Meteoritical Bulletin: Entry for Northwest Africa 11426

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Northwest Africa 11426

Basic information

Name: Northwest Africa 11426
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11426
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass: 5.6 kg

Classification
history:

Meteoritical Bulletin:	MB 106	(2018)	L3-6
Recommended:			L3-6 [explanation]

This is 1 of 61 approved meteorites classified as L3-6. [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 6 Dec 2017

Writeup

help

Writeup from MB 106:

Northwest Africa 11426 (NWA 11426)

(Northwest Africa)

Purchased: 2017 May

Classification: Ordinary chondrite (L3-6)

History: Purchased by Wen Chang Chen in May 2017 from a Moroccan dealer at the Hunan Show.

Petrography: (A. Irving and S. Kuehner, UWS) The specimen consists of abundant well-formed chondrules (apparent diameter 600±300 µm), some unequilibrated, plus sparse angular mineral and lithic clasts in a finer grained matrix containing chlorapatite and merrillite. Clasts include more equilibrated L5 and L6 chondrites, plus rare large (up to 7 mm) stained, angular troilite grains.

Geochemistry: Olivine (Fa_12.6-28.3, Cr₂O₃ < 0.02 wt.%, N = 6), orthopyroxene (Fs_2.2-23.8Wo_0.2-1.8, N = 3), subcalcic augite (Fs_11.7Wo_27.0; Fs_29.0Wo_35.1; N = 2), augite (Fs_10.6Wo_44.6). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 4.65.

Classification: Ordinary chondrite (L3-6 breccia).

Specimens: 99.1 g including one polished thin section at UWB; remainder with Mr. W. Chen.

Data from:
  MB106
  Table 0
  Line 0:

Place of purchase:	Hunan, China
Date:	P 2017 May
Mass (g):	5600
Pieces:	1
Class:	L3-6
Shock stage:	S2
Weathering grade:	W1/2
Fayalite (mol%):	12.6-28.3
Ferrosilite (mol%):	2.2-23.8; 11.7
Wollastonite (mol%):	0.2-1.8; 27.0
Magnetic suscept.:	4.65
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	99.1
Type spec location:	UWB
Main mass:	W. Chen
Comments:	Work name WCC17-1; 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.

Find references in NASA ADS:
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Photos:

Credit	Photos
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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