Lunar Meteorite: Northwest Africa 13185

End cuts of small stones of Northwest Africa 13185. Photo credits: Matthew Stream
A larger piece of NWA 13185. Photo credits: Matthew Stream

from The Meteoritical Bulletin, No. 109

Northwest Africa 13185 (NWA 13185)

northwestern Africa
Purchased: 2019 March
Mass: 300 g (several pieces)

Classification: Lunar Meteorite (feldspathic breccia)

History: Purchased in Agadir, Morocco by Aziz Habibi in March 2019.

Physical characteristics: The dark brown stones exhibit diffuse small clasts in a very fine grained matrix.

Petrography: A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of small mineral clasts plus sparse lithic clasts (including microgabbro and some quench-textured glassy beads) set in a fine grained, partly glassy and microvesicular matrix. Minerals include anorthite, olivine, orthopyroxene, pigeonite, ferropigeonite and augite together with accessory Ti chromite, ilmenite, zircon, kamacite and secondary barite.

Geochemistry: Olivine (Fa28.2-45.8, FeO/MnO = 97-125, N = 5), orthopyroxene (Fs41.0-43.0Wo2.4-2.9, FeO/MnO = 57-66, N = 2), pigeonite (Fs46.5Wo5.4; Fs27.6Wo8.5; Fs28.0-28.7Wo11.0-10.4; Fs44.2Wo16.9; FeO/MnO = 53-61, N = 5), ferropigeonite (Fs60.7Wo18.7, FeO/MnO = 74), augite (Fs22.3Wo40.1, FeO/MnO = 50; Fs46.9Wo38.9, FeO/MnO = 68; N = 2), anorthite (An95.8-97.1Or0.3-0.1, N = 3).9.7, MgO=6.2, FeO=2.3, MnO=0.07, CaO=15.7, Na2O=0.45 (wt%).

Classification: Lunar (feldspathic breccia)

Specimens: 20.3 g including one polished piece at UWB; 100 g with Mr. M. Stream; remainder with A. Habibi.

Randy Says…

I have not studied NWA 13185. 

More Information

Meteoritical Bulletin Database

NWA 13185