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New fission‐track age determinations on impact glasses
Author(s) -
Bigazzi Giulio,
Michele Vincenzo
Publication year - 1996
Publication title -
meteoritics and planetary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.09
H-Index - 100
eISSN - 1945-5100
pISSN - 1086-9379
DOI - 10.1111/j.1945-5100.1996.tb02017.x
Subject(s) - fission track dating , plateau (mathematics) , geology , fission , mineralogy , geochemistry , nuclear physics , physics , mathematical analysis , mathematics , neutron , apatite
— 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 ± 1.8 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.