Lunar Meteorite: Northwest Africa 14540

from The Meteoritical Bulletin, No. 111

Northwest Africa 14540 (NWA 14540)

(Northwestern Africa)
Purchased: 2021 March
Mass: 25.3 g (1 piece)

Lunar meteorite (feldspathic breccia)

Petrography: (J. Gattacceca, CEREGE) Mineral clasts (Ca-pyroxene, olivine, plagioclase) to 200 µm set in a quenched melt rock matrix composed of µm-sized pyroxene in a feldspathic mesostasis. Metal, troilite, ilmenite are present. One mm-sized subophitic clast with 50 µm grain size is present.

Geochemistry: Olivine Fa39.5±1.0, FeO/MnO = 94.0 (n=4). Ca-pyroxene Fs18.1±7.7Wo34.3±10.8, range Fs10.1-32.8, range Wo13.0-43.3, FeO/MnO = 54.0±12.7 (n=8). Plagioclase An95.8Ab3.9Or0.3 (n=6). Chromite Cr# = 0.75.

Classification: Lunar meteorite (Feldspathic breccia).

Specimens: Type specimen (5.66) at CEREGE. Main mass with Kuntz.

Randy Says…

I have not studied Northwest Africa 14540.

More Information

Meteoritical Bulletin Database

NWA 14540