Temperature dependence of the elastic moduli of ringwoodite

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

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The elastic moduli of polycrystalline ringwoodite, (Mg0.91 Fe0.09)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 185.1(2) and 118.22(6) GPa at room temperature, and the average slopes of dKS/dT and dμ/dT in the temperature range of the study were determined to be -0.0193(9) and -0.0148(3) GPa/K, respectively. Using these results, we estimate seismic wave velocity jumps for a pure olivine mantle model at 520 km depth. We find that the jump for the S-wave velocity is about 1.5 times larger than that for the P-wave velocity at this depth. This suggests that velocity jumps at the 520 km discontinuity are easier to detect using S-waves than P-waves.

Original languageEnglish
Pages (from-to)353-359
Number of pages7
JournalPhysics of the Earth and Planetary Interiors
Volume148
Issue number2-4
DOIs
Publication statusPublished - Feb 1 2005

Keywords

  • 520km discontinuity
  • Elastic moduli
  • High temperature
  • Ringwoodite

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Geophysics
  • Physics and Astronomy (miscellaneous)
  • Space and Planetary Science

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    Mayama, N., Suzuki, I., Saito, T., Ohno, I., Katsura, T., & Yoneda, A. (2005). Temperature dependence of the elastic moduli of ringwoodite. Physics of the Earth and Planetary Interiors, 148(2-4), 353-359. https://doi.org/10.1016/j.pepi.2004.09.007