The Irradiation and Recent Thermal History of QUE 94281 and Other Lunar Meteorites: Evidence for Short Transit Times

Details The Irradiation and Recent Thermal History of QUE 94281 and Other Lunar Meteorites: Evidence for Short Transit Times The Irradiation and Recent Thermal History of QUE 94281 and Other Lunar Meteorites: Evidence for Short Transit Times

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..101b&link_type=abstract

Lunar and Planetary Science, volume 27, page 101

Computer Science

Meteorites: Basaltic, Meteorites: Lunar, Thermoluminescence, Transit Times

Scientific paper

The recent history of lunar meteorites can be divided into three stages, including time spent on or near the lunar surface, ejection into space and transit to Earth, and time spent on Earth. Most lunar meteorites have short terrestrial ages and cosmic ray exposure (CRE) ages compared to most basaltic meteorites. It should, however, be noted that these "ages" carry large uncertainties. The lunar meteorites have significantly lower natural thermoluminescence (TL) levels than basalticmeteorites. Cosmogenic radionuclide abundances suggest this is not the result of lunar meteorites having large terrestrial ages, and we and no differences in short-term ("anomalous fading") characteristics between lunar meteorites and basaltic meteorites. We therefore interpret our TL data in terms of short cosmic ray exposure after ejection from the Moon. EET 87521, MAC 88104/5, QUE 94281, and Y 793169 have apparent space CRE durations of <10,000 years. ALH A81005, Asuka 881757,and Y 82192 have apparent CRE exposure durations in excess of 10,000 years, but these data may represent pre-ejection irradiation.

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