Meteoritical Bulletin: Entry for Northwest Africa 13927

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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: 98 g

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	Aubrite
Recommended:			Aubrite [explanation]

This is 1 of 83 approved meteorites classified as Aubrite. [show all]
Search for other: Achondrites, Aubrites, Enstatite achondrites, and Enstatite-rich meteorites

Comments:

Approved 29 May 2021

Writeup

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 (Fs_0.1-0.6Wo_0.6-0.8, N = 6), plagioclase (Ab_69.0-84.1An_28.9-5.6Or_2.2-9.5, 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
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:

Credit	Photos
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 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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Revision
history:

This lists important revisions made to data for this record.

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