Natural thermoluminescence profiles in lunar cores and implications for meteorites

Details Natural thermoluminescence profiles in lunar cores and implications for meteorites Natural thermoluminescence profiles in lunar cores and implications for meteorites

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24...95b&link_type=abstract

In Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F p 95-96 (SEE N94-12015 01-91)

Computer Science

Cosmic Rays, Irradiation, Lunar Rocks, Meteorites, Meteoritic Composition, Thermoluminescence, Core Sampling, Depth, Feldspars, Ionization, Minerals, Shielding

Scientific paper

Meteorites and lunar samples have been irradiated by high energy cosmic rays, typically for millions of years. In addition to producing isotopic changes, the irradiation creates ionization which may be recorded in the form of stored thermoluminescence (TL) in certain minerals, the most important of which is feldspar. One aspect of interpreting the TL of these samples is the effect of 'shielding' or depth control, which is particularly important for meteorites, since they have lost an unknown amount of mass during atmospheric entry. Here we report theoretical calculations which we compare with samples from lunar cores for which we have excellent stratigraphic control. We then discuss the implications for these results for the TL of meteorites, which have a different irradiation geometry. We find that, in general, calculated profiles are similar to those observed in lunar samples and meteorites. Additional effects, such as orbital (thermal) history and terrestrial age must also be considered in the case of meteorites.

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