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Geochemistry

Does U–Pb date Earth's core formation?; How well can Pb isotopes date core formation? (Reply)

Naturevolume 444pagesE2E3 (2006) | Download Citation

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Abstract

Yin and Jacobsen1 and Kamber and Kramers2 highlight several issues to do with the tungsten (W) and lead (Pb) isotopic chronometry of terrestrial accretion and core segregation, although none of these affect our model or conclusions3. Yin and Jacobsen1 suggest that it is not clear from our analysis3 that 182Hf−182W provides a reliable system of chronometry for the bulk of core formation, whereas 235/238U−207/206Pb relates to the very last stage of sulphide segregation —which was exactly our point3 and is clarified here.

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References

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Affiliations

  1. Department of Earth and Planetary Sciences, Macquarie University, New South Wales, 2109, Australia

    • B. J. Wood
  2. Department of Earth Sciences, University of Oxford, Parks Road, Oxford, OX1 3PR, UK

    • A. N. Halliday

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Correspondence to A. N. Halliday.

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https://doi.org/10.1038/nature05360

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