Crust-mantle structure of the central North Island, New Zealand, based on seismological observations
Two geophysical features characterise the anomalous crust-mantle structure beneath central North Island of New Zealand: the apparent thinning of the felsic crust by a factor of at least 50%, and upper mantle P-wave velocities (Pn phase) about 10% less than normal (∼ 7.3-7.4 km/s). Pn velocities increase slowly to a maximum of ∼ 7.8 km/s at a depth of about 80-100 km. Above a depth of 15 km seismic P-wave velocities (Vp) are 6 km/s or less, representing what is likely to be a mix of the original...[Show more]
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|Source:||Journal of Volcanology and Geothermal Research|
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