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Northwest Africa 11185
Basic information Name: Northwest Africa 11185
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11185
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 94 g
Meteoritical Bulletin:  MB 106  (2018)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 329 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 10 Apr 2017
Writeup from MB 106:

Northwest Africa 11185 (NWA 11185)

(Northwest Africa)

Purchased: 2016 Jun

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Ben Hoefnagels in June 2016 from a dealer in Taliouine, Morocco.

Physical characteristics: Four stones (total weight 94.02 g) of very similar appearance purchased together from the same dealer exhibit the same types of white clasts in a dark-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral grains of anorthite, olivine, pigeonite, exsolved pigeonite, subcalcic augite, augite, Ti-Al-chromite, ilmenite and fayalite in a finer grained matrix containing low-Ni kamacite, taenite, troilite, baddeleyite and Mg-ilmenite. A quench-textured melt rock clast was also observed.

Geochemistry: Olivine (Fa34.1, FeO/MnO = 107; Fa91.2, FeO/MnO = 82; N = 2), pigeonite (Fs22.4-28.6Wo15.0-8.1, FeO/MnO = 64-68, N = 2), subcalcic augite (Fs20.7Wo30.7, FeO/MnO = 58), augite (Fs50.2Wo37.5, FeO/MnO = 65), plagioclase (An93.5Or0.4; An85.5Or1.2; N = 2). Bulk composition (R. Korotev, WUSL): INAA of subsamples of two stones gave INAA of subsamples gave the following mean abundances (in wt.%) FeO 10.0, Na2O 0.43; (in ppm) Sc 18.9, Ni 300, La 8.3, Sm 3.86, Eu 0.98, Yb 2.64, Lu 0.37, Hf 2.8, Th 1.2.

Classification: Lunar (feldspathic breccia).

Specimens: 19.1 g including a 10.3 g polished endcut from one stone at UWB; remainder with Mr. B. Hoefnagels.

Data from:
  Table 0
  Line 0:
Place of purchase:Taliouine
Date:P 2016 Jun
Mass (g):94.02
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):34.1; 91.2
Ferrosilite (mol%):28.6; 22.4; 20.7; 50.2
Wollastonite (mol%):8.1; 15.0; 30.7; 37.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):19.1
Type spec location:UWB
Main mass:B. Hoefnagels
Comments:BH005; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
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 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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