METHOD EMPLOYING D.C. PULSES FOR THE DETECTION OF DISSEMINATED OR MASSIVE MINERALIZATION WITHIN THE EARTH CRUST BY PRODUCING AND A.C. ELECTRO MAGNETIC FIELD

摘要

Pulses of direct current are applied to the ground by means of a pair of electrodes or by means of a coil. These pulses produce an alternating current magnetic field if they are in the vicinity of a zone of mineralization. These secondary currents are measured both during and after the duration of the pulses thus enabling the zone to be deliniated readily and easily. The quality, quantity and geometry of the mineralized zone may be ascertained by analysing the characteristics of the secondary, alternating current magnetic field.