Constraints on element partition coefficients between MgSiO3 perovskite and liquid determined by direct measurements

Takumi Kato; A. E. Ringwood; T. Irifune

doi:10.1016/0012-821X(88)90111-2

Constraints on element partition coefficients between MgSiO3 perovskite and liquid determined by direct measurements

Takumi Kato, A. E. Ringwood, T. Irifune

Material Science of Solar Planets

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76 Citations (Scopus)

Abstract

Partition coefficients for some key elements between MgSiO₃ perovskite and liquid have been obtained via direct measurements of compositions of coexisting crystals and liquid at 24.5 GPa and 2300°C in a modified chondritic bulk composition. The results confirm our earlier work [1] in showing that the MgSiO₃ perovskite-liquid distribution coefficients for Sc, Zr and Hf are substantially greater than unity whilst those for Ca and Sm are substantially smaller than unity. These results, in conjunction with the observed composition of the upper mantle contradict hypotheses which maintain that the Earth's mantle has experienced gross differentiation controlled by the fractionation of MgSiO₃ perovskite.

Original language	English
Pages (from-to)	65-68
Number of pages	4
Journal	Earth and Planetary Science Letters
Volume	90
Issue number	1
DOIs	https://doi.org/10.1016/0012-821X(88)90111-2
Publication status	Published - Jan 1 1988

All Science Journal Classification (ASJC) codes

Earth and Planetary Sciences (miscellaneous)
Geochemistry and Petrology
Geophysics
Earth and Planetary Sciences(all)
Environmental Science(all)

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10.1016/0012-821X(88)90111-2

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abstract = "Partition coefficients for some key elements between MgSiO3 perovskite and liquid have been obtained via direct measurements of compositions of coexisting crystals and liquid at 24.5 GPa and 2300°C in a modified chondritic bulk composition. The results confirm our earlier work [1] in showing that the MgSiO3 perovskite-liquid distribution coefficients for Sc, Zr and Hf are substantially greater than unity whilst those for Ca and Sm are substantially smaller than unity. These results, in conjunction with the observed composition of the upper mantle contradict hypotheses which maintain that the Earth's mantle has experienced gross differentiation controlled by the fractionation of MgSiO3 perovskite.",

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AU - Kato, Takumi

AU - Ringwood, A. E.

AU - Irifune, T.

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Y1 - 1988/1/1

N2 - Partition coefficients for some key elements between MgSiO3 perovskite and liquid have been obtained via direct measurements of compositions of coexisting crystals and liquid at 24.5 GPa and 2300°C in a modified chondritic bulk composition. The results confirm our earlier work [1] in showing that the MgSiO3 perovskite-liquid distribution coefficients for Sc, Zr and Hf are substantially greater than unity whilst those for Ca and Sm are substantially smaller than unity. These results, in conjunction with the observed composition of the upper mantle contradict hypotheses which maintain that the Earth's mantle has experienced gross differentiation controlled by the fractionation of MgSiO3 perovskite.

AB - Partition coefficients for some key elements between MgSiO3 perovskite and liquid have been obtained via direct measurements of compositions of coexisting crystals and liquid at 24.5 GPa and 2300°C in a modified chondritic bulk composition. The results confirm our earlier work [1] in showing that the MgSiO3 perovskite-liquid distribution coefficients for Sc, Zr and Hf are substantially greater than unity whilst those for Ca and Sm are substantially smaller than unity. These results, in conjunction with the observed composition of the upper mantle contradict hypotheses which maintain that the Earth's mantle has experienced gross differentiation controlled by the fractionation of MgSiO3 perovskite.

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Constraints on element partition coefficients between MgSiO3 perovskite and liquid determined by direct measurements

Abstract

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