Lunar Meteorite

Northwest Africa 11243, [unnamed 111], & [unnamed 131]
(presumed paired stones)

northwestern Africa


Northwest Africa 11243
(photo credit: Ken Regelman)


unnamed 131
(photo credit: ?)


Lab sample of Northwest Africa 11243
(photo credit: Randy Korotev)


Lab sample of unnamed 111
(photo credit: Randy Korotev)


Lab sample of unnamed 131
(photo credit: Randy Korotev)


from The Meteoritical Bulletin, No. 106

Northwest Africa 11243

Northwestern Africa
Purchased: December 2017
Mass: 80 g

Lunar meteorite

History: Purchased by Ken Regelman in December 2016 from a Moroccan dealer.

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


More Information

Meteoritical Bulletin Database

NWA 11243






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Prepared by: Randy L. Korotev

Department of Earth and Planetary Sciences
Washington University in St. Louis

Please don’t contact me about the meteorite you think that
you’ve found until you read this and this.



Last revised: 9 February 2018