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Northwest Africa 14761
Basic information Name: Northwest Africa 14761
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14761
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 196 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 19 Mar 2022
Writeup from MB 111:

Northwest Africa 14761 (NWA 14761)

(Northwest Africa)

Purchased: 2021 Jun

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Jason Whitcomb in June 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fine grained breccia composed of numerous small mineral clasts of anorthite, olivine, low-Ca pyroxene, subcalcic augite and augite, plus some larger glass-bearing lithic clasts, set in a very fine grained, partly vesicular and partly glassy matrix containing ilmenite, baddeleyite, medium-Ti chromite and kamacite.

Geochemistry: Olivine (Fa24.2-53.9, FeO/MnO = 89-100, N = 4), low-Ca pyroxene (Fs18.4-32.8Wo3.3-4.2, FeO/MnO = 53-58, N = 3), subcalcic augite (Fs9.2Wo23.0, FeO/MnO = 47), augite (Fs17.0-24.5Wo36.0-32.2, FeO/MnO = 48-54, N = 2), anorthite (An95.5-96.6Or0.1, N = 3).

Classification: Lunar (feldspathic breccia).

Specimens: 13.27 g including one polished slice at PSF; remainder with Mr. J. Whitcomb.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Jun
Mass (g):196
Class:Lunar (feldsp. breccia)
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):24.2-53.9
Ferrosilite (mol%):18.4-32.8; 9.2; 17.0-24.5
Wollastonite (mol%):3.3-4.2; 23.0; 36.0-32.2
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.7
Type spec location:PSF
Main mass:J. Whitcomb
Comments:Work name JW-74; submitted by A. Irving
   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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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