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Northwest Africa 16267
Basic information Name: Northwest Africa 16267
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16267
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 1977 g
Classification
  history:
Meteoritical Bulletin:  MB 112  (2024)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 344 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 10 Nov 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 16267 (NWA 16267)

(Northwest Africa)

Purchased: 2022 Oct

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Luc Labenne in October 2022 from a Moroccan dealer.

Petrography: (A. Irving, UWS, and P. Carpenter, WUSL) Breccia composed of angular mineral clasts of calcic plagioclase, olivine and low-Ca pyroxenes, plus some fine-grained, melt-textured lithic clasts, within a very fine grained fragmental matrix. Some olivine is altered to serpentine-like phyllosilicates with low oxide sums and elevated FeO/MnO ratios. Accessory phases include Mg-ilmenite, Ti-free chromite, pentlandite, troilite and rare kamacite (altered to secondary Fe oxides).

Geochemistry: Olivine (Fa20.2-43.2, FeO/MnO = 74-102, N = 10), low-Ca pyroxene (Fs17.4-18.8Wo3.6-3.8, FeO/MnO = 43-52, N = 3), pigeonite (Fs25.1-31.7Wo13.0-8.5; FeO/MnO = 41-59, N = 4), subcalcic augite (Fs19.7-20.6Wo29.6-29.4, FeO/MnO = 47-49, N = 2), anorthite (An96.6-97.8Or0.1-0.0, N = 4), calcic plagioclase (An75.7Or0.6; An85.0Or0.4; N = 2).

Classification: Lunar (feldspathic breccia).

Specimens: 23.7 g including one polished thin section at UWB; remainder with Labenne.

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2022 Oct
Mass (g):1977
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):20.2-43.2
Ferrosilite (mol%):17.4-18.8;25.1-31.7; 19.7-20.6
Wollastonite (mol%):3.6-3.8; 13.0-8.5; 29.6-29.4
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):23.7
Type spec location:UWB
Main mass:Labenne
Comments:Work name LAB23-2; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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