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Northwest Africa 11957
Basic information Name: Northwest Africa 11957
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11957
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 251 g
Classification
  history:
Recommended:  CV3    [explanation]

This is 1 of 493 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 15 Sep 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11957 (NWA 11957)

(Northwest Africa)

Purchased: 2018 Mar

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Fabien Kuntz in March 2018 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Granular chondrules (apparent diameter 950±450 µm) and irregularly-shaped, very fine grained CAI are set in a fine grained matrix (~40 vol.%, deep sepia brown in thin section).

Geochemistry: Olivine (Fa1.2-58.7, N = 3), orthopyroxene (Fs1.1-1.2Wo0.7-4.2, N = 3), clinopyroxene (Fs0.6Wo46.7; Fs0.8-1.0Wo50.0-49.5, N = 3).

Classification: Carbonaceous chondrite (CV3).

Specimens: 21.82 g including one polished thin section at UWB; remainder with Kuntz.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Zagora
Date:P 2018 Mar
Mass (g):251
Pieces:several
Class:CV3
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):1.2-58.9
Ferrosilite (mol%):1.1-1.2
Wollastonite (mol%):0.7-4.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.82
Type spec location:UWB
Main mass:FKuntz
Comments:Work name K386; 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)
Kuntz: Fabien Kuntz, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2047 unapproved names)

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