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Article
REVEL: A Model for Recent Plate Velocities from Space Geodesy
Journal of Geophysical Research: Solid Earth
  • Giovanni F. Sella, Louisiana State University
  • Timothy H. Dixon, University of Miami
  • Ailin Mao, University of Miami
Document Type
Article
Publication Date
4-1-2002
Keywords
  • Plate tectonics,
  • geodesy,
  • GPS,
  • global plate model,
  • present-day,
  • REVEL
Digital Object Identifier (DOI)
https://doi.org/10.1029/2000JB000033
Disciplines
Abstract

We present a new global model for Recent plate velocities, REVEL, describing the relative velocities of 19 plates and continental blocks. The model is derived from publicly available space geodetic (primarily GPS) data for the period 1993–2000. We include an independent and rigorous estimate for GPS velocity uncertainties to assess plate rigidity and propagate these uncertainties to the velocity estimates. The velocity fields for North America, Eurasia, and Antarctica clearly show the effects of glacial isostatic adjustment, and Australia appears to depart from rigid plate behavior in a manner consistent with the mapped intraplate stress field. Two thirds of tested plate pairs agree with the NUVEL-1A geologic (3 Myr average) velocities within uncertainties. Three plate pairs (Caribbean–North America, Caribbean–South America, and North America–Pacific) exhibit significant differences between the geodetic and geologic model that may reflect systematic errors in NUVEL-1A due to the use of seafloor magnetic rate data that do not reflect the full plate rate because of tectonic complexities. Most other differences probably reflect real velocity changes over the last few million years. Several plate pairs (Arabia–Eurasia, Arabia–Nubia, Eurasia–India) move more slowly than the 3 Myr NUVEL-1A average, perhaps reflecting long-term deceleration associated with continental collision. Several other plate pairs, including Nazca–Pacific, Nazca–South America and Nubia–South America, are experiencing slowing that began ∼25 Ma, the beginning of the current phase of Andean crustal shortening.

Rights Information
Default Rights Statement
Citation / Publisher Attribution

Journal of Geophysical Research, v. 107, issue B4, art. 2081

Copyright 2002 by the American Geophysical Union.

Citation Information
Giovanni F. Sella, Timothy H. Dixon and Ailin Mao. "REVEL: A Model for Recent Plate Velocities from Space Geodesy" Journal of Geophysical Research: Solid Earth Vol. 107 Iss. B4 (2002)
Available at: http://works.bepress.com/timothydixon/105/