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Thermal events documented in Hadean zircons by ion microprobe depth profiles

Trail, Dustin; Mojzsis, Stephen; Harrison, Timothy


We report the first U-Th-Pb ion microprobe depth profiles of four Hadean zircons from the Jack Hills and Mount Narryer supracrustal belts of the Narryer Gneiss Complex (NGC), Western Australia. This ultra-high spatial resolution technique probes the age and origin of sub-micron features in individual crystals that can record episodes of zircon growth. Near-surface grain dates of 2700 Ma or older are coincident with post-depositional growth/modification. Some ages may coincide with documented...[Show more]

CollectionsANU Research Publications
Date published: 2007
Type: Journal article
Source: Geochimica et Cosmochimica Acta
DOI: 10.1016/j.gca.2007.06.003


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