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Laser fusion argon-40/argon-39 ages of Darwin impact glass

Citation

Lo, CH and Howard, KT and Chung, SL and Meffre, S, Laser fusion argon-40/argon-39 ages of Darwin impact glass, Meteoritics and Planetary Science, 37, (11) pp. 1555-1562. ISSN 1086-9379 (2002) [Refereed Article]

DOI: doi:10.1111/j.1945-5100.2002.tb00810.x

Abstract

Three 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.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Geochronology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Howard, KT (Mr Kieren Howard)
Author:Meffre, S (Dr Sebastien Meffre)
ID Code:24740
Year Published:2002
Web of Science® Times Cited:13
Deposited By:Earth Sciences
Deposited On:2002-08-01
Last Modified:2011-11-21
Downloads:0

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