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Rate of growth of the preserved North American continental crust: Evidence from Hf and O isotopes in Mississippi detrital zircons

Wang, Yan; Campbell, Ian; Allen, Charlotte M; Williams, Ian; Eggins, Stephen


Detrital zircons from the Mississippi River have been analyzed for U-Th-Pb, Lu-Hf and O isotopes to constrain the rate of growth of the preserved North American continental crust. One hundred and forty two concordant zircon U/Pb dates on grains mounted in epoxy, obtained by Excimer laser ablation ICP-MS method, resolved six major periods of zircon crystallization: 0-0.25, 0.3-0.6, 0.95-1.25, 1.3-1.5, 1.65-1.95 and 2.5-3.0 Ga. These age ranges match the ages of the recognized lithotectonic units...[Show more]

CollectionsANU Research Publications
Date published: 2008
Type: Journal article
Source: Geochimica et Cosmochimica Acta
DOI: 10.1016/j.gca.2008.10.037


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