A no-net-rotation model of present-day surface motions

Details A no-net-rotation model of present-day surface motions A no-net-rotation model of present-day surface motions

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.4407k&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 23, p. 4407-4410

Physics

14

Geodesy And Gravity: Crustal Movements-Intraplate, Tectonophysics: Plate Boundary-General, Tectonophysics: Plate Motions-Present And Recent

Scientific paper

A significant portion of the Earth's surface consists of zones of diffuse deformation. The interior regions of these diffuse zones of deformation move at distinctly different velocities from that of adjacent plates, and, because of their complexities, have been ignored in previous no-net-rotation (NNR) models. We have calculated a new NNR model from a continuous velocity field that incorporates both rigid plate motion and velocity gradients within plate boundary zones. When compared with earlier NNR models we find significantly different angular velocities for many plates. Differences between the NNR model presented here and earlier NNR models can be attributed to the effect of including velocity gradients in diffuse plate boundary zones as well as to the actual differences between geodetically derived surface motions and geologic estimates.

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