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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 30 approved meteorites classified as Lunar (frag. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
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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Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) |
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Catalogs: |
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References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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