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Northwest Africa 13927
Basic information Name: Northwest Africa 13927
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13927
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 98 g
Classification
  history:
Recommended:  Aubrite    [explanation]

This is 1 of 78 approved meteorites classified as Aubrite.   [show all]
Search for other: Achondrites, Aubrites, Enstatite achondrites, and Enstatite-rich meteorites
Comments: Approved 29 May 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13927 (NWA 13927)

(Northwest Africa)

Purchased: 2020 Jan

Classification: Enstatite achondrite (Aubrite)

History: Purchased by Ziyao Wang in January 2020 from a dealer in Guelmim, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Relatively equigranular aggregate (mean grainsize ~0.4 mm) of polysynthetically-twinned orthopyroxene with subordinate sodic plagioclase and accessory silica polymorph, altered kamacite, schreibersite and troilite. Secondary iron hydroxides occur along grain boundaries.

Geochemistry: Enstatite (Fs0.1-0.6Wo0.6-0.8, N = 6), plagioclase (Ab69.0-84.1An28.9-5.6Or2.2-9.5, N = 40, kamacite (Ni = 6.5 wt.%, Si = 1.1 wt.%).

Classification: Aubrite.

Specimens: 21.9 g including one polished thin section at UWB; remainder with WangZ.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Guelmim
Date:P 2020 Jan
Mass (g):98
Pieces:1
Class:Aubrite
Shock stage:low
Weathering grade:moderate
Ferrosilite (mol%):0.1-0.6
Wollastonite (mol%):0.6-0.8
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.9
Type spec location:UWB
Main mass:WangZ
Comments:Work name WZY-12; 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, 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)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ziyao Wang               
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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