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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]

dc.contributor.authorTurner, Graeme
dc.contributor.authorHarrison, Timothy
dc.contributor.authorHolland, Greg
dc.contributor.authorMojzsis, Stephen
dc.contributor.authorGilmour, Jamie
dc.date.accessioned2015-12-13T23:07:32Z
dc.date.available2015-12-13T23:07:32Z
dc.identifier.issn0036-8075
dc.identifier.urihttp://hdl.handle.net/1885/86255
dc.description.abstractWe 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.
dc.publisherAmerican Association for the Advancement of Science
dc.sourceScience
dc.subjectKeywords: Fission products; Geochemistry; Geographical regions; Isotopes; Metamorphic rocks; Plutonium compounds; Solar radiation; Metamorphism; Solar ratio; Xenon isotopes; Zircon; isotope; plutonium; xenon; zirconium; lead; silicate; uranium; geochronology; pluto
dc.titleExtinct 244 Pu in Ancient Zircons
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume306
dc.date.issued2004
local.identifier.absfor040203 - Isotope Geochemistry
local.identifier.ariespublicationMigratedxPub15071
local.type.statusPublished Version
local.contributor.affiliationTurner, Graeme, University of Queensland
local.contributor.affiliationHarrison, Timothy, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationHolland, Greg, University of Manchester
local.contributor.affiliationMojzsis, Stephen, University of Colorado
local.contributor.affiliationGilmour, Jamie, University of Manchester
local.bibliographicCitation.startpage89
local.bibliographicCitation.lastpage91
local.identifier.doi10.1126/science.1101014
dc.date.updated2016-02-24T09:47:20Z
local.identifier.scopusID2-s2.0-6044256053
CollectionsANU Research Publications

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