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Northwest Africa 11127
Basic information Name: Northwest Africa 11127
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11127
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 475 g
Meteoritical Bulletin:  MB 106  (2018)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 291 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 14 Mar 2017
Writeup from MB 106:

Northwest Africa 11127 (NWA 11127)

(Northwest Africa)

Purchased: 2016 Apr

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Darryl Pitt in April 2016 from a dealer in Mauritania.

Physical characteristics: A single stone (474.6 g) lacking fusion crust and consisting of diffuse white to pale brownish clasts in a medium gray, very fine-grained matrix containing small vesicles.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of lithic clasts and angular mineral grains of anorthite, olivine, orthopyroxene, pigeonite and exsolved pigeonite with accessory kamacite, Ti-chromite, ilmenite and minor troilite in a sparse finer grained, partly devitrified matrix (exhibiting "swirly" texture). The majority of the lithic clasts are fine grained melt rocks. Veinlets of shock glass plus secondary calcite and minor barite are present.

Geochemistry: Olivine (Fa8.9-45.0, FeO/MnO = 74-79, N = 3), orthopyroxene (Fs20.9Wo4.6, FeO/MnO = 64), pigeonite (Fs40.9Wo19.2, FeO/MnO = 56), high-Ca pyroxene host (Fs17.3Wo41.1, FeO/MnO = 79), low-Ca exsolution lamella (Fs36.4Wo5.3, FeO/MnO = 61), plagioclase (An96.4-96.5Or0.2, N = 2). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances (in wt.%) FeO 3.7, Na2O 0.34; (in ppm) Sc 14.5, Ni 90, La 4.4, Sm 1.76, Eu 0.75, Yb 1.5, Lu 0.22, Hf 1.4, Th 0.57.

Classification: Lunar (feldspathic breccia).

Specimens: 20.6 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2016 Apr
Mass (g):474.6
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):8.9-45.0
Ferrosilite (mol%):20.9; 40.9; 17.3; 36.4
Wollastonite (mol%):4.6; 19.2; 41.1; 5.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.6
Type spec location:UWB
Main mass:D. Pitt
Comments:MVCH 64; 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 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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