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Northwest Africa 10495
Basic information Name: Northwest Africa 10495
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10495
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 15.6 kg
Meteoritical Bulletin:  MB 105  (2016)  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 3 Feb 2016
Writeup from MB 105:

Northwest Africa 10495 (NWA 10495)


Find: 2015

Classification: Lunar meteorite (feldspathic breccia)

History: A group of similar stones were found together at an undisclosed location in southern Morocco during 2015.

Physical characteristics: Several grayish brown stones (total weight 15.6 kg) lacking fusion crust, but with a polished external appearance. All exhibit the same overall fine grained texture, with some visible larger whitish clasts within a dark gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively fine grained fragmental breccia composed of mineral clasts of anorthite, pigeonite, olivine, augite, Ti-chromite and troilite set in a matrix containing minor secondary barite.

Geochemistry: Olivine (Fa34.8-42.3, FeO/MnO = 86-95, N = 4), pigeonite (Fs29.8-32.4Wo8.8-12.9, FeO/MnO = 47-52, N = 3), augite (Fs20.6Wo35.4, FeO/MnO = 49), plagioclase (An96.4-97.1Or0.1, N = 2). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances: (in wt.%) FeO 7.0, Na2O 0.30; (in ppm) Sc 17.0, La 1.9, Sm 1.0, Eu 0.67, Yb 1.0, Lu 0.15, Hf 0.6, Th 0.15.

Classification: Lunar (feldspathic breccia).

Specimens: 24.3 g including one stone polished on one side at UWB; the remaining material is held by the anonymous finders.

Data from:
  Table 0
  Line 0:
Mass (g):15600
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):34.8-42.3
Ferrosilite (mol%):29.8-32.4; 20.6
Wollastonite (mol%):8.8-12.9; 35.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):24.3
Type spec location:UWB
Main mass:Anonymous
Comments: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)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 1894 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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