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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:help 789 g
Recommended:  LL3    [explanation]

This is 1 of 409 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 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 (Fa23.5±8.7, range Fa0.9-33.3, N = 13; Cr2O3 in ferroan olivine 0.01-0.29 wt.%, mean 0.13±0.11 wt.%, N = 12), low-Ca pyroxene (Fs17.8±6.8Wo1.4±1.3, range Fs7.3-24.2Wo0.3-3.6, 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:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Jul
Mass (g):789
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
   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)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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