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Northwest Africa 12321
Basic information Name: Northwest Africa 12321
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12321
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 194 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 623 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 14 Dec 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12321 (NWA 12321)

(Northwest Africa)

Purchased: 2004 Oct

Classification: Ureilite

History: Purchased in Erfoud, Morocco by Adam Aaronson in October 2004.

Petrography: (A. Irving and S. Kuehner, UWS) Protogranular aggregate of olivine (~80 vol.%) and pigeonite (~20 vol.%). Olivine exhibits dark reduced, magnesian rims. Minor grain boundary graphite was observed.

Geochemistry: Olivine (cores Fa21.9-22.2; rim Fa7.4; N = 3), pigeonite (Fs 18.4-18.5Wo9.3-9.2, N = 2).

Classification: Ureilite.

Specimens: 20.1 g including one polished thin section at UWB; remainder with Aaronson.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2004 Oct
Mass (g):194
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:low
Fayalite (mol%):21.9-22.2
Ferrosilite (mol%):18.4-18.5
Wollastonite (mol%):9.3-9.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:A. Aaronson
Comments:Work name M365; 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. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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