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Northwest Africa 7321
Basic information Name: Northwest Africa 7321
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7321
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 109 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  Acapulcoite
Recommended:  Acapulcoite    [explanation]

This is 1 of 74 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Comments: Approved 24 Apr 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7321 (NWA 7321)

(Northwest Africa)

Purchased: 2012 Apr

Classification: Primitive achondrite (Acapulcoite)

History: Purchased by Stefan Ralew in April 2012 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively fine grained and equigranular with abundant triple-grain junctions between silicate minerals. Minerals are orthopyroxene, olivine, clinopyroxene, sodic plagioclase, altered kamacite and troilite. Chromite appears to be absent.

Geochemistry: Orthopyroxene (Fs11.5-11.6Wo2.0-1.4, FeO/MnO = 12-14), olivine (Fa12.3-13.1, FeO/MnO = 19-20), clinopyroxene (Fs4.3-5.2Wo45.3-43.8, FeO/MnO = 9).

Classification: Acapulcoite

Specimens: 20.85 g of sample and one polished thin section are on deposit at UWB. S. Ralew holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2012 Apr
Mass (g):109
Pieces:1
Class:Acapulcoite
Shock stage:low
Weathering grade:low
Fayalite (mol%):12.3-13.1
Ferrosilite (mol%):11.5-11.6; 4.3-5.2
Wollastonite (mol%):2.0-1.4; 45.3-43.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.85
Type spec location:UWB
Main mass:S. Ralew
Comments:RA12-20; 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)
Ralew: Stefan Ralew, Kunibertstra├če 29, 12524 Berlin, Germany; Website (private address)
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)
bphd   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2061 unapproved names)

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