Ar-40/Ar-39 ages of types 3 and 4, L and H chondrites from Antarctica

Details Ar-40/Ar-39 ages of types 3 and 4, L and H chondrites from Antarctica Ar-40/Ar-39 ages of types 3 and 4, L and H chondrites from Antarctica

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988metic..23..373s&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 23, Dec. 1988, p. 373-377.

Physics

3

Abundance, Antarctic Regions, Argon Isotopes, Chondrites, Neutron Irradiation, Outgassing, Petrography, Radioactive Age Determination

Scientific paper

Ar-40/Ar-39 studies of seven low petrographic type L and H chondrites from Antarctica are presented. The hypothesis of McKinley et al. (1981) that the L3 chondrites ALHA77015, -77167, -77249, and -77260 are from a common fall is confirmed. It is shown that the Ar-degassing patterns of the four meteorites are identical. Also, the chondrites have similar K, Ca, Cl, and trapped Ar-39 contents and Ar-40/Ar-39 ages.

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