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Northwest Africa 7474
Basic information Name: Northwest Africa 7474
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7474
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 348 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Lodranite
Recommended:  Lodranite    [explanation]

This is 1 of 83 approved meteorites classified as Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites
Comments: Approved 3 Jun 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7474 (NWA 7474)

(Northwest Africa)

Purchased: 2012 Aug

Classification: Primitive achondrite (Lodranite)

History: Purchased in Temara, Morocco by Adam Aaronson in August 2012.

Petrography: (A. Irving and S. Kuehner, UWS) Coarse-grained protogranular aggregate (grain size 0.4-1.2 mm) of olivine, orthopyroxene, clinopyroxene and ~18 vol.% stained kamacite (as holly-leaf-shaped grains).

Geochemistry: Olivine (Fa13.5-13.6; FeO/MnO = 25-27), orthopyroxene (Fs12.3-12.5Wo2.8-2.3; FeO/MnO = 16-17), clinopyroxene (Fs4.8-6.2Wo44.5-39.2; FeO/MnO = 9-12).

Classification: Lodranite

Specimens: 20.7 g of sample and one polished thin section are on deposit at UWB. Aaronson holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2012 Aug
Mass (g):348
Pieces:1
Class:Lodranite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):13.5-13.6
Ferrosilite (mol%):12.3-12.5; 4.8-6.2
Wollastonite (mol%):2.8-2.3; 44.5-39.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.7
Type spec location:UWB
Main mass:A. Aaronson
Comments:M1400; 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. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Wang Ziyao   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7483 approved meteorites from (Northwest Africa) (plus 1994 unapproved names)

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