Meteoritical Bulletin: Entry for Northwest Africa 7669

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Northwest Africa 7669

Basic information

Name: Northwest Africa 7669
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7669
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass: 176 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	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 8 Nov 2014

Writeup

Writeup from MB 103:

Northwest Africa 7669 (NWA 7669)

(Northwest Africa)

Purchased: 2012 Dec

Classification: Ordinary chondrite (LL3)

History: Purchased by A. Aaronson in Temara, Morocco, in December 2012.

Petrography: (A. Irving and S. Kuehner, UWS) Well-developed, relatively large and closely packed chondrules. Olivine, orthopyroxene, subcalcic augite, augite, sodic plagioclase, chromite, kamacite and troilite. Chondrules are 0.5-3.0 mm, mean 2 mm, in diameter.

Geochemistry: Olivine (Fa_0.6-52.0; Cr₂O₃ in ferroan olivine = 0.03-0.27 wt.%, mean = 0.10 wt.%, sd = 0.09 wt.% , N = 7), orthopyroxene (Fs_0.9-9.4Wo_0.8-0.4, N = 3), subcalcic augite (Fs_17.9Wo_25.8), augite (Fs_16.6Wo_44.4).

Classification: Ordinary chondrite (LL3).

Specimens: A total of 20.2 g of material and one polished thin section are on deposit at UWB. Aaronson holds the main mass.

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Temara
Date:	P 2012 Dec
Mass (g):	176
Pieces:	1
Class:	LL3
Shock stage:	S2
Weathering grade:	W1/2
Fayalite (mol%):	0.6-52.0
Ferrosilite (mol%):	0.9-9.4
Wollastonite (mol%):	0.8-0.4
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.2
Type spec location:	UWB
Main mass:	Aaronson
Comments:	M1462; 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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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