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Northwest Africa 6910
Basic information Name: Northwest Africa 6910
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6910
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 390 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L3.3
Recommended:  L3.3    [explanation]

This is 1 of 18 approved meteorites classified as L3.3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 6 Sep 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 6910 (NWA 6910)

Northwest Africa

Purchased: 2009 Sep

Classification: Ordinary chondrite (L3.3)

Petrography: (A. Irving and S. Kuehner, UWS) Well formed, fairly large (to 0.7 mm) closely packed chondrules in a very dark matrix containing a moderate amount of metal. Minerals are olivine, orthopyroxene, augite, subcalcic augite, sodic plagioclase, chromite, partly altered kamacite, troilite and taenite.

Geochemistry: Olivine (Fa0.4-39.2; Cr2O3 in ferroan olivine = 0.02-0.33 wt.%, mean 0.12 wt.%, s.d. 0.12, N = 9), orthopyroxene (Fs1.2-7.4Wo0.5-0.6), augite (Fs6.4Wo36.1), subcalcic augite (Fs21.0Wo29.5). log χ (× 10-9 m3/kg) = 4.93.

Classification: Ordinary chondrite (L3.3). Subtype estimated to be 3.3 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:Denver
Date:P 2009 Sep
Mass (g):390
Pieces:1
Class:L3.3
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):0.4-39.2, n=11
Ferrosilite (mol%):1.2-7.4
Wollastonite (mol%):0.5-0.6
Magnetic suscept.:4.93
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21
Type spec location:UWB
Main mass:E. Twelker
Comments:ET-M09; 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)
Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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)
Mirko Graul   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6984 approved meteorites from (Northwest Africa) (plus 2008 unapproved names)

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