The effect of pressure on partitioning of Ni and Co between silicate and iron-rich metal liquids: A diamond-anvil cell study

M. Ali Bouhifd, Andrew P. Jephcoat

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

High-pressure and high-temperature experiments have been conducted with a laser-heated diamond-anvil cell (LHDAC) to determine the partition coefficients for Ni and Co up to 42 GPa and around 2500 K. Comparison of the present experimental data with those of multi-anvil devices shows a good agreement between the different exchange partitioning coefficients. The agreement suggests conditions in LHDAC experiments can reproduce those of multi-anvil experiments in the pressure range studied. Up to the maximum pressure reached in our work, Ni and Co become less siderophile with increasing pressure, as already observed in previous studies at lower pressures. Our data, combined with lower-pressure results, suggest a magma ocean would have extended to as much as 45 GPa (near 1200 km in depth) in order to obtain homogeneous equilibrium between core-forming metals and the silicate mantle in the early Earth.

Original languageEnglish
Pages (from-to)245-255
Number of pages11
JournalEarth and Planetary Science Letters
Volume209
Issue number1-2
DOIs
Publication statusPublished - Apr 15 2003
Externally publishedYes

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Silicates
diamond anvil cell
Diamond
anvils
liquid metals
Liquid metals
silicates
partitioning
Iron
silicate
diamonds
iron
liquid
low pressure
metal
laser
cells
early Earth
experiment
partition coefficient

Keywords

  • Earth's core formation
  • High-pressure
  • Laser-heated diamond-anvil cell
  • Magma ocean
  • Metal-silicate segregation
  • Siderophile elements

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

The effect of pressure on partitioning of Ni and Co between silicate and iron-rich metal liquids : A diamond-anvil cell study. / Bouhifd, M. Ali; Jephcoat, Andrew P.

In: Earth and Planetary Science Letters, Vol. 209, No. 1-2, 15.04.2003, p. 245-255.

Research output: Contribution to journalArticle

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