No-net-rotation model of current plate velocities incorporating plate motion model NUVEL-1

摘要: We present NNR-NUVEL1, a model of plate velocities relative to the unique reference frame defined by requiring no-net-rotation lithosphere while constraining equal those in global motion NUVEL-1 [DeMets et al., 1990]. Differences between NNR-NUVEL1 and AM0-2 [Minster Jordan, 1978] are as large 15 mm/yr. In Pacific rotates right-handed sense at 0.67°/m.y. about 63°S, 107°E. This rotation nearly parallels, but is 32% slower than, Pacific-hotspot Euler vector HS2-NUVEL1, which plate-hotspot constrained consistency with [Gripp Gordon, At Hawaii moves 70 mm/yr, 25 mm/yr than hotspots. HS2-NUVEL1 described completely 0.33°/m.y. 49°S, 65°E. The 99% confidence ellipsoids for exclude corresponding vectors from NNR-NUVELl. Thus differs significantly hotspot frame. If difference frames caused hotspots mean mantle frame, then beneath move coherent towards east-southeast. Alternatively, may show that uniform drag, no-net-torque kinematically equivalent based on dynamically incorrect premise. Possible exceptions assumption drag include net torque due attached subducting slabs greater resistance continents oceans.