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
N1 - Funding Information:
We thank K. Shouno for his cooperation in the resonance measurements, H. Yamada, C. Oka and E. Ito for their help in the high-pressure synthesis of the specimen, and A. Yamada for discussion. We thank reviewers J. Smyth and D. Isaak for constructive comments. This work was partially supported by a Grant-in Aid for Scientific Research No. 15204042 from the Japan Society for the Promotion of Science and by a grant from the COE-21 program.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
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
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U2 - 10.1016/j.pepi.2004.09.007
DO - 10.1016/j.pepi.2004.09.007
M3 - Article
AN - SCOPUS:13144304328
SN - 0031-9201
VL - 148
SP - 353
EP - 359
JO - Physics of the Earth and Planetary Interiors
JF - Physics of the Earth and Planetary Interiors
IS - 2-4
ER -