Radiation history of Antarctic and non-Antarctic meteorites

Details Radiation history of Antarctic and non-Antarctic meteorites Radiation history of Antarctic and non-Antarctic meteorites

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991avest..25..233a&link_type=abstract

Astronomicheskii Vestnik (ISSN 0320-930X), vol. 25, Mar.-Apr. 1991, p. 233-244. In Russian.

Astronomy and Astrophysics

Astronomy

1

Chondrites, Meteoritic Composition, Radioactive Age Determination, Radioactive Isotopes, Aluminum Isotopes, Antarctic Regions, Manganese Isotopes, Radioactive Decay

Scientific paper

Distributions of the radiation ages of Antarctic and non-Antarctic H chondrites are examined. Distributions of the long-lived cosmogenic radionuclides of Al-26 and Mn-53 in 880 Antarctic and non-Antarctic ordinary chondrites are investigated. The average content of Al-26 in non-Antarctic H chondrites was found to be close to that in non-Antarctic L and LL chondrites. It was discovered that the average content of Al-26 in the Antarctic chondrites is 15 + or - 3 percent higher than that in the Antarctic L and LL chondrites. It is inferred that the fall frequency of L and LL chondrites on the earth was approximately constant but that of H chondrites changed and was maximal about n x 10,000 years ago.

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