Seismic Wave Scattering and the Earth's Structure in the Lower Mantle

  1. D. E. Smylie and
  2. Raymond Hide
  1. R. A. W. Haddon and
  2. G. G. R. Buchbinder

Published Online: 29 MAR 2013

DOI: 10.1029/GM046p0065

Structure and Dynamics of Earth's Deep Interior

Structure and Dynamics of Earth's Deep Interior

How to Cite

Haddon, R. A. W. and Buchbinder, G. G. R. (1988) Seismic Wave Scattering and the Earth's Structure in the Lower Mantle, in Structure and Dynamics of Earth's Deep Interior (eds D. E. Smylie and R. Hide), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM046p0065

Author Information

  1. Geophysics Division, Geological Survey of Canada Energy, Mines and Resources, Ottawa, Ontario K1A 0Y3, Canada

Publication History

  1. Published Online: 29 MAR 2013
  2. Published Print: 1 JAN 1988

ISBN Information

Print ISBN: 9780875904504

Online ISBN: 9781118666562

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Keywords:

  • Earth—Core—Congresses;
  • Geodynamics—Congresses

Summary

The hypothesis of seismic wave scattering by three-dimensional heterogeneity in the lowermost mantle is shown to provide a plausible alternative to recently inferred lower mantle velocity models in which P and/or Svelocities increase discontinuously with depth by amounts of 1.5 to 3% at various levels in the lowermost few hundred kilometers of the mantle. In contrast to the stability implied by stratified structures, the required three-dimensional heterogeneity in the lowermost mantle implies strong dynamical activity in this region.