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Northwest Africa 6479
Basic information Name: Northwest Africa 6479
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6479
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 450 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL3.5
Recommended:  LL3.5    [explanation]

This is 1 of 22 approved meteorites classified as LL3.5.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 6 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 6479 (NWA 6479)

Northwest Africa

Purchased: 2010 Nov

Classification: Ordinary chondrite (LL3.5)

Petrography: (A. Irving and S. Kuehner, UWS) Large (to 1.1 mm), well-formed chondrules and sparse black inclusions (very fine grained) in a finer grained matrix. Minerals are olivine, orthopyroxene, subcalcic augite, augite, sodic plagioclase, chromite, altered kamacite and troilite. One grain of gehlenite (possibly derived from a CAI) was found.

Geochemistry: Olivine (Fa1.0-59.0; Cr2O3 in ferroan olivine = 0.06-0.11 wt.%, mean 0.10, s.d. 0.02, N = 7), orthopyroxene (Fs2.5-24.0Wo0.2-2.4), subcalcic augite (Fs13.1Wo37.4), augite (Fs9.1Wo45.7).

Classification: Ordinary chondrite (LL3.5). Subtype estimated to be 3.5 based on Cr2O3 range in ferroan olivine. Estimation of subtype based on histograms (Fig. 4) in Grossman and Brearley (2005).

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:
  MB102
  Table 0
  Line 0:
Place of purchase:Taliouine
Date:P 2010 Nov
Mass (g):450
Pieces:1
Class:LL3.5
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):1.0-59.0, n=9
Ferrosilite (mol%):2.5-24.0
Wollastonite (mol%):0.2-2.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.7
Type spec location:UWB
Main mass:J. Schrader
Comments:JS10-7; 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. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7354 approved meteorites from (Northwest Africa) (plus 1958 unapproved names)

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