Towards a Self-Consistent Model of Lunar and Martian Meteorite Delivery

Mathematics – Logic

Scientific paper

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Dynamics, Meteorites: Lunar, Meteorites: Martian, Meteorites: Snc

Scientific paper

The lunar and martian meteorites present several puzzles: (1) the equal numbers of each group, (2) the much larger average mass of the martian meteorites, (3) the inferred shallow pre-launch depths of the lunar meteorites vs. the deep ones of the martian meteorites, (4) the prevalence of geologically young rocks amongst the SNCs (even though such terrain is relatively rare on Mars), and (5) the 4-pi age spectrum of the martian objects terminates at about 15 Myr. We have undertaken detailed numerical studies of the orbital history of meteoroids liberated from these bodies. By comparing these results with the age spectrum obtained from cosmic ray exposure studies of the meteorites, we develop a self-consistent model that can explain the above features, although not uniquely since surface properties of the two targets appear to play a major role.

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