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Northwest Africa 8222
Basic information Name: Northwest Africa 8222
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8222
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 209 g
Meteoritical Bulletin:  MB 103  (2014)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 283 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 15 Nov 2014
Writeup from MB 103:

Northwest Africa 8222 (NWA 8222)

(Northwest Africa)

Purchased: 2013 Dec

Classification: Lunar meteorite (feldspathic breccia)

History: The stone was purportedly found near Bir Anzarane, and was purchased in Temara, Morocco, by Adam Aaronson in December 2013.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of separated, angular mineral clasts in a finer-grained, vesicular matrix. Minerals are olivine, anorthite, exsolved pigeonite, augite, chromite, ilmenite, troilite and minor pentlandite.

Geochemistry: Olivine (Fa42.5; Fa80.6; FeO/MnO = 106-134), augite (Fs18.4Wo40.6; FeO/MnO = 54), pigeonite consists of host orthopyroxene (Fs50.1-50.9Wo2.5-5.1; FeO/MnO = 58-64) with exsolution lamellae of augite (Fs38.6Wo41.2; FeO/MnO = 67). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances (in wt.%) FeO 3.7, Na2O 0.37; (in ppm) Sc 7.0, Ni 90, La 1.4, Sm 0.62, Eu 0.82, Yb 0.54, Lu 0.076, Hf 0.43, Th 0.20.

Classification: Lunar (feldspathic fragmental breccia).

Specimens: A 20.1 g specimen with one polished surface is at UWB. The main mass is held by Aaronson.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Bir Anzarane
Place of purchase:Temara
Date:P 2013 Dec
Mass (g):208.6
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):42.5; 80.6
Ferrosilite (mol%):18.4
Wollastonite (mol%):40.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1633; 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, 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)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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