A structural sequence in low strain sedimentary rocks in the Beaufort Group of the south-western Karoo and its bearing on syngenetic and epigenetic mineralization

Halbich I.W. (1994)


Several sets of planar and linear structures are described from the very gently folded Karoo strata of the northern-most tectonic zone of the Permo-Triassic Cape Fold Belt. The superposition of these structures reveals a time sequence. Horizontal compression occurred before compaction was complete. After compaction further horizontal compression developed a sequence of structures that are readily interpreted in terms of visco-elastic strain in multilayers. This analysis reveals that a set of mainly antithetic kinks in the form of monoclines developed out of earlier incipient sinusoidal macrofolds during the final stages of horizontal N-S compression. The model is in agreement with evidence for synsedimentary folding that controlled the sites for erosion channels as well as the direction of sedimentary transport. Exploration efforts for syngenetic and/or fluid controlled epigenetic mineralization in permeable strata of this fluviatile sedimentary sequence should be directed along certain structural lines. © 1994.

Please refer to this item in SUNScholar by using the following persistent URL: http://hdl.handle.net/10019.1/11136
This item appears in the following collections: