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Northwest Africa 7266
Basic information Name: Northwest Africa 7266
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7266
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 1206 g
Meteoritical Bulletin:  MB 102  (2013)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 6 Sep 2013
Writeup from MB 102:

Northwest Africa 7266 (NWA 7266)

(Northwest Africa)

Purchased: 2012 Feb

Classification: HED achondrite (Eucrite)

History: Purchased by GHupé in 2012 February from a Moroccan dealer at the Tucson Gem and Mineral Show.

Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen composed of rounded clasts (up to 8 mm across) of ophitic-textured basaltic eucrite in a deep brown, fine grained matrix. Clasts consist of exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite and troilite. Both pyroxene and plagioclase exhibit undulose extinction, and The matrix consists of numerous tiny crystal fragments derived from eucrites (as well as rare grains of merrillite) within brown glass.

Geochemistry: Exsolution lamellae of augite (Fs25.3-26.6Wo43.8-43.3; FeO/MnO = 31-32) within host orthopyroxene (Fs55.8-60.3Wo5.6-2.4; FeO/MnO = 30-32).

Classification: Eucrite. This specimen represents a basaltic eucrite protolith that has undergone fragmentation and partial melting, presumably as a consequence of impact processes.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2012 Feb
Mass (g):1206
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):25.3-26.6; 55.8-60.3
Wollastonite (mol%):43.8-43.3; 5.6-2.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20
Type spec location:UWB
Main mass:GHupé
Comments:GH-423; 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)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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