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Northwest Africa 14438
Basic information Name: Northwest Africa 14438
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14438
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 190 g
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Winonaite
Recommended:  Winonaite    [explanation]

This is 1 of 87 approved meteorites classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 19 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14438 (NWA 14438)

(Northwest Africa)

Purchased: 2021 Aug

Classification: Primitive achondrite (Winonaite)

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

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Protogranular assemblage (mean grainsize ~0.3 mm) of predominantly forsterite and enstatite with subordinate diopside and sodic plagioclase, plus accessory kamacite, taenite, chromite and apatite (both F-rich and Cl-rich varieties). The mafic silicates in this specimen are more ferroan than in other recently-classified winonaites, and the compositions of the halogen-bearing phosphates differ as well.

Geochemistry: Forsterite (Fa6.4-9.2, FeO/MnO = 12-15, N = 4), enstatite (Fs8.8-9.6Wo1.5-2.3, FeO/MnO = 10, N = 4), diopside (Fs4.4±0.0Wo44.5-44.8, FeO/MnO = 8-9, N = 2), plagioclase (Ab80.8-81.4An15.1-15.0Or4.1-3.6, N = 2).

Classification: Winonaite.

Specimens: 20.7 g including a polished endcut and one polished thin section at UWB; remainder with Mr. S.-C. Yang.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Guelmim
Date:P 2021 Aug
Mass (g):190
Pieces:1
Class:Winonaite
Shock stage:low
Weathering grade:low
Fayalite (mol%):6.4-8.2
Ferrosilite (mol%):8.8-9.6; 4.4±0.0
Wollastonite (mol%):1.5-2.3; 44.5-44.8
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.7
Type spec location:UWB
Main mass:S.-C. Yang and J. Chen
Comments:Work name SCY-49; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
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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Geography: 
Coordinates:Unknown.

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