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Northwest Africa 11331
Basic information Name: Northwest Africa 11331
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11331
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 318 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 175 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 14 Jul 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11331 (NWA 11331)

(Northwest Africa)

Purchased: 2017 Apr

Classification: Lunar meteorite (feldspathic breccia)

History: Material excavated from a site near Tindouf, Algeria was purchased by Pierre-Marie Pelé in April 2017 from a dealer in Rissani, Morocco.

Physical characteristics: The stones (total weight 318 g) have distinctive reddish-brown, clay-rich exterior coatings. Fresh interiors exhibit whitish clasts in a dark-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral clasts of olivine, anorthite, exsolved pigeonite, orthopyroxene, unexsolved pigeonite, augite, chromite and ilmenite, plus sparse glass fragments, in a finer grained partly vesicular matrix.

Geochemistry: Olivine (Fa20.1-53.8, FeO/MnO = 94-109, N = 3), orthopyroxene (Fs30.6Wo3.4, FeO/MnO = 54), low-Ca pyroxene host in exsolved pigeonite (Fs41.6Wo5.5, FeO/MnO = 57), pigeonite (Fs25.4Wo9.8, FeO/MnO = 54), augite (Fs10.0Wo42.9, FeO/MnO = 40), plagioclase (An96.4-96.7Or0.2, N = 2).

Classification: Lunar (feldspathic regolith breccia).

Specimens: 20.07 g in the form of a polished endcut at PSF; remainder with P. Pelé.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Rissani
Date:P 2017 Apr
Mass (g):318
Pieces:several
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):20.1-53.8
Ferrosilite (mol%):30.6; 41.6; 25.4; 10.0
Wollastonite (mol%):3.4; 5.5; 9.8; 42.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.07
Type spec location:PSF
Main mass:P. Pelé
Comments:Work name PMP17-1; submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6900 approved meteorites from (Northwest Africa) (plus 2035 unapproved names)

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