New accurate elastic parameters for the forsterite-fayalite solid solution

被引：32

作者：

Nestola, F. ^{[1
,2
]}

Pasqual, D. ^{[1
]}

Smyth, J. R. ^{[3
]}

Novella, D. ^{[4
]}

Secco, L. ^{[1
]}

Manghnani, M. H. ^{[5
]}

Dal Negro, A. ^{[1
]}

机构：

[1] Univ Padua, Dipartimento Geosci, I-35131 Padua, Italy

[2] UO Padova, CNR IGG, I-35131 Padua, Italy

[3] Univ Colorado, Dept Geol Sci, Boulder, CO 80309 USA

[4] Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany

[5] Univ Hawaii, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA

来源：

AMERICAN MINERALOGIST | 2011年 / 96卷 / 11-12期

关键词：

Olivine; diffraction; pressure; elasticity; SINGLE-CRYSTAL FORSTERITE; HIGH-PRESSURE; TRANSITION ZONE; UPPER-MANTLE; GPA; TEMPERATURE; COMPRESSION; BEHAVIOR; OLIVINES; CLINOPYROXENE;

D O I：

10.2138/am.2011.3829

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Three natural olivines with Fo(80)Fa(20), Fo(71)Fa(29), and Fo(62)Fa(38) compositions were investigated in situ at high pressure by single-crystal X-ray diffraction using a diamond-anvil cell up to similar to 8 GPa at room temperature. The bulk modulus, K-T0, and its first pressure derivative, K', do not show any significant variation among the compositions investigated and, using the data on a further sample with Fo(92)Fa(8) composition recently investigated in the same laboratory and using the same experimental technique, we obtain, for the first time, a single equation of state for the entire Fo(92)Fa(8)-Fo(62)Fa(38) compositional range. The equation has the following coefficients: K-T0 = 124.7(9) GPa and K' = 5.3(3) and can be used for thermodynamic calculations involving the most common mantle olivine compositions.

引用

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页码：1742 / 1747

页数：6

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