Interpretation and design of time domain electromagnetic surveys in areas of conductive orverburden

Abstract

The TEM method is being used increasingly for mineral exploration and geological mapping in Australia. The techniques can be divided into one-loop and coincident-loop systems (MPPO?1, MPP?3, SIROTEM) and two-loop systems (Pulse EM, Newmont EMP, SIROTEM, UTEM); the two systems exhibit markedly different responses over the conductive surface layers which cover much of Australia. Exploration in the eighties by this method will depend on developing methods of quantitative interpretation of anomalies caused by variations in the surface layer.