Meteoritical Bulletin: Entry for Northwest Africa 13958

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Northwest Africa 13958

Basic information

Name: Northwest Africa 13958
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13958
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 15 kg

Classification
history:

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

Writeup from MB 110:

Northwest Africa 13958 (NWA 13958)

(Northwest Africa)

Purchased: 2019 Oct

Classification: Primitive achondrite (Winonaite)

History: Purchased by Aziz Zad in October 2019 from a dealer in Ouargla, Algeria.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Triple grain junction texture (mean grainsize ~0.2 mm). Aggregate of forsterite, enstatite, diopside and plagioclase with accessory kamacite, taenite and troilite.

Geochemistry: Forsterite (Fa_3.4-3.9, FeO/MnO = 18-19, N = 4), enstatite (Fs_4.4-4.7Wo_1.8-2.0, FeO/MnO = 11-13, N = 4), diopside (Fs_1.0-1.9Wo_44.4-45.7, FeO/MnO = 7-10, N = 4), plagioclase (An_21.3-21.9Or_2.5-3.3, N = 3).

Classification: Winonaite.

Specimens: 40 g including one polished thin section at UWB; remainder held jointly by WangZ and Mr. A. Zad.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Ouargla
Date:	P 2019 Oct
Mass (g):	15000
Pieces:	many
Class:	Winonaite
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	3.4-3.9
Ferrosilite (mol%):	4.4-4.7; 1.0-1.9
Wollastonite (mol%):	1.8-2.0; 44.4-45.7
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	39.8
Type spec location:	UWB
Main mass:	WangZ/A. Zad
Comments:	Work name WZY-19; 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)

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Geography:

Coordinates:

Unknown.

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

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