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Northwest Africa 11027
Basic information Name: Northwest Africa 11027
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11027
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 65.9 g
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 358 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 26 Jan 2017
Writeup from MB 106:

Northwest Africa 11027 (NWA 11027)

(Northwest Africa)

Purchased: 2016 Aug

Classification: HED achondrite (Eucrite, polymict)

History: Puchased in Temara, Morocco by Adam Aaronson in October 2016.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed predominantly of lithic eucrite clasts and related crystalline debris, with subordinate (<10 vol.%) diogenitic orthopyroxene grains (exhibiting magnesian cores and more ferroan reaction rims). Textures in lithic clasts range from intersertal to variolitic; some symplectite clasts composed of fayalite+hedenbergite+silica polymorph also are present. Other minerals are clinopyroxene, anorthitic plagioclase, silica polymorph, sodic bytownite, ilmenite, troilite, rare baddeleyite and Ni-free metal.

Geochemistry: Diogenitic orthopyroxene (cores Fs23.3-26.9Wo0.8-4.1; rims Fs47.0-54.0Wo0.8-1.9; FeO/MnO = 30-38, N = 2), clinopyroxene (Fs34.6-45.4Wo42.1-35.5, FeO/MnO = 28-29, N = 2), fayalitic olivine (Fa77.4-77.9, FeO/MnO = 43-44, N = 2), anorthite (An90.1Or0.3), bytownite (An76.4Or1.5).

Classification: Eucrite (polymict breccia).

Specimens: 13.2 g including one polished thin section at UWB; remainder with Aaronson.

Data from:
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2016 Aug
Mass (g):65.9
Shock stage:low
Weathering grade:low
Fayalite (mol%):77.4-77.9
Ferrosilite (mol%):23.3-26.9; 34.6-45.4
Wollastonite (mol%):0.8-4.1; 42.1-35.5
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):13.2
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1959; 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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
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 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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