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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 Meffre
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.

History

Publication title

Meteoritics and Planetary Science

Volume

37

Issue

11

Pagination

1555-1562

ISSN

1086-9379

Department/School

School of Natural Sciences

Publisher

Meteoritical Society

Place of publication

Arkansas, USA

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the earth sciences

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