Meteoritical Bulletin: Entry for Northwest Africa 11957

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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: 251 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	CV3
Recommended:			CV3 [explanation]

This is 1 of 481 approved meteorites (plus 2 unapproved names) 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

Writeup

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 (Fa_1.2-58.7, N = 3), orthopyroxene (Fs_1.1-1.2Wo_0.7-4.2, N = 3), clinopyroxene (Fs_0.6Wo_46.7; Fs_0.8-1.0Wo_50.0-49.5, 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Kuntz: Fabien Kuntz, France; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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