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Fig. 8 | Earth, Planets and Space

Fig. 8

From: Preparation zones for large crustal earthquakes consequent on fault-valve action

Fig. 8

(photographs courtesy of Andrew Tunks)

Au-bearing quartz vein swarm at Damang Gold Mine, Ghana (from Tunks et al. 2004): a array of subhorizontal extension veins cutting steeply dipping Paleoproterozoic meta-sandstones; b subhorizontal extension veins locally evolving into a thrust-sense tension-gash shear zone under horizontal compression; c thrust-sense sigmoidal tension-gash shear zone; d mineralized thrust fault cutting through tension-gash shear zone

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