Meteoritical Bulletin: Entry for Northwest Africa 14266

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Northwest Africa 14266

Basic information

Name: Northwest Africa 14266
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14266
Observed fall: No
Year found: 2019
Country: Mali
Mass: 475 g

Classification
history:

Recommended:

L4/5 [explanation]

This is 1 of 82 approved meteorites (plus 1 unapproved name) classified as L4/5. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 6 Oct 2021

Writeup

Writeup from MB 110:

Northwest Africa 14266 (NWA 14266)

Mali

Purchased: 2019 Aug

Classification: Ordinary chondrite (L4/5)

History: Purchased by Mbark Arjdal in August 2019 from a Malian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Some well-formed chondrules occur within a recrystallized matrix containing sodic plagioclase, altered kamacite, troilite, pentlandite and merrillite.

Geochemistry: Olivine (Fa_25.1±0.1, range Fa_25.0-25.2, N = 5), low-Ca pyroxene (Fs_21.1±0.2Wo_0.7±0.1, range Fs_20.8-21.2Wo_1.3-1.9, N = 5), augite (Fs_7.6±0.2Wo_45.6±0.7, range Fs_7.4-7.8Wo_45.0-46.3, N = 3).

Classification: Ordinary chondrite (L4/5).

Specimens: 36.7 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Mali
Date:	P 2019 Aug
Mass (g):	475
Pieces:	1
Class:	L4/5
Shock stage:	S2
Weathering grade:	W1
Fayalite (mol%):	25.1±0.1
Ferrosilite (mol%):	21.1±0.2
Wollastonite (mol%):	0.7±0.1
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	36.7
Type spec location:	UWB
Main mass:	M. Arjdal
Comments:	Work name Arj ZM 659; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 110, in preparation (2021)

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Geography:

Mali

Coordinates:

Unknown.

Statistics:
This is 1 of 69 approved meteorites from Mali (plus 1 unapproved name)

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