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Anatomy of a continent-backarc transform -- the Vening Meinesz Fracture Zone northwest of New Zealand
Herzer, R.H.; Mascle, J., Jean (1996). Anatomy of a continent-backarc transform -- the Vening Meinesz Fracture Zone northwest of New Zealand. Mar. Geophys. Res. 18(2-4): 401-427
In: Marine Geophysical Researches. Reidel: Dordrecht. ISSN 0025-3235, more
Peer reviewed article  

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Keywords
    Crustal structure; Faults; Fracture zones; Oceanic crust; Plate motion; Plate tectonics; PSE, New Zealand, North I. [Marine Regions]; PSE, South Pacific, Vening Meinesz Fracture Zone; Marine

Authors  Top 
  • Herzer, R.H.
  • Mascle, J.

Abstract
    The northwestern continental margin of New Zealand offers one of the finest examples of a continent-backarc transform. This transform, part of the Vening Meinesz Fracture Zone (VMFZ), accommodated about 170 km of sea-floor spreading in the Norfolk backarc basin together with eastward migration of a volcanic arc, the Three Kings Ridge, in the Mid- to Late Miocene. Before the onset of spreading, strain along the VMFZ may have been linked to a major Early Miocene obduction event - the emplacement of the Northland Allochthon. The transform is manifested by a belt up to 50 km wide of left-stepping, linear fault scarps up to 2000 m high within an approximately 100 km-wide deformed zone. A marginal ridge, the Reinga Ridge, which includes a faulted, folded and uplifted Miocene sedimentary basin, occurs within the high-standing continental side of the deformed zone, whereas a narrow strip of linear detached blocks occupies the deep backarc oceanic side.

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