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Northwest Africa 7673
Basic information Name: Northwest Africa 7673
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7673
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 189 g
Meteoritical Bulletin:  MB 103  (2014)  L3
Recommended:  L3    [explanation]

This is 1 of 734 approved meteorites (plus 1 unapproved name) classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 8 Nov 2014
Writeup from MB 103:

Northwest Africa 7673 (NWA 7673)

(Northwest Africa)

Purchased: 2012 Dec

Classification: Ordinary chondrite (L3)

History: Purchased by Adam Aaronson in Temara, Morocco, in December 2012.

Petrography: (A. Irving and S. Kuehner, UWS) Well developed, closely packed, medium-sized chondrules. Olivine, orthopyroxene, subcalcic augite, augite, sodic plagioclase, chromite, altered kamacite and troilite. Chondrule diameters are 0.4-2.6 mm, mean 1.8 mm.

Geochemistry: Olivine (Fa16.2-28.9); mean Cr2O3 in ferroan olivine = 0.02 wt.%, sd = 0.02 wt.%, N = 7), orthopyroxene (Fs5.5-15.3Wo0.3-3.2, N = 3), subcalcic augite (Fs13.6Wo35.9), augite (Fs3.4-5.3Wo40.1-44.0). The maximum Fa is only 28.9, so this is not an LL (despite the the presence of some large chondrules).

Classification: Ordinary chondrite (L3).

Specimens: A total of 20.6 g of material and one polished thin section are on deposit at UWB. Aaronson holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2012 Dec
Mass (g):189
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):16.2-28.9
Ferrosilite (mol%):5.5-15.3
Wollastonite (mol%):0.3-3.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.6
Type spec location:UWB
Main mass:Aaronson
Comments:M1468; submitted by A. Irving
   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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
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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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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