Mathematics – Logic
Scientific paper
Aug 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007gecoa..71.4044t&link_type=abstract
Geochimica et Cosmochimica Acta, Volume 71, Issue 16, p. 4044-4065.
Mathematics
Logic
13
Scientific paper
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 pre-deposition metamorphic events for the NGC and igneous emplacement at ca. 3700 Ma. Separate events that do not correlate in time with known geologic episodes prior to the preserved rock record are also present on pre-4000 Ma zircons. We find evidence for a ˜3.9 Ga event, which is coterminous within age uncertainty with one or several large basin-forming impacts (e.g. Nectaris) on the Moon attributed to the late heavy bombardment of the inner solar system.
Harrison Mark T.
Mojzsis Stephen J.
Trail Dustin
No associations
LandOfFree
Thermal events documented in Hadean zircons by ion microprobe depth profiles does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Thermal events documented in Hadean zircons by ion microprobe depth profiles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermal events documented in Hadean zircons by ion microprobe depth profiles will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-973560