Ferric iron stabilization at deep magma ocean conditions
收藏DataCite Commons2026-01-30 更新2026-04-25 收录
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https://datadryad.org/dataset/doi:10.5061/dryad.612jm64b0
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资源简介：
Fe2O3 produced in a deep magma ocean in equilibrium with
core-destined alloy sets the early redox budget and atmospheric
composition of terrestrial planets. Previous experiments (≤28 GPa) and
first-principles calculations indicate that a deep terrestrial magma ocean
produces appreciable Fe3+, but predict Fe3+/ΣFe that conflict by an order
of magnitude. We present Fe3+/ΣFe of glasses quenched from melts
equilibrated with Fe-alloy at 38-71 GPa, 3600-4400 K, analyzed by
synchrotron Mössbauer spectroscopy. These indicate Fe3+/ΣFe of 0.056-0.112
in a terrestrial magma ocean with mean alloy-silicate equilibration
pressures of 28-53 GPa, producing sufficient Fe2O3 to account for
the modern bulk silicate Earth redox budget and surficial
conditions near or more oxidizing than the iron-wüstite buffer, which
would stabilize a primitive CO- and H2O- rich atmosphere.
提供机构：
Dryad
创建时间：
2026-01-30
