Earth's chondritic Th/U: Negligible fractionation during accretion, core formation, and crust–mantle differentiation

@article{Wipperfurth2018EarthsCT,
  title={Earth's chondritic Th/U: Negligible fractionation during accretion, core formation, and crust–mantle differentiation},
  author={S. A. Wipperfurth and M. Guo and Ondvrej vSr'amek and W. Mcdonough},
  journal={Earth and Planetary Science Letters},
  year={2018},
  volume={498},
  pages={196-202}
}
  • S. A. Wipperfurth, M. Guo, +1 author W. Mcdonough
  • Published 2018
  • Physics, Geology
  • Earth and Planetary Science Letters
  • Abstract Radioactive decay of potassium (K), thorium (Th), and uranium (U) power the Earth's engine, with variations in 232Th/238U recording planetary differentiation, atmospheric oxidation, and biologically mediated processes. We report several thousand 232Th/238U (κ) and time-integrated Pb isotopic ( κ P b ) values and assess their ratios for the Earth, core, and silicate Earth. Complementary bulk silicate Earth domains (i.e., continental crust κ P b C C = 3.95 − 0.13 + 0.19 and modern mantle… CONTINUE READING

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    References

    Publications referenced by this paper.
    SHOWING 1-10 OF 44 REFERENCES
    Earth's Uranium and Thorium content and geoneutrinos fluxes based on enstatite chondrites
    14
    Metal–silicate partitioning of U: Implications for the heat budget of the core and evidence for reduced U in the mantle
    28
    A coherent crust-mantle model for the uranium-thorium-lead isotopic system
    58
    A Mercury-like component of early Earth yields U in the core and high mantle 142Nd
    49
    EXPLORING THE KAPPA CONUNDRUM : THE ROLE OF RECYCLING IN THE LEAD ISOTOPE EVOLUTION OF THE MANTLE
    98
    Constraints on the 232Th/238U ratio (κ) of the continental crust
    19
    The terrestrial uranium isotope cycle
    87