Geochemical comparison of impact glasses from lunar meteorites ALHA81005 and MAC88105 and Apollo 16 regolith 64001

Details Geochemical comparison of impact glasses from lunar meteorites ALHA81005 and MAC88105 and Apollo 16 regolith 64001 Geochemical comparison of impact glasses from lunar meteorites ALHA81005 and MAC88105 and Apollo 16 regolith 64001

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55.3019d&link_type=abstract

(The MacAlpine Hills Lunar Meteorite Consortium - Lunar and Planetary Science Conference, 21st, Special Session, Houston, TX, Ma

Computer Science

19

Breccia, Glass, Impact Melts, Lunar Crust, Meteoritic Composition, Regolith, Apollo 16 Flight, Lunar Composition, Magnesium Compounds, Phase Diagrams

Scientific paper

Parameterizations have been developed for impact glass compositions which makes its possible to acquire geochemical information about pre-impact target materials. The impact glass populations among unrelated highland regoliths including Apollo 16 regolith 64001 and the lunar meteorites ALHA81005 and MAC88105 have been compared. It is concluded that the Apollo 16 impact glasses are compositionally more diverse than those in the lunar meteorites. This diversity reflects the complex geology of the Apollo 16 region, in which extensive exposures of mare basalts occur within 300 km. Apollo 16 regolith 64001 contains a distinctive subset of impact glasses with major element compositions similar to lunar highland meteorite. These impact glasses (less than 100 micrograms) indicate that the lunar highlands are geochemically more diverse than the compositional range currently represented by large (more than 1 gram) samples. Lunar impact glasses provide geochemical constraints on the full range of regolith compositions that occur on the moon.

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