Résumé
The GEODYNZ-SUD cruise Leg 2, carried out southwest of New Zealand, studied the structural transition zones between (from north to south): the transpressive regime of the Alpine Fault, the oblique subduction under the Fiordland margin and the incipient intra-oceanic subduction under the Macquarie Ridge. To the north, above the eastward subducted Australian plate, the Milford-Fiordland trough inner wall is entirely cut by at least four northeast trending (slightly oblique to the margin) strike-slip faults that converge towards the Alpine Fault transpressive system. To the south strike-slip deformation is exclusively at the Macquarie Ridge summit.