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Northwest Africa 10973
Basic information Name: Northwest Africa 10973
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10973
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 25 g
Meteoritical Bulletin:  MB 105  (2016)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 312 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 17 Dec 2016
Writeup from MB 105:

Northwest Africa 10973 (NWA 10973)

(Northwest Africa)

Purchased: 2016 Sep

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by John Higgins in September 2016 from a dealer in Nouakchott, Mauritania.

Physical characteristics: A single dark stone (25 g) lacking fusion crust. The fresh interior exhibits small white clasts within a dominant, dark-gray matrix containing sparse vesicles.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of small angular mineral clasts of anorthite, bytownite, pigeonite, olivine, orthopyroxene, Mg-merrillite, ilmenite and kamacite in a finer matrix containing sparse vesicles.

Geochemistry: Olivine (Fa40.1-47.0, FeO/MnO = 84-88, N = 3), orthopyroxene (Fs24.2-36.7Wo4.9-4.1, FeO/MnO = 52-56, N = 2), pigeonite (Fs24.8Wo14.7, FeO/MnO = 46; Fs43.4Wo17.6, FeO/MnO = 54), plagioclase (An90.3Or0.4; An81.5Or1.4; N = 2).

Classification: Lunar (feldspathic regolith breccia).

Specimens: 5.01 g including one polished slice at UWB; remainder with Mr. J. Higgins.

Data from:
  Table 0
  Line 0:
Place of purchase:Nouakchott, Mauritania
Date:P 2016 Sep
Mass (g):25
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):40.1-47.0
Ferrosilite (mol%):24.2-36.7; 24.8; 43.4
Wollastonite (mol%):4.9-4.1; 14.7; 17.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):5.01
Type spec location:UWB
Main mass:J. Higgins
Comments:JH16-9; 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)
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 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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