INTERPRETATION OF MAGNETIC ANOMALIES USING SPECTRAL ESTIMATION TECHNIQUES*

Abstract

A bstract The depth of causative bodies may be derived from the power spectrum of their magnetic anomalies. After a short review of the theoretical basis of the method, several examples of its application to synthetic cases are shown. Disturbing effects due to improper choice of the sampling interval and to anomalies only partially contained in the examined segment of the profile are studied. The spectral method is then applied to real cases; the tapering of the anomalies, the application of non‐linear filters and the effects of anomaly superpositions are investigated. In conclusion, an appraisal of the method and of its possible practical impact has been given.