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Northwest Africa 8422
Basic information Name: Northwest Africa 8422
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8422
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 422 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Lodranite
Recommended:  Lodranite    [explanation]

This is 1 of 82 approved meteorites classified as Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites
Comments: Approved 25 Nov 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8422 (NWA 8422)

(Northwest Africa)

Purchased: 2014 Mar

Classification: Primitive achondrite (Lodranite)

History: Purchased in Temara, Morocco by Adam Aaronson in March 2014.

Petrography: (A. Irving and S. Kuehner, UWS) Protogranular aggregate (grainsize 0.8-3 mm) of olivine with reduced rims, subcalcic augite and low-Ca pyroxene with accessory altered metal.

Geochemistry: Olivine (cores Fa12.4-12.5, FeO/MnO = 22, N = 2; rims Fa5.0), subcalcic augite (Fs6.7-6.8Wo36.0-35.9; FeO/MnO = 12-13, N = 2) and low-Ca pyroxene (Fs10.7-10.9Wo4.9-4.7; FeO/MnO = 14-16, N = 2).

Classification: Lodranite. This specimen is unusual because of the presence of reduced rims on olivine grains.

Specimens: 20.1 g including one polished thin section at UWB. The remainder is held by Aaronson.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2014 Mar
Mass (g):422
Pieces:1
Class:Lodranite
Shock stage:low
Weathering grade:low
Fayalite (mol%):12.4-12.5
Ferrosilite (mol%):6.7-6.8; 10.7-10.9
Wollastonite (mol%):36.0-35.9; 4.9-4.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1692; paired with NWA 8410; 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
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7374 approved meteorites from (Northwest Africa) (plus 1957 unapproved names)

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