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Northwest Africa 14464
Basic information Name: Northwest Africa 14464
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14464
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 583 g
Recommended:  H4-an    [explanation]

This is 1 of 24 approved meteorites classified as H4-an.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 11 Dec 2021
Writeup from MB 110:

Northwest Africa 14464 (NWA 14464)

(Northwest Africa)

Purchased: 2021 Aug

Classification: Ordinary chondrite (H4, anomalous)

History: Purchased by Shun-Chung Yang and Juan Chen in August 2021 from a Mauritanian dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed, relatively small chondrules containing devitrified glass are set in a fine grained matrix containing altered kamacite, taenite, troilite, chromite, merrillite and chlorapatite.

Geochemistry: Olivine (Fa14.1±1.0, range Fa13.2-16.0, N = 8), low-Ca pyroxene (Fs12.7±0.7Wo0.9±0.5, range Fs12.2-14.0Wo0.4-1.7, N = 5). Magnetic susceptibility log χ (× 10-9 m3/kg) = 5.35.

Classification: Ordinary chondrite (H4-an). In comparison to the great majority of H chondrites, this specimen has unusually magnesian olivine and low-Ca pyroxene compositions, and is very similar in those and other respects to anomalous H4 chondrite NWA 13883.

Specimens: 25.4 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang and Mr. J. Chen.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2021 Aug
Mass (g):583
Shock stage:S2
Weathering grade:W1/2
Fayalite (mol%):14.1±1.0
Ferrosilite (mol%):12.7±0.7
Wollastonite (mol%):0.9±0.5
Magnetic suscept.:5.35
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):25.4
Type spec location:UWB
Main mass:S.-C. Yang and J. Chen
Comments:Work name SCY-46; 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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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     This is 1 of 9370 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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