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Northwest Africa 10181
Basic information Name: Northwest Africa 10181
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10181
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 880 g
Meteoritical Bulletin:  MB 104  (2015)  Diogenite-pm
Recommended:  Diogenite-pm    [explanation]

This is 1 of 50 approved meteorites classified as Diogenite-pm.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 3 Oct 2015
Writeup from MB 104:

Northwest Africa 10181 (NWA 10181)

(Northwest Africa)

Purchased: 2015 Feb

Classification: HED achondrite (Diogenite, polymict)

History: Purchased by GHupé in January 2015 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed of predominantly diogenitic orthopyroxene clasts (~95 vol.% of clast population), autolithic breccia clasts, sparse basaltic eucrite clasts, plus related mineral debris set within a sparse matrix (constituting ~5 vol.% of the specimen). Other minerals are exsolved pigeonite, calcic plagioclase, pigeonite, olivine, silica polymorph, Al-Ti-chromite, stained kamacite, taenite and troilite.

Geochemistry: Olivine (Fa34.9-36.8, FeO/MnO = 47-53, N = 2), diogenitic orthopyroxene (Fs23.0-23.1Wo1.8-2..6, FeO/MnO = 30-33, N = 3), orthopyroxene host (Fs61.7Wo2.4, FeO/MnO = 33), clinopyroxene exsolution lamella (Fs29.1Wo42.0, FeO/MnO = 36), pigeonite (Fs46.7Wo5.2, FeO/MnO = 22).

Classification: Diogenite (polymict breccia). Eucrite material makes about 5 vol% of the meteorite.

Specimens: 35 g including one polished thin section at UWB. The remainder is held by GHupé.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2015 Feb
Mass (g):880
Shock stage:low
Weathering grade:low
Fayalite (mol%):34.9-36.8
Ferrosilite (mol%):23.0-23.1; 61.7; 29.1; 46.7
Wollastonite (mol%):1.8-2.6; 2.4; 42.0; 5.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):35.0
Type spec location:UWB
Main mass:G. Hupe
Comments:GH-467; 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)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
Hupe: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 8138 approved meteorites from (Northwest Africa) (plus 1941 unapproved names)

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