Update on terrestrial ages of Antarctic meteorites

Details Update on terrestrial ages of Antarctic meteorites Update on terrestrial ages of Antarctic meteorites

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989e%26psl..93..299n&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 93, no. 3-4, July 1989, p. 299-313.

Mathematics

Logic

85

Meteorites, Radioactive Age Determination, Antarctic Regions, Chlorine, Chondrites, Earth Surface, Mass Spectroscopy, Thermoluminescence, Meteorites, Antarctic Meteorites, Terrestrial Age, Chlorine 36, Catalog, Spectrometry, Alh Meteorites, Yamato Meteorites, L Chondrites, Procedure, Ll Chondrites, Laboratory Studies, Samples, Meteorite, Eet Meteorites, Thermoluminescence, Weathering, Maps

Scientific paper

Cosmic-ray produced Cl-36 (half-life = 3.01 x 10 to the 5th years) has been measured in 90 Antarctic meteorites by accelerator mass spectrometry. The terrestrial ages of the meteorites were calculated from the results. After excluding possible paired objects, 138 terrestrial ages from 18 different locations are available from C-14, Kr-81, and Cl-36 measurements for application to Antarctic meteorite and glaciological studies. The terrestrial ages of Allan Hills meteorites vary from 2000 years to 1 million years and are clearly longer than those of Yamato meteorites and other Antarctic meteorites. The oldest Allan Hills meteorites were found close to the eastern edge and in the southeast of the main icefield. Among all Antarctic meteorites measured to date, only L and LL chondrites have terrestrial ages older than 370,000 years.

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