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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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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    Mayama, N., Suzuki, I., Saito, T., Ohno, I., Katsura, T., & Yoneda, A. (2004). Temperature dependence of elastic moduli of β-(Mg, Fe )2SiO4. Geophysical Research Letters, 31(4), L04612 1-4. https://doi.org/10.1029/2003GL019247