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Northwest Africa 12237
Basic information Name: Northwest Africa 12237
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12237
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 479 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 2 Dec 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12237 (NWA 12237)

(Northwest Africa)

Purchased: 2017

Classification: Ureilite

History: Purchased by Suzanne Morrison from a Moroccan meteorite dealer in Tucson, 2017.

Physical characteristics: Single stone with dark brown, weathered exterior.

Petrography: (C. Agee, UNM) This meteorite consists of olivine, pigeonite, and Fe-metal. Ubiquitous, finely disseminated Fe-metal occupies zones between silicate grain boundaries. Graphite is present.

Geochemistry: (C. Agee, UNM) Olivine Fa22.0±0.2, Fe/Mn=50±3, Cr2O3=0.72±0.18 (wt%), n=6; pigeonite Fs18.8±0.1Wo6.0±0.2, Fe/Mn=32±2, n=6.

Classification: Ureilite

Specimens: 20.2 g including a probe mount on deposit at UNM, Suzanne Morrison holds the main mass.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2017
Mass (g):478.8
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):22.0±0.2
Ferrosilite (mol%):18.8±0.1
Wollastonite (mol%):6.0±0.2
Classifier:C. Agee, UNM
Type spec mass (g):20.2
Type spec location:UNM
Main mass:Suzanne Morrison
Comments:Field name SM-1; submitted by C. Agee, UNM
Institutions
   and collections		 UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
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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