DETERMINING THE DEPTH OF BASEMENT SURFACE AND SUBSURFACE STRUCTURES AT QARUN LAKE THROUGH MAGNETIC DATA

Document Type : Original Article

Authors

1 Geology, science, Al-Azhar, Nasr city, Cairo

2 Head of Geology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt.

3 National Research Institute of Astronomy and Geophysics

4 NRIAG

Abstract

This study focuses on a specific region in the northeastern part of the Western Desert, located at northwestern Beni Suef, which includes the Wadi Al Rayan area, the Gindi Basin, the Kattaniya Inversion and the El Fayum Depression. The main objective of this survey is to evaluate the depth to the basement complex of the designated area. To achieve this goal, a comprehensive approach was adopted that includes collecting, interpreting and analyzing magnetic data. A detailed land magnetic survey integrated with existing aeromagnetic data. Both data of the aeromagnetic anomaly and land magnetic survey were processed and interpreted using various techniques to better understand the study area's tectonic setting. Several filters were applied during data analysis, including 2D power spectrum, Source Parameter Imaging (SPI), and Euler deconvolution techniques. The results of these analyses showed that the average calculated depth is between 200 and 700 meters for land magnetic data and between 900 and 10,500 meters for aeromagnetic data. Application of these filters revealed a series of large alternating highs and troughs trending in ENE-WSW, NE-SW and E-W directions. These major trends, along with other minor trends, have shaped the subsurface into numerous inclined fault blocks. Consequently, this brought about the creation of anticlinal and synclinal zones of varying depth and orientation.

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