Temperature dependence of elastic moduli of β-(Mg, Fe )2SiO4

Norihito Mayama, Isao Suzuki, Toshiaki Saito, Ichiro Ohno, Tomoo Katsura, Akira Yoneda

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    31 Citations (Scopus)


    The elastic moduli of polycrystalline wadsleyite, β(Mg0.91Fe0.09)2SiO4, were measured up to 470 K by means of the resonant sphere technique. The adiabatic bulk (KS) and shear (μ) moduli were found to be 165.72(6) and 105.43(2) GPa at room temperature. The average slopes (dKs/dT and dμ/dT) in the range were determined to be the -0.0175(3) and -0.0159(1) GPa/K. We estimated that the P-, S-wave velocity and density jumps for the α- to β-phase transformation at the 410-km depth condition were 9.5, 11.2 and 5.4%, respectively. These results suggest that the olivine component at the depth should be 52 and 42 volume % for P- and S-waves.

    Original languageEnglish
    Pages (from-to)L04612 1-4
    JournalGeophysical Research Letters
    Issue number4
    Publication statusPublished - Feb 28 2004

    ASJC Scopus subject areas

    • Geophysics
    • Earth and Planetary Sciences(all)


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