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Northwest Africa 14490
Basic information Name: Northwest Africa 14490
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14490
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 223 g
Recommended:  LL3    [explanation]

This is 1 of 387 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 23 Nov 2021
Writeup from MB 110:

Northwest Africa 14490 (NWA 14490)

(Northwest Africa)

Purchased: 2021 Jul

Classification: Ordinary chondrite (LL3)

History: Purchased by Shun-Chung Yang in July 2021 from a dealer in Tindouf, Algeria.

Petrography: (A. Irving, UWS and J. Boesenberg, Brown U.) Well-formed chondrules (apparent diameter 940±570 µm, N = 25) are set in a fine grained matrix (~15 vol.%, red-brown in thin section) containing extensively altered kamacite, troilite and chromite, plus some secondary barite and calcite.

Geochemistry: Olivine (Fa22.5±11.2, range Fa3.0-40.8, N = 11; Cr2O3 in ferroan olivine 0.03-0.12 wt.%, mean 0.07±0.03 wt.%, N = 10), low-Ca pyroxene (Fs20.9±13.9Wo1.0±0.8, range Fs2.0-34.8Wo0.34-2.3, N = 5), pigeonite (Fs6.1Wo10.6). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.33.

Classification: Ordinary chondrite (LL3).

Specimens: 21 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang.

Data from:
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:P 2021 Jul
Mass (g):223
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):22.5±11.2
Ferrosilite (mol%):20.9±13.9
Wollastonite (mol%):1.0±0.8
Magnetic suscept.:3.33
Classifier:A. Irving, UWS, and J. Boesenberg, Brown U.
Type spec mass (g):21.0
Type spec location:UWB
Main mass:S.-C. Yang
Comments:Work name SCY-45; 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)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 8136 approved meteorites from (Northwest Africa) (plus 1942 unapproved names)

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