Lunar Meteorite: Northwest Africa 11243 & an unnamed pair

northwestern Africa

(presumed paired stones)

Northwest Africa 11243. Photo credit:

unnamed 111: Photo credit: unknown

Lab sample of NWA 11243: Photo credit: Randy Korotev

Lab sample of unnamed 111: Photo credit: Randy Korotev

from The Meteoritical Bulletin, No. 106

Northwest Africa 11243

Northwestern Africa
Purchased: December 2017
Mass: 80 g (1 piece)

Lunar meteorite

History: Purchased by Ken 

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral fragments and sparse olivine noritic lithic clasts in a finer grained matrix. Minerals are anorthite, olivine, orthopyroxene, pigeonite, ferropigeonite, fayalite, silica polymorph, Al-Ti-chromite, kamacite, ilmenite, troilite and calcite.

Geochemistry: Olivine (Fa23.3, FeO/MnO = 101), orthopyroxene (Fs12.9-26.3Wo4.2-2.4, FeO/MnO = 60-74, N = 2), pigeonite (Fs30.1Wo8.7, FeO/MnO = 66), ferropigeonite (Fs61.1Wo24.4, FeO/MnO = 64), fayalite (Fa87.4, FeO/MnO = 80), anorthite (An97.7-98.3Or0.3-0.1, N = 2).

Classification: Lunar (feldspathic breccia).

Specimens: 16.24 g including one polished slice at UWB; remainder with Mr. K. <Regelman.

Randy Says…

These two stones may not be paired, but they are very similar in composition.

More Information

Meteoritical Bulletin Database

NWA 11243

Korotev R. L. and Irving A. J. (2021) Lunar meteorites from northern Africa. Meteoritics & Planetary Science, 206–240. 

Lunar Meteorites | List of Lunar meteorites