Meteoritical Bulletin: Entry for Northwest Africa 8668

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Northwest Africa 8668

Basic information

Name: Northwest Africa 8668
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8668
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass: 166.3 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	Lunar (feldsp. breccia)
Recommended:			Lunar (feldsp. breccia) [explanation]

This is 1 of 336 approved meteorites classified as Lunar (feldsp. breccia). [show all]
Search for other: Lunar meteorites

Comments:

Approved 12 Dec 2014

Writeup

help

Writeup from MB 103:

Northwest Africa 8668 (NWA 8668)

(Northwest Africa)

Purchased: 2014 Jun

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Fabien Kuntz in June 2014 from a dealer in Ouarzazate, Morocco.

Physical characteristics: Dark gray, mottled stone (166.3 g) with some larger light gray clasts and interstital black regions.

Petrography: (A. Irving and S. Kuehner, UWS) Relatively fine grained fragmental breccia composed of mineral clasts of anorthite, olivine and pigeonite, with accessory merrillite, Mg-ilmenite, Ti-rich chromite, kamacite, Cr-Mg-Zr-Fe titanate, baddeleyite, and rare troilite and barite.

Geochemistry: Olivine (Fa_27.0-29.7, FeO/MnO = 81-83, N = 3), pigeonite (Fs_22.5-47.8Wo_9.8-12.5, FeO/MnO = 55-69, N = 3), plagioclase (An_91.4-96.0Or_1.1-0.3, N = 2). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances (in wt.%) FeO 5.7, Na₂O 0.49; (in ppm) Sc 9.4, Ni 460, La 14.5, Sm 6.5, Eu 1.31, Yb 4.4, Lu 0.60, Hf 5.1, Th 2.1.

Classification: Lunar (feldspathic breccia). Close similarities in texture, mineralogy and bulk composition suggest that this specimen is paired with NWA 8455.

Specimens: 20.3 g including one polished endcut at UWB; main mass with Kuntz.

Data from:
  MB103
  Table 0
  Line 0:

Place of purchase:	Ouarzazate
Date:	P 2014 Jun
Mass (g):	166.3
Pieces:	1
Class:	Lunar (feldsp. breccia)
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	27.0-29.7
Wollastonite (mol%):	9.8-12.5
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	20.3
Type spec location:	UWB
Main mass:	F. Kuntz
Comments:	K228; 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. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Allmeteorite.com
Antonello Petriccione
Denis gourgues
Franco Vignato

Geography:

Coordinates:

Unknown.

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

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Revision
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