Ground-Truth' in aeromagnetism

Abstract

One of the unknowns in the interpretation of magnetic anomalies is often the magnetic properties of the source rocks. These properties can, however, be measured independently and at a cost that is small compared with the cost of carrying out an airborne survey. A systematic programme of rock-property measurements, linked to geological mapping in new aeromagnetic survey sheet areas, could develop into a valuable resource for all those using geophysical map data of Australia. Some examples from Africa are used to illustrate these points.