Imprint of the North American plate in Siberia revealed by GPS

  • G. M. Steblov
    Geophysical Service Russian Academy of Sciences Obninsk Russia
  • M. G. Kogan
    Lamont‐Doherty Earth Observatory of Columbia University Palisades New York USA
  • R. W. King
    Department of Earth, Atmospheric, and Planetary Sciences, MIT Cambridge Massachusetts USA
  • C. H. Scholz
    Lamont‐Doherty Earth Observatory of Columbia University Palisades New York USA
  • R. Bürgmann
    Department of Earth and Planetary Science University of California Berkeley California USA
  • D. I. Frolov
    Ioffe Institute of Physics and Technology Russian Academy of Sciences St. Petersburg Russia

説明

<jats:p>GPS observations in east Siberia combined with global observations, collected 1995–2002, place constraints on the geometry and motions of the Eurasian, North American, and Pacific plates in east Asia. By comparing velocities relative to Eurasia and to North America, we conclude that east Siberia to the east of the Cherskiy Range belongs to the North American plate, hypothesized for three decades but not proven because of uncertainties with the plate boundary arising from the ambiguous seismicity. Smaller plates in east Asia, such as Okhotsk and Amurian, can neither be resolved nor excluded by the GPS velocities.</jats:p>

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