Meteoritical Bulletin: Entry for Northwest Africa 11054

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Northwest Africa 11054

Basic information

Name: Northwest Africa 11054
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11054
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 204 g

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	LL(L)3
Recommended:			LL(L)3 [explanation]

This is 1 of 22 approved meteorites classified as LL(L)3. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 14 Feb 2017

Writeup

Writeup from MB 106:

Northwest Africa 11054 (NWA 11054)

(Northwest Africa)

Purchased: 2016 Oct

Classification: Ordinary chondrite (LL(L)3)

History: Purchased by John Higgins in October 2016 from a dealer in Nouakchott, Mauritania.

Petrography: (A. Irving and S. Kuehner, UWS) Closely packed, well-formed chondrules (apparent diameter 500±200 μm) are set in a sparse, fine grained matrix containing altered metal.

Geochemistry: Olivine (Fa_1.7-45.0, Cr₂O₃ in ferroan examples 0.06-0.39 wt.%, mean 0.12±0.13 wt.%, N = 7), orthopyroxene (Fs_2.9-15.4Wo_0.2-1.5, N = 3), pigeonite (Fs_23.3Wo_9.9), diopside (Fs_3.3Wo_47.9). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 4.36.

Classification: Ordinary chondrite (LL(L)3).

Specimens: 21.95 g including one polished thin section at UWB; remainder with Mr. J. Higgins.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Nouakchott, Mauritania
Date:	P 2016 Oct
Mass (g):	204
Pieces:	1
Class:	LL(L)3
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	1.7-45.0
Ferrosilite (mol%):	2.9-15.4
Wollastonite (mol%):	0.2-1.5
Magnetic suscept.:	4.36
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	21.95
Type spec location:	UWB
Main mass:	J. Higgins
Comments:	JH16-13; 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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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 7547 approved meteorites from (Northwest Africa) (plus 1970 unapproved names)

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