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Northwest Africa 12271
Basic information Name: Northwest Africa 12271
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12271
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 925 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 604 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 2 Dec 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12271 (NWA 12271)

(Northwest Africa)

Purchased: 2018

Classification: Ureilite

History: Purchased in Guelmim, Morocco, July 2018.

Physical characteristics: Single stone; sandblasted exterior; saw cut reveals an interior mosaic of brown crystals; minor amount iron-staining present.

Petrography: (C. Agee, UNM) This meteorite consists of olivine, pigeonite, and augite. Ubiquitous graphite throughout. Fine grained Fe-metal is present along grain boundaries.

Geochemistry: (C. Agee) olivine Fa20.8±0.1, Fe/Mn=44±1, n=7; pigeonite Fs17.4±0.2Wo4.3±0.2, Fe/Mn=27±2, n=5; augite Fs10.9±0.1Wo34.5±0.1, Fe/Mn=19±0, n=2.

Classification: Augite and graphite-bearing ureilite

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

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018
Mass (g):925
Pieces:1
Class:Ureilite
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):20.8±0.1
Ferrosilite (mol%):17.4±0.2, 10.9±0.1
Wollastonite (mol%):4.3±0.2, 34.5±0.1
Classifier:C. Agee, UNM
Type spec mass (g):20.2
Type spec location:UNM
Main mass:Zouhair Fettouh
Comments:Field name Z-3; 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 8420 approved meteorites from (Northwest Africa) (plus 1900 unapproved names)

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