Meteoritical Bulletin: Entry for Northwest Africa 13108

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Northwest Africa 13108

Basic information

Name: Northwest Africa 13108
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13108
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 860 g

Classification
history:

Meteoritical Bulletin:	MB 109	(2020)	EL6
Recommended:			EL6 [explanation]

This is 1 of 133 approved meteorites classified as EL6. [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites

Comments:

Approved 9 Feb 2020

Writeup

help

Writeup from MB 109:

Northwest Africa 13108 (NWA 13108)

(Northwest Africa)

Purchased: 2019 Mar

Classification: Enstatite chondrite (EL6)

History: Purchased in Zagora, Morocco, by Jaouad Achouri in March 2019.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Mostly recrystallized aggregate of enstatite, sodic plagioclase and partially altered opaque phases (brown in thin section). Rare recrystallized RP chondrules were observed. Careful analysis of accessory phases identified daubreelite (partially altered to jarosite), altered troilite, Cu-bearing violarite, Ni-free Fe silicide (possibly naquite) and rare oldhamite. Most of the relatively sparse primary metal has been completely replaced by iron hydroxides, but a few grains of taenite and Si-poor kamacite were observed.

Geochemistry: Enstatite (Fs_0.1±0.0Wo_1.4±0.0, N = 2), plagioclase (Ab_78.6±0.5An_16.8±0.1Or_4.6±0.3, N = 2), kamacite (Si = 1.3±0.7 wt.%, Ni = 4.2±1.6 wt.%, N = 4).

Classification: Enstatite chondrite (EL6).

Specimens: 23.6 g including one polished thin section at UWB; remainder with Mr. J. Achouri.

Data from:
  MB109
  Table 0
  Line 0:

Place of purchase:	Zagora
Date:	P 2019 Mar
Mass (g):	860
Pieces:	1
Class:	EL6
Shock stage:	S2
Weathering grade:	W3
Ferrosilite (mol%):	0.1±0.0
Wollastonite (mol%):	1.4±0.0
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	23.6
Type spec location:	UWB
Main mass:	J. Achouri
Comments:	Work name JAch S5; 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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 109, in preparation (2020)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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