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Northwest Africa 10661
Basic information Name: Northwest Africa 10661
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10661
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 50 kg
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 259 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 1 Mar 2017
Writeup from MB 106:

Northwest Africa 10661 (NWA 10661)

(Northwest Africa)

Purchased: 2016 Feb

Classification: HED achondrite (Eucrite, monomict)

History: Purchased in Temara, Morocco by Adam Aaronson in February 2016.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of gabbroic eucrite clasts and related crystalline debris. Minerals are exsolved pigeonite, calcic plagioclase (with undulose extinction), silica polymorph, Ti-chromite, ilmenite, rare baddeleyite, and secondary calcite and barite.

Geochemistry: Orthopyroxene host (Fs59.9-65.3Wo3.8-2.7, FeO/MnO = 27-30, N = 3), clinopyroxene exsolution lamellae (Fs29.7-32.1Wo42.6-41.7, FeO/MnO = 28-30, N = 3), plagioclase (An90.3-91.1Or0.6-0.4, N = 2).

Classification: Eucrite (gabbroic breccia, shocked).

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

Data from:
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2016 Feb
Mass (g):50000
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):59.9-65.3; 29.7-32.1
Wollastonite (mol%):3.8-1.7; 42.6-41.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.3
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1891; 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, 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 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 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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