F. J. Davey, M. Hampton, J. Childs, M. A. Fisher, K. Lewis, J. R. Pettinga; Structure of a growing accretionary prism, Hikurangi margin, New Zealand. Geology ; 14 (8): 663–666. doi: https://doi.org/10.1130/0091-7613(1986)14<663:SOAGAP>2.0.CO;2
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The Hikurangi margin of eastern North Island, New Zealand, represents the feather edge of the Indian plate at its convergent boundary with the subducting Pacific plate. A migrated seismic reflection profile across this margin clearly displays the structural evolution of an accretionary prism. A 25-km-wide band of “protothrusts” is delineated between the toe of the slope and a converging seamount; this illustrates an early stage in the seaward propagation of a deformation front. Landward-tilted trench-slope basins are separated by ridges that have clearly defined thrusts, which appear to sole out at a decollement. The decollement continues at an angle of only 3° beneath the 150-km-wide margin to a depth of 14 km near the coast where it coincides with an onshore zone of high seismicity.