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Northwest Africa 8264
Basic information Name: Northwest Africa 8264
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8264
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 57.9 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 419 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 May 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8264 (NWA 8264)

(Northwest Africa)

Purchased: 2014 Jan

Classification: HED achondrite (Eucrite)

History: Purchased by F. Kuntz in January 2014 from a dealer in Tagounite, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh specimen composed of prismatic phenocrysts of exsolved pigeonite set in an extremely fine grained, quenched matrix containing orthopyroxene, clinopyroxene, calcic plagioclase, silica polymorph, ilmenite, Ti-chromite and troilite.

Geochemistry: Host orthopyroxene (Fs55.8-57.2Wo2.0-1.6, FeO/MnO = 33-34), clinopyroxene exsolution lamellae (Fs21.9-23.6Wo45.5-44.2, FeO/MnO = 28-33).

Classification: Eucrite, unbrecciated. This specimen is a texturally-unusual among eucrites in being porphyritic with an extremely fine grained, quenched groundmass.

Specimens: 12.0 g including a polished thin section at UWB. The remainder is held by Kuntz.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Tagounite
Date:P 2014 Jan
Mass (g):57.9
Pieces:5
Class:Eucrite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):55.8-57.2; 21.9-23.6
Wollastonite (mol%):2.0-1.6; 45.5-44.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):12.0
Type spec location:UWB
Main mass:F. Kuntz
Comments:K205; 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)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6752 approved meteorites from (Northwest Africa) (plus 2052 unapproved names)

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