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Northwest Africa 10309
Basic information Name: Northwest Africa 10309
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10309
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 16.52 kg
Meteoritical Bulletin:  MB 104  (2015)  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 22 Oct 2015
Writeup from MB 104:

Northwest Africa 10309 (NWA 10309)

(Northwest Africa)

Purchased: 2015 Aug

Classification: Lunar meteorite (feldspathic breccia)

History: A group of similar stones (total weight 16518 g, the largest weighing 6404 g) were found together at an undisclosed location in Mauritania, and were purchased by Darryl Pitt in August 2015 from a dealer in Mauritania.

Physical characteristics: All pieces lack fusion crust but the exteriors exhibit a thin desert patina. Interiors consist of angular white clasts (up to 1.5 cm across, some with minor red-brown staining) set within a fine grained, medium-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral clasts of anorthite, pigeonite (some exsolved), orthopyroxene, subcalcic augite, olivine, chromite (both Ti-rich and Ti-poor varieties) in a finer grained, partly vesicular matrix containing kamacite, troilite and Ni-poor taenite.

Geochemistry: Olivine (Fa8.6-54.3, FeO/MnO = 82-96, N = 4), orthopyroxene (Fs18.7Wo2.8, FeO/MnO = 56), subcalcic augite (Fs18.1Wo31.8, FeO/MnO = 60), low-Ca pyroxene host (Fs50.4Wo6.1, FeO/MnO = 63), augite exsolution lamellae (Fs24.2Wo41.4, FeO/MnO = 50), plagioclase (An95.8-96.1Or0.2, N = 2).

Classification: Lunar (feldspathic regolithic breccia).

Specimens: 22.16 g including one polished thin section at UWB; main mass with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2015 Aug
Mass (g):16518
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):8.6-54.3
Ferrosilite (mol%):18.7; 18.1
Wollastonite (mol%):2.8; 31.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22.16
Type spec location:UWB
Main mass:DPitt
Comments:MAC 166; 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)
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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

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