Temperature derivatives of elastic moduli of MgSiO3 perovskite -: art. no. L01602

被引：20

作者：

Aizawa, Y ^{[1
]}

Yoneda, A

Katsura, T

Ito, E

Saito, T

Suzuki, I

机构：

[1] Okayama Univ, Inst Study Earths Interior, Tottori 6820193, Japan

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

来源：

GEOPHYSICAL RESEARCH LETTERS | 2004年 / 31卷 / 01期

关键词：

D O I：

10.1029/2003GL018762

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Elastic properties of polycrystalline MgSiO3 perovskite were determined by means of resonance sphere technique at temperatures from 258 to 318 K under atmospheric pressure. The temperature derivatives of adiabatic bulk (partial derivativeK(S)/partial derivativeT)(P) and shear moduli (partial derivativeG/partial derivativeT)(P) are -0.029(2) GPa/K and -0.024(1) GPa/K, respectively. Applying the present results in interpretation of seismological observations, we suggest that the chemical composition of the earth's lower mantle is pyrolitic at the potential temperature of 1600 K.

引用

页码：L016021 / 4

页数：4

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