Temperature dependence of elastic moduli of β-(Mg, Fe)2SiO4 -: art. no. L04612

被引：25

作者：

Mayama, N ^{[1
]}

Suzuki, I

Saito, T

Ohno, I

Katsura, T

Yoneda, A

机构：

[1] Okayama Univ, Dept Earth Sci, Okayama 7008530, Japan

[2] Ehime Univ, Dept Earth Sci, Matsuyama, Ehime, Japan

[3] Okayama Univ, Inst Study Earths Interior, Tottori 68201, Japan

来源：

GEOPHYSICAL RESEARCH LETTERS | 2004年 / 31卷 / 04期

关键词：

D O I：

10.1029/2003GL019247

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The elastic moduli of polycrystalline wadsleyite, beta-(Mg0.91Fe0.09)(2)SiO4, were measured up to 470 K by means of the resonant sphere technique. The adiabatic bulk (K-S) and shear (mu) moduli were found to be 165.72( 6) and 105.43(2) GPa at room temperature. The average slopes (dK(S)/dT and dmu/dT) in the range were determined to be - 0.0175(3) and - 0.0159(1) GPa/K. We estimated that the P-, S-wave velocity and density jumps for the alpha- to beta-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.

引用

页码：L046121 / 4

页数：4

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