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Northwest Africa 14487
Basic information Name: Northwest Africa 14487
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14487
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 3.2 kg
Recommended:  Eucrite-br    [explanation]

This is 1 of 199 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 23 Nov 2021
Writeup from MB 110:

Northwest Africa 14487 (NWA 14487)

(Northwest Africa)

Purchased: 2021 Jun

Classification: HED achondrite (Eucrite, brecciated)

History: Purchased by Eric Twelker in June 2021 from a dealer in Agadir, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed predominantly of angular mineral debris from eucrite lithologies accompanied by sparse microgabbroic and fine-grained lithic eucrite clasts in a fine grained matrix. The fine grained lithic eucrite clasts have intergranular textures but range in grainsize from ~100 µm to ~200 µm, and some are plagioclase-phyric. Minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, ilmenite, baddeleyite, troilite and Ni-poor Fe metal.

Geochemistry: Low-Ca pyroxene hosts (Fs65.2-65.9Wo1.7-2.3, FeO/MnO = 32-34, N = 3), augite exsolution lamellae (Fs29.2-33.9Wo42.1-38.6, FeO/MnO = 31-33, N = 4), plagioclase (An88.1-90.2Or0.4-0.3, N = 4).

Classification: Eucrite (breccia).

Specimens: 23.4 g including one polished thin section at UWB; remainder with Twelker.

Data from:
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2021 Jun
Mass (g):3200
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):65.2-65.9; 29.2-33.9
Wollastonite (mol%):1.7-2.3; 42.3-38.6
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):23.4
Type spec location:UWB
Main mass:E. Twelker
Comments:Work name ET21-5; 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)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 8037 approved meteorites from (Northwest Africa) (plus 1947 unapproved names)

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