An approximate model of the magnetometric resistivity (MMR) and magnetic induced polarization (MIP) responses of dipping dikes beneath a conductive overburden

Abstract

Much of Australia is covered by a weathered, conductive surface layer. Conductive, dike-like, mineral deposits, embedded in a resistive basement material, exist beneath it and often contact it. A suitable mathematical model of this geology is a set of intersecting half planes. The MMR and MIP anomalies of the model are calculated analytically. A limited set of type curves for the simple model of a single dipping dike beneath a conductive overburden is presented. The curves reveal that the shape of the MMR anomaly is a strong function of dip. A computer program is provided to generate additional curves and to stimulate further research.