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Northwest Africa 14977
Basic information Name: Northwest Africa 14977
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14977
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 849 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 25 May 2022
Writeup from MB 111:

Northwest Africa 14977 (NWA 14977)


Purchased: 2021 Nov

Classification: Lunar meteorite (feldspathic breccia)

History: A group of similar-appearing small stones was found in Algeria in 2021 and purchased by Ali Benamar in November 2021 from an Algerian dealer. Some of this material was sold subsequently to Mark Lyon and Sun Chul Lee.

Physical characteristics: The 45 small stones (total weight 849 g) are all dark gray with visible whitish clasts.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL). Breccia composed of mineral clasts of anorthite, olivine, low-Ca pyroxene, pigeonite, exsolved pigeonite and augite, plus rare lithic spinel troctolite clasts, in a fine grained matrix containing ilmenite, troilite, taenite and minor secondary barite.

Geochemistry: Anorthite (An95.1-96.6Or0.1-0.2, N = 3), olivine (Fa12.3-50.6, FeO/MnO = 85-103, N = 6), low-Ca pyroxene (Fs38.6-42.0Wo5.2-3.8, FeO/MnO = 61-63, N = 2), low-Ca pyroxene host (Fs53.4Wo3.1, FeO/MnO = 66), augite exsolution lamella (Fs23.1Wo44.4, FeO/MnO = 59), pigeonite (Fs29.3Wo7.9, FeO/MnO =59), augite (Fs17.2-25.4Wo41.0-45.9, FeO/MnO = 58-64, N = 3), spinel in troctolite clast (Mg0.845Fe0.151Al1.957Cr0.044O4).

Classification: Lunar (feldspathic breccia).

Specimens: 23.1 g including a polished endcut at UWB; remainder with Mr. M. Lyon (493 g), Mr. S. Lee (117) and Mr. A. Benamar (212 g).

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Nov
Mass (g):849
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):12.3-50.6
Ferrosilite (mol%):38.6-42.0; 29.3; 17.2-25.4
Wollastonite (mol%):5.2-3.8; 7.9; 41.0-45.9
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):23.1
Type spec location:UWB
Main mass:M. Lyon/ S. Lee/ A. Benamar
Comments:Work name 22AB-15; 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)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 1208 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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