Petrology and chemistry of hyperferroan anorthosites and other clasts from lunar meteorite ALHA81005

Details Petrology and chemistry of hyperferroan anorthosites and other clasts from lunar meteorite ALHA81005 Petrology and chemistry of hyperferroan anorthosites and other clasts from lunar meteorite ALHA81005

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984lpsc...15...87g&link_type=abstract

(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 15th, Houston,

Physics

6

Anorthosite, Chemical Composition, Lunar Composition, Meteoritic Composition, Petrology, Regolith, Abundance, Impact Melts, Lithology, Lunar Rocks, Lunar Surface, Phosphorus, Potassium, Rare Earth Elements, Moon, Samples, Lunar, Petrology, Chemistry, Ferroan Materials, Clasts, Anorthosites, Antarctic Meteorites, Allan Hills Meteorites, Alha81005, Description, Composition, Comparisons, Siderophiles, Concentration, Rare Earth Elements, Fractionation, Iron, Enrichment, Abundance

Scientific paper

The results of petrographic and chemical studies of 11 previously undescribed clasts from the lunar meteorite Allan Hills A81005 are reported. The majority of lithic clasts in this regolith breccia are granular to cataclastic polymict breccias that are mixtures of ferroan anorthosites and troctolitic Mg-suite plutonic rocks with mg' greater than 84, An 97, and REE abundances consistent with those of known Mg-suite rocks. Clasts of appropriate Mg-suite end members have not been found in 81005, although magnesian olivine fragments are present. Impact-melt clasts similar in composition to bulk 81005 also occur. AH81005 is low in KREEP.

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