Lunar Meteorite: Northwest Africa 14050

from The Meteoritical Bulletin, No. 110

Northwest Africa 14050 (NWA 14050)

(northwestern Africa)
Purchased: 2020 December
Mass: 69.6 g (1 piece)

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Tom Thiegs in December 2020 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of relatively small mineral clasts of anorthite, olivine, low-Ca pyroxene, subcalcic augite, augite, subcalcic ferroaugite plus rare microgabbroic lithic clasts set in a sparse fine-grained matrix containing accessory ilmenite, zircon, Ti-chromite, troilite, baddeleyite and minor secondary barite. Phases observed in BSE, from dark to bright: Ca pyroxene (Fe-rich), ilmenite, zirconolite (Y, REE present), baddeleyite, monazite (Ce>La)

Geochemistry: Olivine (Fa_24.6-55.3, FeO/MnO = 89-104, N = 5), low-Ca pyroxene (Fs_31.7-50.5Wo_2.3-4.0, FeO/MnO = 55-61, N = 3), subcalcic augite (Fs_21.7Wo_31.3, FeO/MnO = 48), subcalcic ferroaugite (Fs_61.8Wo_31.2, FeO/MnO = 74), augite (Fs_14.3Wo_42.9, FeO/MnO = 56), anorthite (An_96.5-98.6Or_0.1-0.0, N = 3).

Classification: Lunar (feldspathic breccia).

Specimens: 14.58 g including one polished thin section at UWB; remainder with Mr. T. Thiegs.

Randy Says…

I have not studied NWA 14050.

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