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Northwest Africa 12422
Basic information Name: Northwest Africa 12422
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12422
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 42.8 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 166 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 9 Feb 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12422 (NWA 12422)

(Northwest Africa)

Find: 2018 Oct

Classification: Lunar meteorite (feldspathic breccia)

History: Found in October 2018 in the Assa-Zag region of Morocco and purchased by Craig Zlimen in November 2018 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Very fine grained assemblage of mineral clasts (including anorthite, orthopyroxene, augite, rare zoned olivine) in a partly vitreous ("swirly") and sparsely vesicular matrix containing kamacite, chromite and troilite.

Geochemistry: Anorthite (An96.7-97.4Or0.1, N = 2), orthopyroxene (Fs24.6-26.6Wo3.9-4.1, FeO/MnO = 54-58, N = 2), pigeonite (Fs36.6Wo9.7, FeO/MnO = 71), augite (Fs15.3Wo40.1, FeO/MnO = 38), olivine (core Fa 15.1, FeO/MnO = 96; rim Fa24.7, FeO/MnO = 104).

Classification: Lunar (feldspathic regolith melt breccia).

Specimens: 9.5 g in the form of a polished endcut at UWB; remainder with Mr. C. Zlimen.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Zagora
Date:2018 Oct
Mass (g):42.8
Pieces:2
Class:Lunar (feldsp. breccia)
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):15.1-24.7
Ferrosilite (mol%):24.6-26.6; 36.6; 15.3
Wollastonite (mol%):3.9-4.1; 9.7; 40.1
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):9.5
Type spec location:UWB
Main mass:C. Zlimen
Comments:Work name ZLI06; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6624 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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