| Northwest Africa 14577 | |||||||||||||||
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| Basic information | Name: Northwest Africa 14577 This is an OFFICIAL meteorite name. Abbreviation: NWA 14577 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass: 1008 g | ||||||||||||||
| Classification history: |
This is 1 of 19 approved meteorites classified as Lunar (frag. breccia). | ||||||||||||||
| Comments: | Approved 29 Jan 2022 | ||||||||||||||
| Writeup | Writeup from MB 111: Northwest Africa 14577 (NWA 14577) (Northwest Africa) Purchased: 2021 Classification: Lunar meteorite (frag. breccia) History: Purchased from a meteorite dealer in Mauritania in 2021. Physical characteristics: Two identical appearing pieces (768 and 240 g) found together. Saw cut slice surface shows numerous white, light gray and dark gray clasts set in a very dark gray to black host groundmass. Petrography: (A. Ross and C. Agee, UNM) Electron microprobe analysis and reflected light microscopy indicate a lunar polymict breccia. There is a very large range of olivine and pyroxene compositions present. Major phases are plagioclase, pyroxene, and olivine, with pyroxene being more abundant than olivine; minor phases, ilmenite, zircon, silica, and Fe-metal (low Ni) were detected. Geochemistry: (A. Ross, UNM) Plagioclase An93.2±3.2Ab6.5±3.0, n=4; olivine Fa49.9±29.8, range Fa9.2-97.4, Fe/Mn=94±13, n=9; pigeonite Fs51.3±22.4Wo17.0±4.4, Fe/Mn=67±9, n=7; sub-calcic augite Fs28.6±8.6Wo33.1±2.5, Fe/Mn=57±8, n=2. Classification: Lunar fragmental breccia Specimens: 21 g on deposit at UNM, Mark Lyon holds the main mass. | ||||||||||||||
| Data from: MB111 Table 0 Line 0: |
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