Extinct 244Pu in ancient zircons

Grenville Turner, T. Mark Harrison, Greg Holland, Stephen J. Mojzsis, Jamie Gilmour

    Research output: Contribution to journalArticlepeer-review


    We have found evidence, in the form of fissiogenic xenon isotopes, for in situ decay of 244Pu in individual 4.1- to 4.2-billion-year-old zircons from the Jack Hills region of Western Australia. Because of its short half-life, 82 million years, 244Pu was extinct within 600 million years of Earth's formation. Detrital zircons are the only known relics to have survived from this period, and a study of their Pu geochemistry will allow us to date ancient metamorphic events and determine the terrestrial Pu/U ratio for comparison with the solar ratio.
    Original languageEnglish
    Pages (from-to)89-91
    Number of pages2
    Issue number5693
    Publication statusPublished - 1 Oct 2004


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