Effect of recent revisions to the geomagnetic reversal time scale on estimates of current plate motions

来自 Wiley

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338

作者：

C Demets，RG Gordon，DF Argus，S Stein

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摘要：

Recent revisions to the geomagnetic time scale indicate that global plate motion model NUVEL-1 should be modified for comparison with other rates of motion including those estimated from space geodetic measurements. The optimal recalibration, which is a compromise among slightly different calibrations appropriate for slow, medium, and fast rates of seafloor spreading, is to multiply NUVEL-1 angular velocities by a constant, , of 0.9562. We refer to this simply recalibrated plate motion model as NUVEL-1A, and give correspondingly revised tables of angular velocities and uncertainties. Published work indicates that space geodetic rates are slower on average than those calculated from NUVEL-1 by 6±1%. This average discrepancy is reduced to less than 2% when space geodetic rates are instead compared with NUVEL-1A.

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关键词：

Theoretical or Mathematical/ geochronology geomagnetic variations tectonics/ geomagnetic reversal time scale current plate motions recalibrated global plate motion model NUVEL-1A optimal recalibration seafloor spreading rates angular velocities space geodetic measurements/ A9125L Geomagnetic temporal variations and reversals A9145D Plate tectonics A9135N Geochronology