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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:help 374 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  LL3
Recommended:  LL3    [explanation]

This is 1 of 341 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
Writeuphelp
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 (Fa2.2-50.4, N = 9; Cr2O3 in ferroan examples is 0.06-0.15 wt.%, mean 0.09±0.03 wt.%, N = 7), orthopyroxene (Fs0.8-15.7Wo0.6-4.9, N = 3), subcalcic augite (Fs6.8-12.1Wo31.6-34.9).

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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
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:
CreditPhotos
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 7320 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

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