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Northwest Africa 11191
Basic information Name: Northwest Africa 11191
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11191
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 100 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 179 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 10 Apr 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11191 (NWA 11191)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite, brecciated)

History: Purchased by Dustin Dickens in 2016 from Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Gabbroic eucrite clasts and related debris are set in a very fine grained, partly vitric and vesicular quenched matrix. The major minerals are pigeonite (pale orange in thin section; some exsolved and some unexsolved) and polycrystallline calcic plagioclase, together with accessory silica polymorph, ilmenite, Ti-chromite, Cr-rich chromite, zircon, troilite and barite.

Geochemistry: Orthopyroxene host (Fs59.1-62.3Wo4.1-2.2, FeO/MnO = 32-33, N = 2), clinopyroxene exsolution lamellae (Fs27.0-27.9Wo43.3-42.5, FeO/MnO = 32-35, N = 2), plagioclase (An89.9-90.7Or1.4-0.4, N = 2).

Classification: Eucrite breccia (gabbroic, shock melted).

Specimens: 21 g including one polished thin section at UWB; remainder with Mr. D. Dickens.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016
Mass (g):100
Pieces:1
Class:Eucrite-br
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):59.1-62.3; 27.0-27.9
Wollastonite (mol%):4.1-2.2; 43.3-42.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21
Type spec location:UWB
Main mass:D. Dickens
Comments:DD16-2; submitted by A. Irving
Institutions
   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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 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.
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Christophe PICQ   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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