Laser-fusion 40Ar/39Ar Ages of Darwin Impact Glass

Details Laser-fusion 40Ar/39Ar Ages of Darwin Impact Glass Laser-fusion 40Ar/39Ar Ages of Darwin Impact Glass

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002m%26ps...37.1555l&link_type=abstract

Meteoritics & Planetary Science, vol. 37, no. 11, pp. 1555-1562 (2002)

Computer Science

7

Scientific paper

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 40Ar/39Ar 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.

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