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Extinct 244 Pu in Ancient Zircons

Turner, Graeme; Harrison, Timothy; Holland, Greg; Mojzsis, Stephen; Gilmour, Jamie

Description

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...[Show more]

CollectionsANU Research Publications
Date published: 2004
Type: Journal article
URI: http://hdl.handle.net/1885/86255
Source: Science
DOI: 10.1126/science.1101014

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