Velocity and attenuation in partially molten rocks

Details Velocity and attenuation in partially molten rocks Velocity and attenuation in partially molten rocks

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.5173m&link_type=abstract

(Stanford University, Conference on Seismic Wave Attenuation, Stanford University, Stanford, Calif., June 25-27, 1979.) Journal

Physics

58

Acoustic Propagation, Igneous Rocks, Melts (Crystal Growth), Petrology, Seismology, Olivine, P Waves, Plane Strain, Pyroxenes, S Waves, Shear Stress

Scientific paper

Seismic velocity and attenuation are estimated in rocks in which the melt phase has tube geometry and compared to models with the melt distributed as spheres or thin films. Tubes have moduli intermediate between rigid spherical inclusions and compliant films: in polycrystalline olivine at 20 kbar, the model projects a decrease of S wave velocity of 10% and in P velocity of 5% at the 0.05 melt fraction. Shear attenuation is dominated by viscous flow of melt between the tubes and/or films. For olivine, the tube model predicts the increment of relaxation due to melt to be 0.01 at the 0.05 melt fraction.

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