Bushveld Complex and related intrusions Investigation of the behaviour of platinum group elements in natural systems and the application to technical processes Basin analysis: Transvaal and Waterberg basins Environmental and engineering geology Groundwater exploration and management Precambrian crustal evolution Karoo coal deposition: Controls on swamp formation Exploration for Southern African magmatic Cu-Ni-PGE sulphide ores Dynamics of magmatic intrusions Structural and exploration geophysics Applied Mineralogy Economic Geology