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Northwest Africa 773: Lunar origin and iron-enrichment trend

Fagan, T.J.; Taylor, G Jeffrey; Keil, Frerich; Hicks, T.L.; Killgore, M; Bunch, T.E.; Wittke, J.H.; Mittlefehldt, David W; Clayton, R.N.; Mayeda, T K; Eugster, O.; Lorenzetti, S; Norman, Marc


The meteorite Northwest Africa 773 (NWA 773) is a lunar sample with implications for the evolution of mafic magmas on the moon. A combination of key parameters including whole-rock oxygen isotopic composition, Fe/Mn ratios in mafic silicates, noble gas concentrations, a KREEP-like rare earth element pattern, and the presence of regolith agglutinate fragments indicate a lunar origin for NWA 773. Partial maskelynitization of feldspar and occasional twinning of pyroxene are attributed to shock...[Show more]

CollectionsANU Research Publications
Date published: 2003
Type: Journal article
Source: Meteoritics and Planetary Science


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