Inherent limitations in the determination of basalt flow thickness using magnetic spectral techniques

Abstract

The method for the location of deposits of heavy minerals such as gold and tin, which occur in deep leads overlaid with volcanic lava flow, is a problem whose solution is of significant economic importance. For this reason it has been the subject of geophysical research for many years. Of the numerous methods investigated, spectral analysis of magnetic data in particular has been developed over the past quarter of a century, and success has been reported in the determination of the average depth to magnetic interfaces using aeromagnetic data and the spectral slope method.