Physics
Scientific paper
Sep 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3818306m&link_type=abstract
Geophysical Research Letters, Volume 38, Issue 18, CiteID L18306
Physics
Mineral Physics: Elasticity And Anelasticity, Physical Properties Of Rocks: Wave Attenuation, Seismology: Mantle (1212, 1213, 8124)
Scientific paper
Anelasticity and diffusion creep viscosity of partially molten rock analogue were measured experimentally at various melt fractions (0.0025-0.04). The presence of even a small quantity of melt phase causes a significant increase in attenuation and dispersion, and decrease in viscosity (melt effect). Similar changes are additionally caused by the presence of a secondary solid component (chemical effect). The similitude that was observed in the anelasticity of melt-free systems when scaled by the Maxwell frequency for temperature and grain size effects was observed, too, in that of melt-bearing systems when scaled by the Maxwell frequency for melt and chemical effects. The combined melt and chemical effects on anelasticity offer a potential means of identifying small quantities of melt with seismic velocity perturbations.
McCarthy Christine
Takei Yasuko
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