Analytical techniques in interpretation of regional aeromagnetic data

Abstract

Regional aeromagnetic interpretation includes an important mapping component as well as location of possible economic targets. Given these varied requirements, objective interpretation techniques based on spectral analysis and application of specialised filters play a major role. Recent improvements in computer hardware, particularly microcomputers, have made it possible to analyse more data and it is now feasible to perform quantitative analysis on complete blocks of aeromagnetic data. Quantitative analysis may be applied to profile or grid data or both, depending on the interpretation objectives and the data quality. Results are presented for two analytical interpretation techniques, location of the maxima of the pseudo-gravity gradient and 3D Euler deconvolution. These results together with apparent susceptibility mapping provide objective information on geological boundaries, depths and lithologies.