Abstract
The structural framework in the northeastern Yilgarn craton of Western Australia was largely shaped by transpression. Local shortening induced by sinistral strike-slip on right-stepping, NNW-trending regional shear zones led to the development of N- to NNE-trending folds and reverse faults within the Laverton, Duketon and Yandal restraining jogs, and at the northwestern termination of the Kilkenny shear zone. The restraining jogs formed late in the tectonic history of the area, and each contains a diagonal transfer shear zone that merges with the bounding shear zones. Sinistral strike-slip movement on the NNW-trending regional shear zones (D 3) followed regional folding and shortening (D 2). D 2 and D 3 were probably progressive and overlapping tectonic processes. The first deformation event (D 1) is poorly understood, but appears to have involved at least locally significant N–S thrusting. The style of deformation described herein has not been widely reported from other Archaean granite–greenstone terrains but is unlikely to be unique to the northeastern Yilgarn craton.
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