Other
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..959n&link_type=abstract
Lunar and Planetary Science, volume 27, page 959
Other
4
Age: Exposure, Age: Terrestrial, Meteorites: Antarctic, Meteorites: Lunar, Nuclides: Cosmogenic
Scientific paper
Most lunar meteorites have complex cosmic ray exposure histories having been exposed both at some depth on the moon (2 pi irradiation) before their ejection and as small bodies in space (4 pi irradiation) during transport from the moon to the earth. Finally, many lunar meteorites found in Antarctica have long terrestrial exposure ages, as is the case for many other meteorites found in Antarctica. A unique determination, in the best of cases, of the duration of each of these distinct epochs requires the measurement of four or more cosmogenic nuclides. We report here cosmogenic 10Be (half-life = 1.5 My), 26AI (0.705 My), and 36CI (0.301 My) results for the new lunar meteorites Queen Alexandra Range 94281 (QUE94281) and Queen Alexandra Range 94269 (QUE94269). From these radionuclide measurements alone we cannot completely unravel the complex history of these objects however we can set meaningful limits on their irradiation histories.
Caffee Marc W.
Nishiizumi Kuni
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