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Northwest Africa 11428
Basic information Name: Northwest Africa 11428
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11428
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 783 g
Meteoritical Bulletin:  MB 106  (2018)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 340 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 13 Oct 2017
Writeup from MB 106:

Northwest Africa 11428 (NWA 11428)

(Northwest Africa)

Purchased: 2017 Aug

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Bob Falls in July 2017 from dealer in Zagora, Morocco.

Physical characteristics: The stones lack fusion crust but are thinly coated by reddish-brown weathering products. The fresh interiors exhibit white to beige, angular clasts in a medium gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral clasts of anorthite, exsolved pigeonite, olivine, ilmenite, Ti-chromite, troilite and kamacite in a finer matrix containing sporadic small vesicles.

Geochemistry: Olivine (Fa18.8-56.2, FeO/MnO = 87-96, N = 3), pigeonite (Fs37.8Wo7.6, FeO/MnO = 54), augite (Fs7.5Wo44.2, FeO/MnO = 29), augite host (Fs24.2Wo40.7, FeO/MnO = 66), low-Ca pyroxene exsolution lamella (Fs51.0Wo5.0, FeO/MnO = 65), plagioclase (An97.1-97.2Or0.2, N = 2).

Classification: Lunar (feldspathic breccia).

Specimens: 20.71 g including one polished endcut at UWB; remainder with Mr. B. Falls.

Data from:
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2017 Aug
Mass (g):783.39
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):18.8-56.2
Ferrosilite (mol%):37.8; 7.5
Wollastonite (mol%):7.6; 44.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.71
Type spec location:UWB
Main mass:R. Falls
Comments:Work name BF17-18; submitted by A. Irving
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

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