Computer Science
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..343e&link_type=abstract
Lunar and Planetary Science, volume 27, page 343
Computer Science
4
Exposure Age, Gases: Cosmogenic, Gases: Noble, Meteorites: Lunar, Wind: Solar
Scientific paper
Lunar meteorite QUE94269 (3.2 g), an anorthositic breccia, was recognized to be paired with QUE93069 (21.4 g). We obtained a 0.023 mg interior chip of QUE94269 for the characterization of the solar wind- and cosmic ray-exposure history and comparison with QUE93069. The concentrations of the trapped and cosmic ray produced noble gases and their isotopic ratios are very similar in QUE94269 and QUE93069 (36Artr: 3.45 and 3.66x10-4 cm3STP/g, 21Nec: 36.6 and 40.8x10-8 cm3STP/g). They represent the most mature known lunar meteorites with respect to solar- and cosmic ray-particle irradiations. Lunar meteorite QUE94281 (23.4 g) is a basaltic breccia. It's chemical composition is similar to that of lunar meteorite Y-793274. In fact, the concentrations of trapped 36Ar in these two lunar meteorites are similar but QUE94281 shows a higher loss of He and Ne than Y-793274 and it's lunar regolith residence time (T38 = 370 Ma) appears to have been only half of that of Y-793274.
Eugster Otto
Polnau Ernst
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