Large tectonic rotation of part of New Zealand in the last 5 Ma

Details Large tectonic rotation of part of New Zealand in the last 5 Ma Large tectonic rotation of part of New Zealand in the last 5 Ma

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986e%26psl..80..348w&link_type=abstract

Earth and Planetary Science Letters, Volume 80, Issue 3-4, p. 348-352.

Physics

24

Scientific paper

Detailed paleomagnetic data from the Wairoa Syncline, a middle Miocene to the present forearc basin on the East Coast of the North Island, New Zealand, show that the rate of clockwise rotation for the last 5 Ma has been 7-8°/Ma of which less than 1.5°/Ma can be explained by apparent polar wander due to motion of the Australian or Pacific plates. This rotation is similar to a present-day rate of 7°/Ma determined from geodetic data. Between 5 and 20 Ma ago the rate of tectonic rotation is poorly determined and may be between 0° and 2°/Ma.
The change in the rate of rotation of the Wairoa Syncline around 5 Ma is probably related to a markedly different tectonic style in the New Zealand region within the last 5 Ma, associated with a change in position of the Euler poles of rotation for the Pacific-Australian plates.

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