Temperature derivatives of elastic moduli of MgSiO3 perovskite

Yoshitaka Aizawa, Akira Yoneda, Tomoo Katsura, Eiji Ito, Toshiaki Saito, Isao Suzuki

    Research output: Contribution to journalArticlepeer-review

    21 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)L01602 1-4
    JournalGeophysical Research Letters
    Volume31
    Issue number1
    DOIs
    Publication statusPublished - Jan 16 2004

    ASJC Scopus subject areas

    • Geophysics
    • Earth and Planetary Sciences(all)

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