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Northwest Africa 12952
Basic information Name: Northwest Africa 12952
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12952
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 808 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 291 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 7 Nov 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12952 (NWA 12952)

(Northwest Africa)

Find: 2011

Classification: Lunar meteorite (feldspathic breccia)

History: Found in 2011 at an undisclosed desert location and purchased in 2018 by Luc Labenne from a dealer in Erfoud, Morocco. Subsequently the stone was acquired by Hermès, Paris.

Physical characteristics: Very fresh specimen with a glassy exterior coating. The interior exhibits numerous small clasts in a black matrix.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of a variety of mineral clasts and rare fayalite-hedenbergite-silica symplectite clasts in a much finer grained crystalline matrix. Minerals are anorthitic plagioclase, subcalcic augite (zoned to ferropigeonite), olivine, chromite, augite with pigeonite exsolution lamellae, fayalite, hedenbergite, silica polymorph, ilmenite, troilite, zircon and baddeleyite.

Geochemistry: Olivine (Fa34.1-49.9, FeO/MnO = 85-103, N = 7), subcalcic augite (Fs24.0-39.8Wo28.9-28.1, FeO/MnO = 48-65, N = 2), ferropigeonite (Fs54.7-67.2Wo20.9-23.0, FeO/MnO = 70-87, N = 2), pigeonite (Fs31.6Wo13.2, FeO/MnO = 57), augite (Fs16.6Wo36.3, FeO/MnO = 40), fayalite (Fa83.8, FeO/MnO = 105), plagioclase (An89.2-90.8Or0.2-0.3, N = 2).

Classification: Lunar (feldspathic breccia).

Specimens: 20.2 g including a polished endcut at UWB; remainder with Hermès, 24 rue du Faubourg Saint-Honoré, 75 008 Paris.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:2011
Mass (g):808
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):34.1-49.9; 83.8
Ferrosilite (mol%):31.6; 16.6-39.8; 54.7; 67.2
Wollastonite (mol%):13.2; 36.3-28.1; 20.9; 23.0
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.2
Type spec location:UWB
Main mass:Hermès, Paris
Comments:Work name LAB 030819; 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)
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)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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