Exposure and terrestrial ages of four Allan Hills Antarctic meteorites

Details Exposure and terrestrial ages of four Allan Hills Antarctic meteorites Exposure and terrestrial ages of four Allan Hills Antarctic meteorites

Dec 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978metic..13..519k&link_type=abstract

(Meteoritical Society, Annual Meeting, 41st, Sudbury, Ontario, Canada, Aug. 14-17, 1978.) Meteoritics, vol. 13, Dec. 31, 1978, p

Computer Science

Chronology, Cosmic Rays, Meteoritic Composition, Rare Gases, Aluminum 26, Argon Isotopes, Carbon 14, Helium Isotopes, Manganese Isotopes, Neon Isotopes

Scientific paper

Terrestrial ages of meteorites are based on the amount of cosmic-ray-produced radioactivity in the sample and the number of observed falls that have similar cosmic-ray exposure histories. The cosmic-ray exposures are obtained from the stable noble gas isotopes. Noble gas isotopes are measured by high-sensitivity mass spectrometry. In the present study, the noble gas contents were measured in four Allan Hill meteorites (No. 5, No. 6, No. 7, and No. 8), whose C-14, Al-26, and Mn-53 radioactivities are known. These meteorites are of particular interest because they belong to a large assemblage of distinct meteorites that lie exposed on a small (110 sq km) area of ice near the Allan Hills.

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