New fission-track age determinations on impact glasses

Details New fission-track age determinations on impact glasses New fission-track age determinations on impact glasses

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996m%26ps...31..234b&link_type=abstract

Meteoritics and Planetary Science, Vol. 31, p. 234-236 (1996)

Physics

12

Scientific paper

Four samples from Libyan Desert glass, one sample from Muong-Nong-type tektite, labelled Guang-Dong, and one sample from Czech Moldavite were analysed using the fission-track dating method. The Moldavite was unaffected by partial thermal track annealing, whereas the ages of Libyan Desert glass and Guang-Dong tektite appear to have been thermally lowered. Fission-track ages of the latter impact glasses were corrected using the plateau method. Apparent ages of Libyan Desert glass (between 26.0±8 Ma and 29.0±1.8 Ma) and Guang-Dong tektite (0.61±0.05 Ma), as well as plateau ages (weighted mean: 28.5±0.8 Ma for Libyan Desert glass and 0.77±0.08 Ma for Guang-Dong) resulted in close agreement with previous determinations published in the late 1970s by Storzer and Wagner (1977). The age of the Moldavite (15.2±0.08 Ma) also resulted in agreement with previous fission track and K-Ar determinations.

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