Quantifying the effect of solid phase composition and structure on solid-liquid partitioning of siderophile and chalcophile elements in the iron-sulfur system

N. Rai, S. Ghosh, M. Wälle, W. van Westrenen

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We report experimentally determined partition coefficients between solid and liquid phases for bulk compositions on either side of the Fe-FeS eutectic for a suite of siderophile, chalcophile, and lithophile elements. Experiments were performed at conditions of 1.5 and 2. GPa in pressure ( P), 1323. K in temperature ( T), and virtually identical eutectic sulfide liquid compositions in equilibrium with either solid face centered cubic Fe or solid FeS. This enabled isolation of the effect of solid phase composition and structure from pressure-temperature-melt composition effects. Solid phase-liquid metal partition coefficients ( D values) for Ge, Re, Ni, Co, Cr, Mn, V, Sn, Pb, Re and W differ significantly if partitioning occurs between identical metallic liquids but different solid phases, whereas Zn, Cu and Mo are virtually unaffected. For all elements except Ge and Sn, measured solid Fe-liquid sulfide partition coefficients at 1.5 and 2. GPa are inconsistent with model predictions based on atmospheric pressure experiments, indicating that such models may not be appropriate for modeling core crystallization processes at non-ambient pressure.The framework of a lattice strain-based model of solid-liquid metal partitioning (Stewart et al., 2009) enables us to quantify the effect of the solid phase. Changing the solid phase from Fe to FeS leads to systematic increases in r
Original languageEnglish
Pages (from-to)85-94
JournalChemical Geology
Volume357
DOIs
Publication statusPublished - 2013

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Phase structure
Sulfur
Phase composition
partitioning
Iron
sulfur
iron
liquid
Liquids
partition coefficient
Sulfides
Liquid metals
Eutectics
sulfide
effect
Composition effects
metal
Crystallization
Chemical analysis
atmospheric pressure

Cite this

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title = "Quantifying the effect of solid phase composition and structure on solid-liquid partitioning of siderophile and chalcophile elements in the iron-sulfur system",
abstract = "We report experimentally determined partition coefficients between solid and liquid phases for bulk compositions on either side of the Fe-FeS eutectic for a suite of siderophile, chalcophile, and lithophile elements. Experiments were performed at conditions of 1.5 and 2. GPa in pressure ( P), 1323. K in temperature ( T), and virtually identical eutectic sulfide liquid compositions in equilibrium with either solid face centered cubic Fe or solid FeS. This enabled isolation of the effect of solid phase composition and structure from pressure-temperature-melt composition effects. Solid phase-liquid metal partition coefficients ( D values) for Ge, Re, Ni, Co, Cr, Mn, V, Sn, Pb, Re and W differ significantly if partitioning occurs between identical metallic liquids but different solid phases, whereas Zn, Cu and Mo are virtually unaffected. For all elements except Ge and Sn, measured solid Fe-liquid sulfide partition coefficients at 1.5 and 2. GPa are inconsistent with model predictions based on atmospheric pressure experiments, indicating that such models may not be appropriate for modeling core crystallization processes at non-ambient pressure.The framework of a lattice strain-based model of solid-liquid metal partitioning (Stewart et al., 2009) enables us to quantify the effect of the solid phase. Changing the solid phase from Fe to FeS leads to systematic increases in r",
author = "N. Rai and S. Ghosh and M. W{\"a}lle and {van Westrenen}, W.",
year = "2013",
doi = "10.1016/j.chemgeo.2013.08.029",
language = "English",
volume = "357",
pages = "85--94",
journal = "Chemical Geology",
issn = "0009-2541",
publisher = "Elsevier",

}

Quantifying the effect of solid phase composition and structure on solid-liquid partitioning of siderophile and chalcophile elements in the iron-sulfur system. / Rai, N.; Ghosh, S.; Wälle, M.; van Westrenen, W.

In: Chemical Geology, Vol. 357, 2013, p. 85-94.

Research output: Contribution to JournalArticleAcademicpeer-review

TY - JOUR

T1 - Quantifying the effect of solid phase composition and structure on solid-liquid partitioning of siderophile and chalcophile elements in the iron-sulfur system

AU - Rai, N.

AU - Ghosh, S.

AU - Wälle, M.

AU - van Westrenen, W.

PY - 2013

Y1 - 2013

N2 - We report experimentally determined partition coefficients between solid and liquid phases for bulk compositions on either side of the Fe-FeS eutectic for a suite of siderophile, chalcophile, and lithophile elements. Experiments were performed at conditions of 1.5 and 2. GPa in pressure ( P), 1323. K in temperature ( T), and virtually identical eutectic sulfide liquid compositions in equilibrium with either solid face centered cubic Fe or solid FeS. This enabled isolation of the effect of solid phase composition and structure from pressure-temperature-melt composition effects. Solid phase-liquid metal partition coefficients ( D values) for Ge, Re, Ni, Co, Cr, Mn, V, Sn, Pb, Re and W differ significantly if partitioning occurs between identical metallic liquids but different solid phases, whereas Zn, Cu and Mo are virtually unaffected. For all elements except Ge and Sn, measured solid Fe-liquid sulfide partition coefficients at 1.5 and 2. GPa are inconsistent with model predictions based on atmospheric pressure experiments, indicating that such models may not be appropriate for modeling core crystallization processes at non-ambient pressure.The framework of a lattice strain-based model of solid-liquid metal partitioning (Stewart et al., 2009) enables us to quantify the effect of the solid phase. Changing the solid phase from Fe to FeS leads to systematic increases in r

AB - We report experimentally determined partition coefficients between solid and liquid phases for bulk compositions on either side of the Fe-FeS eutectic for a suite of siderophile, chalcophile, and lithophile elements. Experiments were performed at conditions of 1.5 and 2. GPa in pressure ( P), 1323. K in temperature ( T), and virtually identical eutectic sulfide liquid compositions in equilibrium with either solid face centered cubic Fe or solid FeS. This enabled isolation of the effect of solid phase composition and structure from pressure-temperature-melt composition effects. Solid phase-liquid metal partition coefficients ( D values) for Ge, Re, Ni, Co, Cr, Mn, V, Sn, Pb, Re and W differ significantly if partitioning occurs between identical metallic liquids but different solid phases, whereas Zn, Cu and Mo are virtually unaffected. For all elements except Ge and Sn, measured solid Fe-liquid sulfide partition coefficients at 1.5 and 2. GPa are inconsistent with model predictions based on atmospheric pressure experiments, indicating that such models may not be appropriate for modeling core crystallization processes at non-ambient pressure.The framework of a lattice strain-based model of solid-liquid metal partitioning (Stewart et al., 2009) enables us to quantify the effect of the solid phase. Changing the solid phase from Fe to FeS leads to systematic increases in r

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M3 - Article

VL - 357

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EP - 94

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JF - Chemical Geology

SN - 0009-2541

ER -