Lunar Meteorite: Northwest Africa 10973

northwestern Africa

Two slices of Northwest Africa 10973. Photo credits: John Higgins

from The Meteoritical Bulletin, No. 105

Northwest Africa 10973 (NWA 10973)

(Northwestern Africa)
Purchased: 2016 Sep
Mass: 25 g (1 piece)

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by John Higgins in September 2016 from a dealer in Nouakchott, Mauritania.

Physical characteristics: A single dark stone (25 g) lacking fusion crust. The fresh interior exhibits small white clasts within a dominant, dark-gray matrix containing sparse vesicles.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of small angular mineral clasts of anorthite, bytownite, pigeonite, olivine, orthopyroxene, Mg-merrillite, ilmenite and kamacite in a finer matrix containing sparse vesicles.

Geochemistry: Olivine (Fa40.1-47.0, FeO/MnO = 84-88, N = 3), orthopyroxene (Fs24.2-36.7Wo4.9-4.1, FeO/MnO = 52-56, N = 2), pigeonite (Fs24.8Wo14.7, FeO/MnO = 46; Fs43.4Wo17.6, FeO/MnO = 54), plagioclase (An90.3Or0.4; An81.5Or1.4; N = 2).

Classification: Lunar (feldspathic regolith breccia).

Specimens: 5.01 g including one polished slice at UWB; remainder with Mr. J. Higgins.

Randy Says…

NWA 10973 is a feldspathic lunar meteorite that is moderately rich in KREEP elements with a composition like Apollo 16 soil. It is possibly paired with NWA 8010.

More Information

Meteoritical Bulletin Database

NWA 10973

References

Korotev R. L. and Irving A. J. (2017) Still not keeping up with the lunar meteorites – 2017. 48th Lunar and Planetary Science Conference, abstract no. 1498.

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

Lunar Meteorites | List of Lunar meteorites