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Northwest Africa 14558
Basic information Name: Northwest Africa 14558
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14558
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1447 g
Recommended:  Winonaite    [explanation]

This is 1 of 74 approved meteorites classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 25 May 2022
Writeup from MB 111:

Northwest Africa 14558 (NWA 14558)

(Northwest Africa)

Purchased: 2021 Jun

Classification: Primitive achondrite (Winonaite)

History: Purchased by Jason Whitcomb in June 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Triple grain junction texture (mean grainsize ~200 ┬Ám). Composed of forsterite, enstatite, diopside, and kamacite (some altered) together with accessory sodic plagioclase, fluoroedenite amphibole, taenite, schreibersite, troilite and graphite.

Geochemistry: Forsterite (Fa3.5-3.9, FeO/MnO = 18-23, N = 4), enstatite (Fs4.2-4.4Wo1.6-1.9, FeO/MnO = 13-15, N = 4), diopside (Fs1.1-1.7Wo44.5-45.3, FeO/MnO =10-18, N = 4), plagioclase (Ab75.6An21.1Or3.2).

Classification: Winonaite.

Specimens: 32.7 g in the form of a polished endcut at PSF; remainder with Mr. J. Whitcomb.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Jun
Mass (g):1447
Shock stage:low
Weathering grade:low
Fayalite (mol%):3.5-3.9
Ferrosilite (mol%):4.2-4.4; 1.1-.7
Wollastonite (mol%):1.6-1.9; 44.5-45.3
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):32.7
Type spec location:PSF
Main mass:J. Whitcomb
Comments:Work name JW-75; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
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)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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