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Northwest Africa 11237
Basic information Name: Northwest Africa 11237
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11237
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 583 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 119 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 11 May 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11237 (NWA 11237)

(Northwest Africa)

Purchased: 2017 Jan

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Adam Aaronson in January 2017 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Physical characteristics: A single stone (583 g) lacking fusion crust. The fresh interior exhibits white to beige clasts in a medium-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral grains of anorthite, olivine, pigeonite, exsolved pigeonite, augite, ilmenite, Ti-chromite and troilite, plus sparse glass fragments, set in a finer-grained matrix containing small vesicles and minor barite.

Geochemistry: Olivine (Fa30.5-36.8, FeO/MnO = 99-106, N = 3), pigeonite (Fs20.8-33.2Wo6.2-8.4, FeO/MnO = 64-69, N = 2), orthopyroxene host (Fs52.7Wo1.6, FeO/MnO = 71), augite exsolution lamella (Fs 21.3Wo43.0, FeO/MnO = 66), augite (Fs19.5Wo42.6, FeO/MnO = 67), anorthite (An96.5-97.6Or0.2-0.3, N = 2).

Classification: Lunar (feldspathic breccia).

Specimens: 20.3 g including one polished endcut at UWB; remainder with Aaronson.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2017 Jan
Mass (g):583
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):30.5-36.8
Ferrosilite (mol%):20.8-33.2; 19.5
Wollastonite (mol%):6.2-8.4; 42.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.3
Type spec location:UWB
Main mass:A. Aaronson
Comments:Work name M1998; submitted by A. Irving
Institutions
   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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 106, in preparation (2017)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 5792 approved meteorites from (Northwest Africa) (plus 2067 unapproved names)

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