Pattern recognition of structural boundaries from aeromagnetic data using the 2-D continuous wavelet transform and the 3-D analytic signal

The main goal of this paper is to use the 2-D continuous wavelet transform (CWT) combined with the 3-D analytic signal (AS) for structural boundaries delimitation from aeromagnetic data. The basic idea is based on the mapping of the maxima of the modulus of the 2-D CWT of the amplitude of the 3-D analytic signal (AS) for the full range of scales used to calculate the 2-D CWT. The proposed idea is applied to the synthetic data of a prism and a cylinder; obtained results show the power of this technique for contacts mapping in cases of high vector magnetization direction. Obtained results of the application to real aeromagnetic data of In Ouzzal area located in the west of Hoggar (Algeria) are compared with the 3-D analytic signal solutions. They show robustness of the proposed tool for pattern recognition of structural boundaries from potential geomagnetic data.