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Laser fusion argon-40/argon-39 ages of Darwin impact glass
journal contribution
posted on 2023-05-16, 13:42 authored by Lo, CH, Howard, KT, Chung, SL, Sebastien MeffreSebastien MeffreThree samples of Darwin Glass, an impact glass found in Tasmania, Australia at the edge of the Australasian tektite strewn field were dated using the 40 Ar/ 39 Ar single-grain laser fusion technique, yielding isochron ages of 796-815 ka with an overall weighted mean of 816 ± 7 ka. These data are statistically indistinguishable from those recently reported for the Australasian tektites from Southeast Asia and Australia (761-816 ka; with a mean weighted age of 803 ± 3 ka). However, considering the compositional and textural differences and the disparity from the presumed impact crater area for Australasian tektites, Darwin Glass is more likely to have resulted from a distinct impact during the same period of time.
History
Publication title
Meteoritics and Planetary ScienceVolume
37Issue
11Pagination
1555-1562ISSN
1086-9379Department/School
School of Natural SciencesPublisher
Meteoritical SocietyPlace of publication
Arkansas, USARepository Status
- Restricted