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High Pressure Research
An International Journal
Volume 5, 1990 - Issue 1-6
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GEO- and planetary sciences

Structure of the mantle discontinuities

O. L. Kuskov V. I. Vernadsky Institute of Geochemistry and Analytical Chemistry USSR Academy of Sciences, 117334, Moscow, USSR
&
A. B. Panferov V. I. Vernadsky Institute of Geochemistry and Analytical Chemistry USSR Academy of Sciences, 117334, Moscow, USSR
Pages 714-716 | Published online: 01 Dec 2006
 
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Abstract

The results of thermodynamic calculations in the FeO-MgO-SiO2 (FMS) system show that the elastic properties and density across the 400-km discontinuity might be consistent with a transition zone of isochemical pyrolite composition and do not require chemical stratification. However, phase changes in pyrolite do not explain the 650-km discontinuity.

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