Interpretation of the low velocity zone in terms of the presence of thermally activated point defects
- 1 August 1978
- journal article
- Published by American Geophysical Union (AGU) in Geophysical Research Letters
- Vol. 5 (8) , 629-632
- https://doi.org/10.1029/gl005i008p00629
Abstract
Experimental and theoretical work indicates that point defects can significantly affect sound velocities. Since point defects may exist in thermal equilibrium, their effect on sound velocities may be calculated as an activation phenomenon. Alternatively, activation parameters may be calculated from sound velocity data. Because of the shape of the goetherm it is possible to treat the low velocity zone using the theory of activated processes. The activation parameters calculated from Vp and Vs are in reasonable agreement with one another and with values determined from laboratory experiments on electrical conductivity of olivine and orthopyroxene.Keywords
This publication has 23 references indexed in Scilit:
- Electrical conduction in rocks and minerals: Parameters for interpretationPhysics of the Earth and Planetary Interiors, 1975
- Segregation of Magma from a Mostly Crystalline MushGSA Bulletin, 1974
- The Electrical Conductivity of PyroxeneThe Journal of Geology, 1973
- High attenuation and the low-velocity zonePhysics of the Earth and Planetary Interiors, 1973
- Partial melting and the low-velocity zonePhysics of the Earth and Planetary Interiors, 1970
- Physical mechanisms of seismic‐wave attenuationReviews of Geophysics, 1970
- Partial melting in the upper mantlePhysics of the Earth and Planetary Interiors, 1970
- Elastic relaxation model for seismic wave attenuation in the earthPhysics of the Earth and Planetary Interiors, 1969
- Two-component Flow Model for Convection in the Earth's Upper MantleNature, 1968
- Density distribution and constitution of the mantleReviews of Geophysics, 1964