Meteorite Picture of the Day: Northwest Africa 13951
from The Meteoritical Bulletin, No. 110
Northwest Africa 13951 (NWA 13951)
Classification: Lunar meteorite (feldspathic breccia)
History: Purchased in January 2021 by Mark Lyon from a dealer in Mauritania.
Physical characteristics: Two identically appearing masses (2.5 and 1.8 kg) found together. Saw cut surface shows numerous clasts with gray and white grains, bounded by abundant darker gray melt veins. No fusion crust is present.
Petrography: (C. Agee, UNM) Electron microprobe analysis and imaging reveal a very fine-grained brecciated mix of plagioclase, pyroxene, olivine and melt. Numerous Fe-Ni metal grains are scattered throughout, some as large as 1 mm.
Geochemistry: (C. Agee, UNM) Plagioclase An96.5±1.7Ab4.0±1.7Or0.4±0.2, n=6; pigeonite Fs31.9±4.0Wo9.7±3.5, Fe/Mn=52±4, n=9; augite Fs14.9Wo38.2, Fe/Mn=49, n=1; subcalcic ferroaugite Fs45.4±2.6Wo29.5±5.2, Fe/Mn=59±1, n=3; olivine Fa34.3±6.3, Fe/Mn=96±9, n=13; metal Fe=93.4±2.0, Ni=6.6±1.7 wt%, n=4.
Classification: Lunar feldspathic breccia
Specimens: 21.5 g on deposit at UNM, Sean Mahoney and Juan Poblador hold the 2.5 kg mass, Paul Hoyt holds 740 g of the 1.8 kg mass.
I have not studied NWA 13951.
Meteoritical Bulletin Database