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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 70 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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
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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 8025 approved meteorites from (Northwest Africa) (plus 1951 unapproved names)

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