Meteoritical Bulletin: Entry for Northwest Africa 12945

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Northwest Africa 12945

Basic information

Name: Northwest Africa 12945
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12945
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 554 g

Classification
history:

Meteoritical Bulletin:	MB 108	(2020)	EH6
Recommended:			EH6 [explanation]

This is 1 of 12 approved meteorites classified as EH6. [show all]
Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites

Comments:

Approved 7 Nov 2019

Writeup

Writeup from MB 108:

Northwest Africa 12945 (NWA 12945)

(Northwest Africa)

Purchased: 2019 Sep

Classification: Enstatite chondrite (EH6)

History: Purchased by Fabien Kuntz in September 2019 from a dealer in Zagora, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Recrystallized aggregate of enstatite and subordinate sodic feldspar with accessory altered kamacite, troilite (some Cr- and Mn-bearing), niningerite and schreibersite. No chondrules are apparent.

Geochemistry: Enstatite (Fs_1.3±0.8Wo_1.5±0.1(range Fs_0.4-2.4Wo_1.4-1.6, N = 3), plagioclase (Ab_80.6-82.2An_14.0-14.6Or_3.8-4.7, N = 3), kamacite (Si = 2.6-3.3 wt.%).

Classification: Enstatite chondrite (EH6).

Specimens: 22.54 g including one polished thin section at UWB; remainder with Kuntz.

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Zagora
Date:	P 2019 Sep
Mass (g):	554
Pieces:	1
Class:	EH6
Shock stage:	low
Weathering grade:	W2
Ferrosilite (mol%):	1.3±0.8
Wollastonite (mol%):	1.5±0.1
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	22.54
Type spec location:	UWB
Main mass:	F. Kuntz
Comments:	Work names ZS-A3 and K439; 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)
Kuntz: Fabien Kuntz, France; Website (private address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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