Meteoritical Bulletin: Entry for Northwest Africa 14586

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Northwest Africa 14586

Basic information

Name: Northwest Africa 14586
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14586
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass: 789 g

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	LL3
Recommended:			LL3 [explanation]

This is 1 of 487 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 Jan 2022

Writeup

help

Writeup from MB 111:

Northwest Africa 14586 (NWA 14586)

(Northwest Africa)

Purchased: 2021 Jul

Classification: Ordinary chondrite (LL3)

History: Purchased by Matthew Stream in July 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed unequilibrated chondrules containing devitrified glass (apparent diameter 870±460 µm, N = 25; excluding one 6 mm cryptocrystalline, partially broken chondrule in the studied thin section) are set in a fine grained matrix containing altered kamacite, chromite, troilite and minor secondary barite.

Geochemistry: Olivine (Fa_23.5±8.7, range Fa_0.9-33.3, N = 13; Cr₂O₃ in ferroan olivine 0.01-0.29 wt.%, mean 0.13±0.11 wt.%, N = 12), low-Ca pyroxene (Fs_17.8±6.8Wo_1.4±1.3, range Fs_7.3-24.2Wo_0.3-3.6, N = 5). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 3.91.

Classification: Ordinary chondrite (LL3).

Specimens: 32.8 g including one polished thin section at UWB; remainder with Mr. M. Stream.

Data from:
  MB111
  Table 0
  Line 0:

Place of purchase:	Algeria
Date:	P 2021 Jul
Mass (g):	789
Pieces:	4
Class:	LL3
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	23.8±8.5
Ferrosilite (mol%):	17.8±6.8
Wollastonite (mol%):	1.4±1.3
Magnetic suscept.:	3.91
Classifier:	A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):	32.8
Type spec location:	UWB
Main mass:	M. Stream
Comments:	Work name MS21-2; 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)
BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024)

Catalogs:

References:

Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Robert Smart
Ryan Upchurch

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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