High Resolution Aeromagnetic Mapping of “Loss-of-Ground” Features at Platinum and Coal Mines in South Africa

Geophysical mapping has traditionally provided mine-planners with cost-effective advance information<br>relating to the subcrop positions of “loss-of-ground” features such as dykes, sills, discrete mafic<br>intrusions and certain structural disturbances. These are currently mapped from aeromagnetic surveys<br>of an unprecedently detailed nature, providing “3D” coverage and a spatial mapping resolution which<br>approaches that of ground surveys with the added benefit of a significant decrease in surface noise.