Interpretation of the aeromagnetic map of Eastern Hoggar (Algeria) using the Euler deconvolution, analytic signal and local wavenumber methods

Abstract

The interpretation of regional aeromagnetic data is very useful for structural interpretations. In this study, we have used three techniques to locate geological contacts and major faults, namely: the Euler deconvolution, the analytic signal and the local wavenumber methods. These three techniques have been tested on synthetic models for accuracy and sensitivity, to determine the best parameters that yield a realistic interpretation. The results obtained from each method on synthetic data, with or without random noise, are compared and discussed here. The three methods were applied to the interpretation of aeromagnetic data from Eastern Hoggar (Algeria). This interpretation led to the establishment of a structural map of the Eastern Hoggar with the eastern boundary of the Issalane terrane suggested to be the suture zone between the central Hoggar and the Saharan metacraton.