Lunar Meteorite: Northwest Africa 10447
from The Meteoritical Bulletin, No. 104
Northwest Africa 10447 (NWA 10447)
Lunar Meteorite (feldspathic breccia)
History: Purportedly found with other similar stones near Al Mahbas, southern Morocco, and purchased by Fabien Kuntz in May 2015 from a dealer in Agadir, Morocco.
Physical characteristics: A single small stone (21.73 g) lacking fusion crust. The interior exhibits white, pale orange and light gray clasts set in a gray matrix (~25 vol.%).
Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed of mineral clasts of anorthite, olivine, pigeonite, augite, subcalcic augite, ferropigeonite, fayalite, silica polymorph, Ti-Al-chromite, ilmenite, troilite and rare baddeleyite in a finer grained matrix.
Geochemistry: Olivine (Fa37.0-39.9, FeO/MnO = 97, N = 2), pigeonite (Fs29.1Wo, FeO/MnO = 55), ferropigeonite (Fs65.9Wo7.3, FeO/MnO = 70), subcalcic augite (Fs20.5Wo25.4; Fs64.7Wo25.2; FeO/MnO = 55-70), augite (Fs31.6Wo37.5, FeO/MnO = 74), fayalite (Fa73.9, FeO/MnO = 106), plagioclase (An91.1-91.4Or0.1-0.4, N = 2).
Bulk composition: (R. Korotev, WUSL): INAA of subsamples gave the following mean abundances (in wt.%) FeO 15.3, Na2O 0.30; (in ppm) Sc 30.2, Ni 140, La 5.0, Sm 2.47, Eu 0.67, Yb 1.9, Lu 0.28, Hf 1.8, Th 0.8.
Classification: Lunar (feldspathic breccia).
Specimens: 4.44 g including a polished endcut at PSF; remainder with Kuntz.
Northwest Africa 10447 is one of the most mafic (iron rich, 15% FeO) of the brecciated lunar meteorites. I am unaware of any pairs; it is most similar to the NWA 7661 clan.
Meteoritical Bulletin Database
Korotev R. L. and Irving A. J. (2016) Not quite keeping up with the lunar meteorites – 2016. 47th Lunar and Planetary Science Conference, abstract no. 1358.
Korotev R. L. and Irving A. J. (2021) Lunar meteorites from northern Africa. Meteoritics & Planetary Science, 206–240.