Thermal events documented in Hadean zircons by ion microprobe depth profiles
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]
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|Source:||Geochimica et Cosmochimica Acta|
|01_Trail_Thermal_events_documented_in_2007.pdf||1.72 MB||Adobe PDF||Request a copy|
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