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Northwest Africa 13986
Basic information Name: Northwest Africa 13986
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13986
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 1845 g
Recommended:  Winonaite    [explanation]

This is 1 of 74 approved meteorites classified as Winonaite.   [show all]
Search for other: Primitive achondrites, Winonaites
Comments: Approved 21 Jun 2021
Writeup from MB 110:

Northwest Africa 13986 (NWA 13986)

(Northwest Africa)

Purchased: 2020 Dec

Classification: Primitive achondrite (Winonaite)

History: Purchased by Ziyao Wang in December 2020 from a dealer in Agadir, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Triple grain junction texture (mean grainsize ~0.25 mm). Aggregate of forsterite, enstatite, diopside and plagioclase with accessory troilite, taenite, kamacite, daubreelite, alabandite and rare fluoroedenite.

Geochemistry: Forsterite (Fa0.3-0.4, FeO/MnO = 5-6, N = 4), enstatite (Fs0.2-0.6Wo1.4-1.7, FeO/MnO = 5, N = 4), diopside (Fs0.2-0.3Wo46.3-46.8, FeO/MnO = 5, N = 3), plagioclase (An30.3Or1.5), fluoredenite (Na2O = 4.1 wt.%, F = 4.3 wt.%).

Classification: Winonaite. This specimen is mineralogically different from winonaite NWA 13958 and many other recently classified winonaite specimens in being significantly more magnesian and also in containing minor F-bearing amphibole.

Specimens: 27 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2020 Dec
Mass (g):1845
Shock stage:low
Weathering grade:low
Fayalite (mol%):0.3-0.4
Ferrosilite (mol%):0.2-0.6; 0.2-0.3
Wollastonite (mol%):1.4-1.7; 46.3-46.8
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):27
Type spec location:UWB
Main mass:WangZ
Comments:Work name WZY-22; 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)
WangZ: Ziyao Wang, Hebei GEO University North Campus, Huai An dong road 127, Shijiazhuang, Hebei Province , China (private address; updated 25 Jun 2021)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ziyao Wang            

     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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