Macro- and mesoscale features of the Potgieterspoort thrust, Kango Group

Le Roux J.P. ; Smit P.H. (1995)

A large thrust fault in the Kango Group discovered during 1975, was traced to the westernmost part of the inlier during the present investigation. This indicates an east - west extension of the thrust sheet for a distance of at least 64 km. Although the contact with the underlying strata is almost without exception knife sharp, several small-scale associated features indicate northward movement along the thrust. It appears that initial faulting occurred after the formation of the first pre-Cape (S1) cleavage while the sediments were still water-laden. These fluids may have provided the hydrostatic pressure required to sustain large-scale thrusting without the formation of significant breccia, gouge, or mylonite. Later movement along the fault appears to have occurred during the second pre-Cape (F2 -S2) phase of deformation, whereas folding of the thrust plane may have taken place during the Cape orogeny (F3-S3). -Authors

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