Lunar origin: Role of giant impacts

Details Lunar origin: Role of giant impacts Lunar origin: Role of giant impacts

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pggp.rept..125h&link_type=abstract

In NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984 p 125-126 (SEE N85-23474 13-91)

Other

Deposition, Impact, Lunar Evolution, Protoplanets, Ejecta, Fission, Flux (Rate), Planetary Mantles, Planetary Mass

Scientific paper

The explanation that lunar origin involved giant impacts remains attractive. Large planetesimals are consistent with current accretion models, and may have been widely scattered in the early solar systems; their existence is a reasonably, assumption in Moon origin models. Isotopic data require the Moon's formation primarily from local material resembling Earth's upper mantle, not material from elsewhere in the solar system. Giant impacts are stochastic, class predictable events that would provide the required type of ejected Earth mantle material without requiring large moons to form near other planets (a problem with less stochastic processes). Such material may have mixed with incoming meteorites during lunar formation, affecting lunar chemistry.

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