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Northwest Africa 8224
Basic information Name: Northwest Africa 8224
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8224
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 22 g
Meteoritical Bulletin:  MB 103  (2014)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 391 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 May 2014
Writeup from MB 103:

Northwest Africa 8224 (NWA 8224)

(Northwest Africa)

Purchased: 2013 Dec

Classification: HED achondrite (Eucrite, polymict)

History: Purchased in Temara, Morocco by Adam Aaronson in December 2013.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh fragmental breccia composed of both gabbroic and basaltic eucrite clasts plus related mineral debris, and rare diogenitic orthopyroxene. Minerals are exsolved pigeonite, calcic plagioclase, olivine, fayalite, pigeonite, hedenbergite, silica polymorph, ilmenite, Ti-chromite, troilite and altered Ni-free metal.

Geochemistry: Diogenitic orthopyroxene (Fs27.8Wo3.4; FeO/MnO = 27), host orthopyroxene (Fs60.1Wo5.4; FeO/MnO = 32), clinopyroxene exsolution lamellae (Fs27.5Wo41.1; FeO/MnO = 33), pigeonite (Fs35.6-35.8Wo10.4-7.2; FeO/MnO = 30), hedenbergite (Fs58.9Wo35.4; FeO/MnO = 37), olivine (Fa42.9; FeO/MnO = 51), fayalite (Fa78.6; FeO/MnO = 42).

Classification: Eucrite, polymict breccia.

Specimens: 4.7 g including a polished thin section at UWB. The remainder is held by Aaronson.

Data from:
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2013 Dec
Mass (g):22
Shock stage:low
Weathering grade:low
Fayalite (mol%):42.9; 78.6
Ferrosilite (mol%):27.8; 60.1; 27.5
Wollastonite (mol%):3.4; 5.4; 41.1
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):4.7
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1638; 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 Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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