A Combined Study of the Influence of Melting, Temperature, and Chemical Composition on Seismic Wave Velocities
Abstract
Seismic body waves provide a wealth of information on the internal structure of the Earth. On their path from the source to receiver, the waves encounter a variety of environmental features, such as variation temperature, rocks of different composition, and melting. While the influence of each of these parameters on the seismic wave have been studied extensively, combined studies of the trade-off between these different factors influencing the seismic velocities are relatively few. We report synthetic seismic velocity profiles in the upper mantle, combining the effects of temperature, mantle composition, and melting. The models also include the influence of melt composition on the seismic velocity. Our results indicate that for an equilibrium melt texture, only 1 volume% melting can mimic the effect of a temperature increase of up to 500 K.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2010
- Bibcode:
- 2010AGUFMDI51B1873H
- Keywords:
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- 5102 PHYSICAL PROPERTIES OF ROCKS / Acoustic properties;
- 8130 TECTONOPHYSICS / Heat generation and transport