Compressive deformation of a pre-Bushveld diabasic sill, Sudwala, eastern Transvaal
A tremolite-bearing metadolerite sill, intrusive into the Upper Monte Christo Formation is exposed in a road cutting in the eastern Transvaal, close to the Elandshoogte Gold Mine. A subhorizontal thrust fault is located along the footwall contact and steeper, westerly dipping splays are present. The structure developed is consistent with ESE-directed thrust faulting of an initially en echelon set of sills. Bleaching of the wall-rocks occurs around the fault splays and subeconomic gold mineralisation is present in fault-related, carbonate-quartz veining