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Northwest Africa 11131
Basic information Name: Northwest Africa 11131
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11131
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 30 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  CK4
Recommended:  CK4    [explanation]

This is 1 of 121 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 26 Apr 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11131 (NWA 11131)

(Northwest Africa)

Purchased: 2016

Classification: Carbonaceous chondrite (CK4)

History: Purchased by Dustin Dickens in 2016 from a dealer in Amellagou Ksar Ait’ Youb, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Separated, well-delineated chondrules containing Cr-magnetite are set in a finer grained matrix composed mainly of mafic silicates with Cr-magnetite, altered metal, pyrite and minor barite. One CAI composed of anorthite+olivine+pleonaste was observed in the studied thin section.

Geochemistry: Olivine (Fa32.6-32.7, FeO/MnO = 116-120, N = 3), orthopyroxene (Fs26.7-26.8Wo0.6, N = 3), clinopyroxene (Fs8.8-10.2Wo46.8-46.9, N = 2).

Classification: Carbonaceous chondrite (CK4).

Specimens: 6.1 g including one polished thin section at UWB; remainder with Mr. D. Dickens.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Amellagou Ksar Ait' Youb, Morocco
Date:P 2016
Mass (g):30
Pieces:1
Class:CK4
Shock stage:S2
Weathering grade:low
Fayalite (mol%):32.6-32.7
Ferrosilite (mol%):26.7-26.8
Wollastonite (mol%):0.6-0.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):6.1
Type spec location:UWB
Main mass:D. Dickens
Comments:DD16-5; 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)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Photos:
CreditPhotos
Public domain photographs:
A. Irving   
Geography: 
Coordinates:Unknown.

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

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