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Northwest Africa 11061
Basic information Name: Northwest Africa 11061
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11061
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 1040 g
Meteoritical Bulletin:  MB 106  (2018)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 290 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 14 Feb 2017
Writeup from MB 106:

Northwest Africa 11061 (NWA 11061)

(Northwest Africa)

Purchased: 2016 Nov

Classification: Lunar meteorite (feldspathic breccia)

History: Purportedly found near the Algeria/Mali border in October 2016, and purchased by Darryl Pitt in November 2016 from a dealer in Mauritania.

Physical characteristics: A single stone (1040 g) lacking fusion crust. The fresh interior exhibits rounded, whitish anorthositic clasts (up to 1.8 cm across) and crystalline debris set in a medium-gray matrix containing obvious small vesicles.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral clasts of anorthite, exsolved pigeonite, olivine, orthopyroxene, pigeonite, ilmenite, Ti-chromite, Ti-free chromite, troilite and rare zircon, plus some lithic anorthosite clasts, in a finer grained, partly vesicular matrix of the same minerals.

Geochemistry: Olivine (Fa19.4-52.9, FeO/MnO = 68-91, N = 5), orthopyroxene (Fs23.6Wo3.5, FeO/MnO = 53), pigeonite (Fs36.7Wo15.4, FeO/MnO = 53), low-Ca pyroxene host in exsolved pigeonite (Fs44.5Wo7.1, FeO/MnO = 53), high-Ca pyroxene host in exsolved pigeonite (Fs24.6Wo36.4, FeO/MnO = 52), plagioclase (An97.1-97.6Or0.1, N = 2). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances (in wt.%) FeO 3.4, Na2O 0.32; (in ppm) Sc 6.6, Ni 100, La 1.8, Sm 0.79, Eu 0.78, Yb 0.64, Lu 0.09, Hf 0.58, Th 0.30. Magnetic susceptibility log χ (× 10-9 m3/kg) = 2.61.

Classification: Lunar (feldspathic regolith breccia).

Specimens: 20.7 g including a polished endcut at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2016 Nov
Mass (g):1040
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):19.4-52.9
Ferrosilite (mol%):23.6; 44.5; 36.7; 24.6
Wollastonite (mol%):3.5; 7.1; 15.4; 36.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.7
Type spec location:UWB
Main mass:D. Pitt
Comments:MVCH 211; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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