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Northwest Africa 8180
Basic information Name: Northwest Africa 8180
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8180
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 235 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 571 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 3 Aug 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8180 (NWA 8180)

(Northwest Africa)

Purchased: 2013 Nov

Classification: HED achondrite (Eucrite)

History: Purchased in Temara, Morocco by A. Aaronson.

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed predominantly of large gabbroic eucrite clasts in a sparse matrix of related debris. Minerals are exsolved pigeonite (with variable red-brown staining), calcic plagioclase (polycrystalline, birefringent), silica polymorph, ilmenite, Ti-bearing chromite, troilite and minor secondary barite.

Geochemistry: Orthopyroxene host (Fs59.4-59.9Wo4.6-3.6, FeO/MnO =28-30), clinopyroxene exsolution lamellae (Fs27.5-29.2Wo42.6-40.1, FeO/MnO = 28-31).

Classification: Eucrite (polymict, gabbroic). Based on primary textures, shock features and style of weathering, this material is likely paired with NWA 7989, NWA 8036 and NWA 8056.

Specimens: A total of 23 g including one polished thin section at UWB. The remaining material is held by Aaronson.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2013 Nov
Mass (g):235
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:moderate
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):23
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1622; 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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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