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Northwest Africa 12760
Basic information Name: Northwest Africa 12760
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12760
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 58.09 kg
Meteoritical Bulletin:  MB 108  (2020)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 340 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 3 Aug 2019
Writeup from MB 108:

Northwest Africa 12760 (NWA 12760)

(Northwest Africa)

Find: 2017 Apr

Classification: Lunar meteorite (feldspathic breccia)

History: A single very large, uncrusted stone (58.090 kg) was found in April 2017 in Western Sahara or the Western Sahara/Algeria border region, and purchased by Darryl Pitt in June 2017 from a Mauritanian dealer

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of mineral clasts of anorthite, olivine, orthopyroxene, exsolved pigeonite, unexsolved pigeonite and augite within a sparsely vesicular and partly glassy matrix containing troilite, magnesian ilmenite, chromite and minor secondary barite.

Geochemistry: Olivine (Fa19.1-35.9, FeO/MnO = 88-97, N = 4), low-Ca pyroxene (Fs31.1-45.4Wo4.6-6.1, FeO/MnO = 50-56, N = 3), augite (Fs14.8Wo40.8, FeO/MnO = 38), pigeonite host in exsolved pyroxene (Fs38.4Wo12.7, FeO/MnO = 58), low-Ca pyroxene lamellae in exsolved pyroxene (Fs46.9-52.6Wo4.3-5.3, FeO/MnO = 57, N = 2), plagioclase (An96.4-97.2Or0.1, N = 2).

Classification: Lunar (feldspathic breccia).

Specimens: 20.1 g including a polished endcut at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:2017 Apr
Mass (g):58090
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):19.1-35.9
Ferrosilite (mol%):31.1-45.4; 14.8
Wollastonite (mol%):4.6-6.1; 40.8
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.1
Type spec location:UWB
Main mass:D. Pitt
Comments:Work name MVCH 270B; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

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