Anomalous sound velocities in polycrystalline MgO under non-hydrostatic compression

被引：10

作者：

Gleason, A. E. ^{[1
]}

Marquardt, H. ^{[2
]}

Chen, B. ^{[1
]}

Speziale, S. ^{[2
]}

Wu, J. ^{[3
]}

Jeanloz, R. ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA

[2] GFZ German Res Ctr Geosci, D-14473 Potsdam, Germany

[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2011年 / 38卷

基金：

美国国家科学基金会;

关键词：

SINGLE-CRYSTAL ELASTICITY; BRILLOUIN-SCATTERING; SUBDUCTION ZONES; LOWER MANTLE; STRESS DROP; GPA; EARTHQUAKES; CERAMICS; STRENGTH; EQUATION;

D O I：

10.1029/2010GL045860

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Brillouin scattering from polycrystalline MgO (periclase) non-hydrostatically compressed to, and decompressed from, 60 GPa at room temperature documents shearand compressional-wave velocities similar to 20% lower than values measured under hydrostatic compression. Calculations reveal that wave velocities can be lowered due to the elastic effects of non-hydrostatic stresses, but by only a few percent. Neither these elastic effects nor preferred orientation can account for the reduction in the sound velocity. Citation: Gleason, A. E., H. Marquardt, B. Chen, S. Speziale, J. Wu, and R. Jeanloz (2011), Anomalous sound velocities in polycrystalline MgO under non-hydrostatic compression, Geophys. Res. Lett., 38, L03304, doi: 10.1029/2010GL045860.

引用

页数：4

共 34 条

[1] Ultrafast high strain rate acoustic wave measurements at high static pressure in a diamond anvil cell [J].

Armstrong, Michael R. ;

Crowhurst, Jonathan C. ;

Reed, Evan J. ;

Zaug, Joseph M. .

APPLIED PHYSICS LETTERS, 2008, 92 (10)

[2] THIRD-ORDER ELASTIC MODULI OF GERMANIUM [J].

BATEMAN, T ;

MASON, WP ;

MCSKIMIN, HJ .

JOURNAL OF APPLIED PHYSICS, 1961, 32 (05) :928-&

[3] FINITE STRAIN ISOTHERM AND VELOCITIES FOR SINGLE-CRYSTAL AND POLYCRYSTALLINE NACL AT HIGH-PRESSURES AND 300-DEGREE-K [J].

BIRCH, F .

JOURNAL OF GEOPHYSICAL RESEARCH, 1978, 83 (NB3) :1257-1268

[4] 3RD-ORDER ELASTIC CONSTANTS OF GE MGO AND FUSED SIO2 [J].

BOGARDUS, EH .

JOURNAL OF APPLIED PHYSICS, 1965, 36 (08) :2504-&

[5] Plate force due to bending at subduction zones [J].

Buffett, Bruce A. .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2006, 111 (B9)

[6] A HIGH-PRESSURE TEST OF BIRCH LAW [J].

CAMPBELL, AJ ;

HEINZ, DL .

SCIENCE, 1992, 257 (5066) :66-68

[7] Elasticity, strength, and refractive index of argon at high pressures [J].

Chen, Bin ;

Gleason, A. E. ;

Yan, J. Y. ;

Koski, K. J. ;

Clark, Simon ;

Jeanloz, Raymond .

PHYSICAL REVIEW B, 2010, 81 (14)

[8] Pressureless sintering of translucent MgO ceramics [J].

Chen, Dianying ;

Jordan, Eric H. ;

Gell, Maurice .

SCRIPTA MATERIALIA, 2008, 59 (07) :757-759

[9] VARIATION OF SEISMIC SOURCE PARAMETERS AND STRESS DROPS WITHIN A DESCENDING SLAB AND ITS IMPLICATIONS IN PLATE MECHANICS [J].

CHUNG, WY ;

KANAMORI, H .

PHYSICS OF THE EARTH AND PLANETARY INTERIORS, 1980, 23 (02) :134-159

[10] Effects of plate bending and fault strength at subduction zones on plate dynamics [J].

Conrad, CP ;

Hager, BH .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 1999, 104 (B8) :17551-17571

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