Temperature derivatives of elastic moduli of MgSiO3 perovskite

Details Temperature derivatives of elastic moduli of MgSiO3 perovskite Temperature derivatives of elastic moduli of MgSiO3 perovskite

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3101602a&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 1, CiteID L01602

Physics

10

Mineral Physics, Mineral Physics: Elasticity And Anelasticity, Mineral Physics: Instruments And Techniques

Scientific paper

Elastic properties of polycrystalline MgSiO3 perovskite were determined by means of resonance sphere technique at temperatures from 258 to 318 K under atmospheric pressure. The temperature derivatives of adiabatic bulk (∂KS/∂T)P and shear moduli (∂G/∂T)P are -0.029(2) GPa/K and -0.024(1) GPa/K, respectively. Applying the present results in interpretation of seismological observations, we suggest that the chemical composition of the earth's lower mantle is pyrolitic at the potential temperature of 1600 K.

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