Meteoritical Bulletin: Entry for Northwest Africa 14296

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Northwest Africa 14296

Basic information

Name: Northwest Africa 14296
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14296
Observed fall: No
Year found: 2020
Country: Mali
Mass: 230 g

Classification
history:

Recommended:

L4 [explanation]

This is 1 of 1946 approved meteorites (plus 4 unapproved names) classified as L4. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 29 Jan 2022

Writeup

Writeup from MB 111:

Northwest Africa 14296 (NWA 14296)

Mali

Purchased: 2020 Apr

Classification: Ordinary chondrite (L4)

History: Purchased by Mbark Arjdal in April 2020 from a Malian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well formed, equilibrated chondrules are set in a fine grained matrix containing kamacite, troilite, merrillite, low-Ti chromite and minor taenite. Most chondrules have glassy matrices but some are plagioclase-bearing.

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).

Specimens: 23.5 g including one polished thin section at UWB; remainder with Mr. M. Arjdal.

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Mali
Date:	P 2020 Apr
Mass (g):	230
Pieces:	1
Class:	L4
Shock stage:	S2
Weathering grade:	W0/1
Fayalite (mol%):	25.3±0.2
Ferrosilite (mol%):	21.4±0.3
Wollastonite (mol%):	1.0±0.1
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	23.5
Type spec location:	UWB
Main mass:	M. Arjdal
Comments:	Work name Arj ZM 742; 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. 111, in preparation (2022)

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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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