Dating terrestrial impact structures

by  |  31-Jul-2019 03:14

Our results show that (U-Th)/He ages of zircon from the brecciated, and presumably shocked target, can accurately date an impact event and provides another tool to determine impact ages when no melt sheet exists, an alternative to problematic interpretations of commonly used apparent Ar plateau ages.

No evidence of epitaxial overgrowth rims and/or reset zircon was observed, suggesting that zircons within shocked impactites have remarkably slow Pb diffusion and possibly explaining the relatively few reset grains reported in terrestrial impactites.

We use cookies to offer you a better experience, personalize content, tailor advertising, provide social media features, and better understand the use of our services.

To learn more or modify/prevent the use of cookies, see our Cookie Policy and Privacy Policy.

A dating campaign is urgently needed if we are to fully understand the role of impacts in Earth history.

Community Discussion