Meteoritical Bulletin: Entry for Northwest Africa 11954

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Northwest Africa 11954

Basic information

Name: Northwest Africa 11954
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11954
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass: 270 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	LL3
Recommended:			LL3 [explanation]

This is 1 of 507 approved meteorites classified as LL3. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 15 Sep 2018

Writeup

Writeup from MB 107:

Northwest Africa 11954 (NWA 11954)

(Northwest Africa)

Purchased: 2017 Nov

Classification: Ordinary chondrite (LL3)

History: Purchased by Fabien Kuntz in November 2017 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed chondrules (apparent diameter 690±450 µm) are set in relatively fine grained matrix containing stained metal, merrillite and chlorapatite.

Geochemistry: Olivine (Fa_1.3-44.0, Cr₂O₃ in ferroan examples 0.06-0.36 wt.%, mean 0.12±0.12 wt.%, N = 7), orthopyroxene (Fs_2.5-15.1Wo_0.4-1.5, N = 3), clinopyroxene (Fs_9.3-12.5Wo_39.6-37.4, N = 2). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 3.80.

Classification: Ordinary chondrite (LL3). LL classification from magnetic susceptibility.

Specimens: 22.41 g including one polished thin section at UWB; remainder with FKuntz.

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Zagora
Date:	P 2017 Nov
Mass (g):	270
Pieces:	1
Class:	LL3
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	1.3-44.0
Ferrosilite (mol%):	2.5-15.1
Wollastonite (mol%):	0.4-1.5
Magnetic suscept.:	3.80
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	22.41
Type spec location:	UWB
Main mass:	FKuntz
Comments:	Work name K372; 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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