Archaean chromitites show constant Fe 3+ /ΣFe in Earth's asthenospheric mantle since 3.8 Ga
作者： Hugh Rollinson , Jacob Adetunji , Davide Lenaz , Kristoffer Szilas
DOI: 10.1016/J.LITHOS.2017.03.020
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摘要: Abstract Theoretical and planetary studies show that the Earth's upper mantle is more oxidised than it should be. The mechanism by which this took place timing of oxidation contested. Here we present new Mossbauer spectroscopy measurements ionic ratio Fe 3 + /(Fe + Fe 2 + ) in mineral chromite hosted mantle-derived melts to there no change before after atmosphere at ca. 2.4 Ga over Earth history from 3.8 Ga 95 Ma. Our finding supports view asthenospheric was very early oxygenation not directly coupled processes.
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