Northwest Africa 10141 (NWA 10141)

(Northwest Africa)

Purchased: 2015 Jan

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Matt Morgan and Lee Morgan in Morocco in January 2015.

Physical characteristics: Single stone. A saw cut reveals a feldspathic breccia with dark-gray shock melt veins.

Petrography: (C. Agee, UNM) This meteorite is mixture of a fine-grained cataclastic domains, large fragmental plagioclase crystals, and shock melt veins; some of the veins have ~100 μm-size vesicles. Accessory troilite, ilmenite, and chromite were observed.

Geochemistry: (C. Agee and N. Muttik, UNM) olivine Fa_38.8±1.4, Fe/Mn=102±7, n=12; pigeonite Fs_34.9±3.6Wo_7.2±3.5, Fe/Mn=62±4, n=5; augite Fs_25.8±5.3Wo_32.1±0.9, Fe/Mn=55±5, n=5; plagioclase An_96.7±0.4Ab_3.1±0.4Or_0.2±0.0, n=6; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO₂=44.1±0.4, TiO₂=0.18±0.04, Al₂O₃=31.4±1.0, Cr₂O₃=0.06±0.02, MgO=3.3±0.7, FeO=3.4±0.6, MnO=0.04±0.02, CaO=17.4±0.5, NiO=0.02±0.02, Na₂O=0.33±0.03, K₂O=0.05±0.01 (all wt%), Fe/Mn=76±17, Mg#=63±2, MgO+FeO=6.7±1.3 (wt%), n=10.

Classification: Lunar (feldspathic breccia)

Specimens: 8.1 g including a probe mount on deposit at UNM, MtMorgan and Lee Morgan hold the main mass.