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Northwest Africa 14584
Basic information Name: Northwest Africa 14584
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14584
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 39 g
Recommended:  Acapulcoite    [explanation]

This is 1 of 87 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Comments: Approved 19 Mar 2022
Writeup from MB 111:

Northwest Africa 14584 (NWA 14584)

(Northwest Africa)

Purchased: 2021 Jun

Classification: Primitive achondrite (Acapulcoite)

History: Purchased by Shun-Chung Yang and Juan Chen in June 2021 from a dealer in Tindouf, Algeria.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Triple grain junction texture, mean grainsize 280 ┬Ám. Composed predominantly of olivine and orthopyroxene with subordinate diopside, sodic plagioclase, kamacite, troilite and low-Ti chromite.

Geochemistry: Olivine (Fa12.5-12.9, FeO/MnO = 23-24, N = 3), low-Ca pyroxene (Fs12.6-12.7Wo1.8-2.9, FeO/MnO = 16, N = 3), diopside (Fs5.0-5.5Wo44.5-43.5, FeO/MnO = 10-11, N = 3), plagioclase (Ab76.7An20.8Or2.6).

Classification: Acapulcoite.

Specimens: 8.66 g in the form of a polished endcut at UWB; remainder with Mr. S.-C. Yang and Mr. J. Chen.

Data from:
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:P 2021 Jun
Mass (g):39
Shock stage:low
Weathering grade:low
Fayalite (mol%):12.5-12.9
Ferrosilite (mol%):12.6-12.7; 5.0-5.5
Wollastonite (mol%):1.8-2.9; 44.5-43.5
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):8.60
Type spec location:UWB
Main mass:S.-C. Yang and J. Chen
Comments:Work name SCY-37; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 8580 approved meteorites from (Northwest Africa) (plus 1884 unapproved names)

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