LREE variability in CM matrices: Another look at meteorite compaction ages

Details LREE variability in CM matrices: Another look at meteorite compaction ages LREE variability in CM matrices: Another look at meteorite compaction ages

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24.1537w&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1537-1538 (SEE N94-20636 05-91

Computer Science

Irradiation, Meteorite Collisions, Meteorites, Meteoritic Composition, Particle Tracks, Radioactive Age Determination, Rare Earth Elements, Chronometers, Cosmic Rays, Fission Products, Geochronology, Geomorphology, Neon Isotopes, Plutonium Isotopes, Regolith

Scientific paper

Recent Neon-21 analyses indicate that individual grains in some CM meteorites show the effects of enhanced exposures to energetic particles beyond that which can be attributed to conventional cosmic ray exposure. The exposures clearly occurred prior to the final compaction of the CM meteorites. These exposures were of such a magnitude that they require that we either have to revise our understanding of regolith dynamics and the time scales involved in the regolith activity of meteorite parent bodies, or must invoke an exposure of the irradiated grains to an enhanced energetic particle environment, an environment which would most likely be produced by an early active sun. Constraints on the compaction ages of the meteorites which exhibit the large precompaction exposures could play a critical role in resolving this issue.

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