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Northwest Africa 11271
Basic information Name: Northwest Africa 11271
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11271
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 315 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 431 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 28 Jun 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11271 (NWA 11271)

(Northwest Africa)

Purchased: 2017 Feb

Classification: HED achondrite (Eucrite)

History: Purchased by Aras Jonikas in February 2017 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of closely-packed microgabbroic clasts with sparse matrix. Minerals are exsolved pigeonite, calcic plagioclase (exhibiting undulose extinction), silica polymorph, ilmenite, chromite, troilite and minor calcite.

Geochemistry: Orthopyroxene host (Fs59.7-62.6Wo6.1-2.1, FeO/MnO = 30-32, N = 3), clinopyroxene exsolution lamellae (Fs28.0-28.3Wo42.9-42.4, FeO/MnO = 34, N = 2), plagioclase (An88.3-90.3Or0.7, N = 2).

Classification: Eucrite (monomict breccia, microgabbroic).

Specimens: 20.72 g including one polished thin section at PSF; remainder with Mr. A. Jonikas.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2017 Feb
Mass (g):315
Pieces:many
Class:Eucrite
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):59.7-62.6; 28.0-28.3
Wollastonite (mol%):5.1-2.1; 42.9-42.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.72
Type spec location:PSF
Main mass:A. Jonikas
Comments:Work name AJ17-2; submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Catalogs:
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.
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6900 approved meteorites from (Northwest Africa) (plus 2035 unapproved names)

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