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Northwest Africa 10971
Basic information Name: Northwest Africa 10971
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10971
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 2.03 kg
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 258 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 17 Dec 2016
Writeup from MB 105:

Northwest Africa 10971 (NWA 10971)

(Northwest Africa)

Purchased: 2016 May

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Ben Hoefnagels in May 2016 from a dealer in Ouarzazate, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of microgabbroic eucrite clasts and related debris. Minerals are exsolved pigeonite (pale orange in thin section), calcic plagioclase (polycrystalline), silica polymorph, ilmenite, Ti-poor chromite, troilite and altered Ni-free metal. Calcite veins are present.

Geochemistry: Orthopyroxene host (Fs57.8Wo5.1, FeO/MnO = 29), clinopyroxene exsolution lamella (Fs27.7Wo42.4, FeO/MnO = 28), clinopyroxene host (Fs26.1Wo44.0, FeO/MnO = 28), orthopyroxene exsolution lamella (Fs62.2Wo1.9, FeO/MnO = 29), plagioclase (An89.1-89.8Or0.3-0.4, N = 2).

Classification: Eucrite (monomict breccia, microgabbroic, shocked).

Specimens: 34.89 g including one polished thin section at UWB; remainder with Mr. B. Hoefnagels.

Data from:
  Table 0
  Line 0:
Place of purchase:Ouarzazate
Date:P 2016 May
Mass (g):2027
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):57.8-61.2; 26.1-27.7
Wollastonite (mol%):5.1-1.9; 44.0-42.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):34.89
Type spec location:UWB
Main mass:B. Hoefnagels
Comments:BH027; 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 8394 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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