Interpretation of magnetic anomalies from dipping dike model using inverse solution, power spectrum and Hilbert transform methods

A theoretical and a field study were performed for the interpretation of the vertical component magnetic anomalies from dipping dike model with infinite depth extent. Damped least squares inverse solution, Hilbert transform and power spectrum methods were used in interpretation. The parameters affecting the power spectrum of the analytical model response were determined and discussed. Damped least squares inverse solution, Hilbert transform and power spectrum methods were examined on a theoretical anomaly of a magnetic dike model. The methods were then applied to a magnetic field anomaly from northeastern Turkey to obtain the dike parameters. Only the depth of the dike can be obtained in the power spectrum method, but it is also possible to find out the width of the structure if the slope of the dike is known. In the inversion method, it is possible to obtain all the dike parameters. The depth, width and the location of the origin of the dike can be obtained by Hilbert transform method. It was observed that the results obtained from all of the three methods are evidently consistent with each other.