### Abstract

The elastic moduli of polycrystalline ringwoodite, (Mg_{0.91} Fe_{0.09})_{2}SiO_{4}, were measured up to 470 K by means of the resonant sphere technique. The adiabatic bulk (K_{S}) and shear (μ) moduli were found to be 185.1(2) and 118.22(6) GPa at room temperature, and the average slopes of dK_{S}/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 language | English |
---|---|

Pages (from-to) | 353-359 |

Number of pages | 7 |

Journal | Physics of the Earth and Planetary Interiors |

Volume | 148 |

Issue number | 2-4 |

DOIs | |

Publication status | Published - Feb 2005 |

### Fingerprint

### Keywords

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

### ASJC Scopus subject areas

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

### Cite this

*Physics of the Earth and Planetary Interiors*,

*148*(2-4), 353-359. https://doi.org/10.1016/j.pepi.2004.09.007

**Temperature dependence of the elastic moduli of ringwoodite.** / Mayama, Norihito; Suzuki, Isao; Saito, Toshiaki; Ohno, Ichiro; Katsura, Tomoo; Yoneda, Akira.

Research output: Contribution to journal › Article

*Physics of the Earth and Planetary Interiors*, vol. 148, no. 2-4, pp. 353-359. https://doi.org/10.1016/j.pepi.2004.09.007

}

TY - JOUR

T1 - Temperature dependence of the elastic moduli of ringwoodite

AU - Mayama, Norihito

AU - Suzuki, Isao

AU - Saito, Toshiaki

AU - Ohno, Ichiro

AU - Katsura, Tomoo

AU - Yoneda, Akira

PY - 2005/2

Y1 - 2005/2

N2 - 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.

AB - 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.

KW - 520km discontinuity

KW - Elastic moduli

KW - High temperature

KW - Ringwoodite

UR - http://www.scopus.com/inward/record.url?scp=13144304328&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=13144304328&partnerID=8YFLogxK

U2 - 10.1016/j.pepi.2004.09.007

DO - 10.1016/j.pepi.2004.09.007

M3 - Article

AN - SCOPUS:13144304328

VL - 148

SP - 353

EP - 359

JO - Physics of the Earth and Planetary Interiors

JF - Physics of the Earth and Planetary Interiors

SN - 0031-9201

IS - 2-4

ER -