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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
Classification
  history:
Recommended:  H4-an    [explanation]

This is 1 of 23 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
Writeuphelp
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:
  MB110
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2021 Aug
Mass (g):583
Pieces:1
Class:H4-an
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
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, 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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