Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago

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doi: 10.1038/35051550
Authors:Wilde, Simon A.; Valley, John W.; Peck, William H.; Graham, Colin M.
Author Affiliations:Primary:
Curtin University of Technology, School of Applied Geology, Perth, West. Aust., Australia
Other:
University of Wisconsin, United States
University of Edinburgh, United Kingdom
Volume Title:Nature (London)
Source:Nature (London), 409(6817), p.175-178. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836
Publication Date:2001
Note:In English. 29 refs.; illus., incl. 2 tables
Summary:Analyses are presented for REE, O isotopes, U, Th, Pb and their isotopic systems, of a zircon separated from the original heavy mineral concentrate of the Jack Hills conglomerate, Western Australia, from which the oldest crystal was dated at 4276 m.y. The newly dated zircon is deep purple, has few inclusions and is a fragment of a larger crystal, and shows zoning in REE and O isotope ratios, and formed from an evolving granitic magma with δ 18O 8.5-9.50/00. Pb-U, Pb-Th and Pb-Pb isotopic ratio ages range up to 4404 ± 8 m.y., and give the earliest evidence of continental crust and oceans. [R.K.H.]
Sections:Age determination
Subjects:Absolute age; Archean; Continental crust; Crust; Dates; Detritus; Geochemistry; Gneisses; Granites; Igneous rocks; Ion probe data; Isotope ratios; Isotopes; Mass spectra; Metals; Metamorphic rocks; Nesosilicates; O-18/O-16; Orthosilicates; Oxygen; Paleoarchean; Paleoenvironment; Paleogeography; Pb/Pb; Plutonic rocks; Precambrian; Rare earths; SHRIMP data; Silicates; Spectra; Stable isotopes; U/Th/Pb; World ocean; Zircon; Zircon group; Australasia; Australia; Canada; Western Australia; Yilgarn Craton; Acasta Gneiss; Narryer Terrane
Abstract Numbers:01M/2411
Record ID:2001014606
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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