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Northwest Africa 12270 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12270 This is an OFFICIAL meteorite name. Abbreviation: NWA 12270 Observed fall: No Year found: 2018 Country: Mauritania Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 276 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 2 Dec 2018 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 107:
Northwest Africa 12270 (NWA 12270) Mauritania Purchased: 2018 Classification: Lunar meteorite (feldspathic breccia) History: Purchased by Terry Boudreaux from a meteorite dealer in Mauritania. Physical characteristics: Six identically appearing pieces, no fusion crust, saw cut reveals a fragmental breccia with numerous white feldspathic clasts set in a dark gray ground mass. Petrography: (C. Agee, UNM) This meteorite consists of primarily of fragmental pyroxene, olivine, feldspathic clasts and shock melt. Ubiquitous Ti-rich chromite and ilmenite present, rare Fe-Ni metal detected. Geochemistry: (C. Agee, UNM) olivine Fa42.7±7.3, Fe/Mn=94±9, n=14; pigeonite Fs37.0±8.0Wo17.9±6.9, Fe/Mn=56±5, n=13; plagioclase An96.6±0.4, n=6; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=44.8±1.3, TiO2=0.31±0.08, Al2O3=26.0±3.9, Cr2O3=0.15±0.09, MgO=5.0±2.2, FeO=5.9±1.7, MnO=0.08±0.03, CaO=16.1±1.8, NiO=0.02±0.01, Na2O=0.44±0.07, K2O=0.08±0.01 (all wt%), n=7. Classification: Lunar feldspathic breccia Specimens: 29.2 g including a probe mount on deposit at UNM, Terry Boudreaux holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB107 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) Boudreaux: Terry Boudreaux, Illinois, United States (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography:![]() |
Statistics: This is 1 of 166 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters) |