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Northwest Africa 6926
Basic information Name: Northwest Africa 6926
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6926
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 220 g
Meteoritical Bulletin:  MB 100  (2012)  Achondrite-ung 
Recommended:  Achondrite-ung    [explanation]

This is 1 of 140 approved meteorites classified as Achondrite-ung.   [show all]
Search for other: Achondrites, Ungrouped achondrites
Comments: Approved 31 Jan 2012
Writeup from MB 100:

Northwest Africa 6926 (NWA 6926)

(Northwest Africa)

Purchased: Jan 2011

Classification: Ungrouped achondrite

History: Purchased in 2011 January by Gary Fujihara from a Moroccan dealer in Zagora.

Physical characteristics: Multiple small fragments (total weight 220 g) of coarse grained, yellowish-green stones (some with thin partial coatings of pale orange clay-like material).

Petrography: Very fresh specimen with cumulate igneous texture. Large oikocrysts of orthopyroxene enclose chadacrysts of olivine and chromite, with interstitial albitic plagioclase and small grains of very Ni-rich metal (awaruite). Trains of tiny fluid-like bubbles are present especially in orthopyroxene.

Geochemistry: Orthopyroxene Fs41.4-41.7Wo3.7 (Fe/Mn=80-87), olivine Fa51.8-51.9 (Fe/Mn=141-156; NiO=0.74 wt.%).

Classification: Ungrouped achondrite. This material is essentially identical to NWA 6693 and NWA 6704, and likely represents a portion of one of those two large stones (probably NWA 6704, since its reassembled mass was not complete).

Specimens: A total of 20 g of material and one polished thin section is on deposit at UWS. Mr. G. Fujihara holds the main mass.

Data from:
  Table 1
  Line 1542:
Place of purchase:Zagora
Date:P Jan 2011
Mass (g):220
Shock stage:low
Weathering grade:very low
Fayalite (mol%):51.8-51.9
Ferrosilite (mol%):41.4-41.7
Wollastonite (mol%):3.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20
Type spec location:UWS
Main mass:G. Fujihara
Comments: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)
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Aeroliths Collection Theodossiou   
Andreas Grünemeyer   
Anthony James      
Christophe PICQ   
Gerald Armstrong   
Jean-Michel Masson      

     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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