A Model for the Upper Mantle with Several Channels of Low Velocity and Strength

  1. Leon Knopoff,
  2. Charles L. Drake and
  3. Pembroke J. Hart
  1. R. Z. Tarakanov and
  2. N. V. Leviy

Published Online: 18 MAR 2013

DOI: 10.1029/GM012p0043

The Crust and Upper Mantle of the Pacific Area

The Crust and Upper Mantle of the Pacific Area

How to Cite

Tarakanov, R. Z. and Leviy, N. V. (2012) A Model for the Upper Mantle with Several Channels of Low Velocity and Strength, in The Crust and Upper Mantle of the Pacific Area (eds L. Knopoff, C. L. Drake and P. J. Hart), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM012p0043

Author Information

  1. Sakhalin Complex Scientific Research Institute, Novo-Alexandrovsk, Sakhalin, USSR

Publication History

  1. Published Online: 18 MAR 2013
  2. Published Print: 20 APR 2012

Book Series:

  1. Geophysical Monograph Series

Book Series Editors:

  1. Waldo E. Smith

ISBN Information

Print ISBN: 9780875900124

Online ISBN: 9781118663738

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Keywords:

  • Amplitude curves;
  • Earthquakes;
  • Kamchatka volcanoes;
  • Kuril-Japanese Island and Abyssal fracture zones;
  • Low-velocity layer;
  • Magma-formation areas;
  • P-wave velocity;
  • Upper mantle

Summary

A layered model for the structure of the upper mantle is proposed which provides a correlation between maximum earthquake magnitudes and the velocities and amplitudes of P waves. Four layers of low velocity and strength are distinguished within the upper mantle at depths of 60–90, 120–160, 220–300, and 370–430 km, respectively. As a consequence of this model, the areas most favorable to the formation of magma are the regions where the low-velocity layers are cut by abyssal fracture zones.