Meteoritical Bulletin: Entry for Northwest Africa 13868

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Northwest Africa 13868

Basic information

Name: Northwest Africa 13868
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13868
Observed fall: No
Year found: 2020
Country: Algeria
Mass: 880 g

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	LL3
Recommended:			LL3 [explanation]

This is 1 of 487 approved meteorites classified as LL3. [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)

Comments:

Approved 20 Dec 2021

Writeup

help

Writeup from MB 110:

Northwest Africa 13868 (NWA 13868)

Algeria

Purchased: 2020 May

Classification: Ordinary chondrite (LL3)

History: Purchased by John Higgins in May, 2020 from a dealer in Ouarzazate, Morocco.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fairly closely packed, well-formed chondrules (apparent diameter 1030±640 µm, N = 24) are set in a fine grained matrix containing kamacite (almost completely altered to Fe oxide), taenite, troilite and low-Ti chromite.

Geochemistry: Olivine (Fa_27.9±20.8, range Fa_0.6-58.1, N = 9; Cr₂O₃ in ferroan olivine 0.02-0.28 wt.%, mean 0.07 wt.%, sd 0.06 wt.%, N = 14), low-Ca pyroxene (Fs_19.0±9.3Wo_2.7±1.5, range Fs_10.3-31.6Wo_0.8-4.3, N = 4), pigeonite (Fs_32.9Wo_6.2; Fs_32.3Wo_11.6; N = 2), subcalcic augite (Fs_29.0Wo_22.3; Fs_10.5Wo_31.8; N = 2). Magnetic susceptibility log χ (× 10^-9 m³/kg) = 4.22.

Classification: Ordinary chondrite (LL3).

Specimens: 30 g including one polished thin section at UWB; remainder with Mr. J. Higgins.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Ouarzazate
Date:	P 2020 May
Mass (g):	880
Pieces:	1
Class:	LL3
Shock stage:	S2
Weathering grade:	W2/3
Fayalite (mol%):	27.9±20.8
Ferrosilite (mol%):	19.0±9.3
Wollastonite (mol%):	2.7±1.5
Magnetic suscept.:	4.22
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	30
Type spec location:	UWB
Main mass:	J. Higgins
Comments:	Work name JH20-9; 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 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
Public domain photographs:
A. Irving

Geography:

Algeria

Algeria

Coordinates:

Unknown.

Statistics:
This is 1 of 1358 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

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Revision
history:

This lists important revisions made to data for this record.

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