western parts and are ranging in value from 3000 m to more than 4000 m. The horizontal derivative and tilt derivative techniques proved that the most effective trends all over the study area are NW-SE and NE-SW directions as mentioned in geologic lineaments map. The basement tectonic map shows clearly all the faults affected the area. It shows that there are many high blocks trending mainly in NW-SE and NE-SW directions. All high blocks surround a large sedimentary basin reaches depth of about more than 4000 m. All the results produced from 2D-modeling illustrate that the sedimentary basinal area (G2) is the deeper basin all over the area and it is controlled by some faults and fractures. 3D inversion was used and resulted in that the area of study have many high blocks at shallow to moderate depths which surrounding a large sedimentary basinal area with very deep depth values. All the techniques which applied in this research led to that the largest sedimentary basin is located at the center of the study area with NW-SE trend and depth value of about 4000 m.
Highlights
The present study area (Figure 1) is located at the southern part of the Eastern Desert of Egypt
The study area is located at the south of the eastern desert of Egypt between latitudes 24 ̊N to 25 ̊N and longitudes 33 ̊E to 33 ̊50'E covering an area of about 9407 km2
All the results produced from 2Dmodeling illustrate that the sedimentary basinal area (G2) is the deeper basin all over the area and it is controlled by some faults and fractures. 3D inversion was used and resulted in that the area of study have many high blocks at shallow to moderate depths which surrounding a large sedimentary basinal area with very deep depth values
Summary
The present study area (Figure 1) is located at the southern part of the Eastern Desert of Egypt (covering an area of 9407 km). The present study area (Figure 1) is located at the southern part of the Eastern Desert of Egypt (covering an area of 9407 km2) This area is mainly covered by sedimentary rocks ranging in age from Upper Cretaceous to Quaternary. 2D and 3D-aeromagnetic models were used to determine the depth of basement and the thickness of the sedimentary basin. Another objective is to detect the subsurface structural features that control this sedimentary basin. All techniques were used in an integrative manner to achieve the objectives of the study
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