Lunar Meteorite: Northwest Africa 12393

northwestern Africa

from The Meteoritical Bulletin, No. 108

Northwest Africa 12393 (NWA 12393)

(northwestern Africa)
Purchased: 2016
Mass: 1267.1 g (1 piece)

Lunar Meteorite (olivine gabbronorite breccia)

History: Purchased from Ahmad Buraga in Morocco, February 22, 2016.

Physical characteristics: Single stone, lacking fusion crust. Saw cut reveals a breccia of dark-brown and dark-green clasts with a few, scattered, light-colored, feldspathic fragments.

Petrography: (C. Agee, UNM) This meteorite is a chemically equilibrated, fragmental breccia with olivine, augite, low-Ca pyroxene, anorthitic plagioclase, and ubiquitous minor chromite. Following lunar petrologic nomenclature this is an olivine gabbronorite.

Geochemistry: (C. Agee, UNM) Olivine Fa 27.2±2.9, n=12; augite Fs14.0±1.4Wo39.8±1.8, Fe/Mn=50±7, n=4; low-Ca pyroxene Fs22.5±1.9Wo5.9±2.1, Fe/Mn=52±3, n=8; plagioclase An96.3±0.9Ab3.5±0.9Or0.2±0.0, n=7.

Classification: Lunar (olivine gabbronorite)

Specimens: 20.4 g including a probe mount on deposit at UNM, Jay Piatek holds the main mass.

Randy Says…

I have not studied Northwest Africa 12393. I suspect that it is not related to the NWA 773 clan because the olivine is more forsteritic and the plagioclase is more anorthitic.

More Information

Meteoritical Bulletin Database

NWA 12393

Lunar Meteorites | List of Lunar meteorites