10. Regional/Global Structural Applications
Interpretation of Aeromagnetic Data over Northern Western Desert of Egypt using Analytic Signal and Euler Methods
Ahmed Salem and Alaa Aref
Airborne Geophysics Department, Nuclear Materials Authority of Egypt, Egypt.
Abstract
A variety of semi-automatic methods, based on the use of derivatives of the magnetic anomalies, have been developed for the determination of causative source parameters, such as locations of boundaries and depths. These techniques include the analytic signal and Euler deconvolution methods. One of the advantages of these methods is that they don’t require prior knowledge of the magnetization direction and therefore it is useful in area of low magnetic latitudes and in existence of remanent magnetization. The Euler and analytic signal methods have been applied to the aeromagnetic data of the northern part of the Western Desert of Egypt in order to determine the fault systems which are probably present in the area. Application of analytic signal method indicated that the major tectonic trends that affect the studied area trending mainly in the E-W, ENE, WNW, NE, NNE and N-S directions. Euler deconvolution provided fast information about both the depth and trends of the shallower and deeper subsurface structures in the area. Results of the analytic signal and Euler methods supported with the available geological information were used to construct a basement tectonic map of the study area. Generally, the depth to the basement is shallower (around 3 km) in the southern part and gets deeper northward farther to the Mediterranean Sea (more than 5 km).
Last modified: Thu Apr 13 13:53:35 2006