Meteoritical Bulletin: Entry for Northwest Africa 8260

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Northwest Africa 8260

Basic information

Name: Northwest Africa 8260
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8260
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass: 374 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	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 28 Oct 2015

Writeup

help

Writeup from MB 104:

Northwest Africa 8260 (NWA 8260)

(Northwest Africa)

Purchased: 2013 Dec

Classification: Ordinary chondrite (LL3)

History: Purchased by Sergey Vasiliev in December 2013 from a dealer in Zagora, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, medium-sized (0.5-3 mm, mean 1.7±1.0 mm) chondrules in a dark matrix containing altered metal. Minerals are olivine, orthopyroxene), subcalcic augite, sodic plagioclase, chromite, altered kamacite and troilite.

Geochemistry: Olivine (Fa_2.2-50.4, N = 9; Cr₂O₃ in ferroan examples is 0.06-0.15 wt.%, mean 0.09±0.03 wt.%, N = 7), orthopyroxene (Fs_0.8-15.7Wo_0.6-4.9, N = 3), subcalcic augite (Fs_6.8-12.1Wo_31.6-34.9).

Classification: Ordinary chondrite LL3. Estimation of subtype 3.4 based on histograms of Cr₂O₃ distribution in ferroan olivine given in Fig. 4 of Grossman and Brearley (2005).

Specimens: 21 g including one polished thin section at UWB. The remainder is held by S. Vasiliev.

Bibliography:

Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Zagora
Date:	P 2013 Dec
Mass (g):	374
Pieces:	1
Class:	LL3
Shock stage:	S2
Weathering grade:	W2
Fayalite (mol%):	2.2-50.4
Ferrosilite (mol%):	0.8-15.7
Wollastonite (mol%):	0.6-4.9
Magnetic suscept.:	3.51
Classifier:	A. Irving and S. Kuehner, UWS
Type spec mass (g):	21
Type spec location:	UWB
Main mass:	S. Vasiliev
Comments:	SV16; 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)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full

Find references in NASA ADS:
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Photos:

Credit	Photos
Photos from the Encyclopedia of Meteorites:
Sergey Vasiliev
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Piotr gural100

Geography:

Coordinates:

Unknown.

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

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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