Unfolding the Wadati-Benioff zone in the Kermadec-New Zealand region

Details Unfolding the Wadati-Benioff zone in the Kermadec-New Zealand region Unfolding the Wadati-Benioff zone in the Kermadec-New Zealand region

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pepi...44..274a&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 44, Issue 3, p. 274-280.

Physics

10

Scientific paper

As the deep seismic zones are associated with subducted oceanic crust, it is important to establish the extent and continuity of each of these zones, using consistent earthquake locations. Then the former oceanic crust can be restored to the surface of the Earth by unfolding the seismic zone about the trench. This unfolded crust should be used in plate reconstructions.
This process has been carried out for the deep seismic zone in the Kermadec-New Zealand region, where the deep seismic zone is defined by a careful selection of I.S.C. hypocenters and the former oceanic crust is established by unfolding. Plate reconstructions using two sets of rotation poles show that the deepest parts of the observed seismic zone along its length were not subducted at the same time. Further the currently observable zone is not directly associated with earlier volcanism in northwest New Zealand between 6 and 20 Ma ago.

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