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Northwest Africa 14140
Basic information Name: Northwest Africa 14140
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14140
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1488 g
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 280 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 31 Aug 2021
Writeup from MB 110:

Northwest Africa 14140 (NWA 14140)

(Northwest Africa)

Purchased: 2021 Jan

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Dr. David Gregory in January 2021 from a dealer in Zagora, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed predominantly of mineral clasts of anorthite and olivine plus minor pigeonite and rare low-Ca pyroxene in a fine grained matrix containing troilite and minor secondary barite. Some lithic clasts composed almost entirely of anorthite are present.

Geochemistry: Olivine (Fa21.9-41.1, FeO/MnO = 85-107, N = 6), low-Ca pyroxene (Fs32.1Wo2.7, FeO/MnO = 52), pigeonite (Fs18.3-20.2Wo18.3-11.9, FeO/MnO = 45-51, N = 2), anorthite (An96.6-97.2Or0.1-0.0, N = 3).

Classification: Lunar (feldspathic breccia).

Specimens: 21.9 g in the form of a polished endcut at UWB; remainder with DGregory.

Data from:
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2021 Jan
Mass (g):1488
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):21.9-41.1
Ferrosilite (mol%):32.1; 18.3-20.2
Wollastonite (mol%):2.7; 18.3-11.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.9
Type spec location:UWB
Main mass:DGregory
Comments:Work name RC144.4; 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)
DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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