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Northwest Africa 6710
Basic information Name: Northwest Africa 6710
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6710
Observed fall: No
Year found: 2011
Country: Mali
Mass:help 74.4 g
Meteoritical Bulletin:  MB 99  (2011)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 300 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 18 May 2011
Writeup from MB 99:

Northwest Africa 6710 (NWA 6710)


Purchased: 2011 March

Classification: Martian meteorite (Shergottite)

History: A stone found in Mali was purchased in March 2011 by Stefan Ralew from a Moroccan dealer in Erfoud.

Physical characteristics: Fine grained, partly fusion-crusted and partly abraded stone (74.4 g). Fresh interior is pale gray with pale tan grains, and thin, black glassy shock veins.

Petrography: (A. Irving and S. Kuehner, UWS) Porphyritic texture, with small (to 0.4 mm) olivine phenocrysts set in a finer grained groundmass dominated by prismatically zoned clinopyroxene and maskelynite with accessory ferroan olivine, chromite, ilmenite, titanomagnetite, merrillite, and pyrrhotite.

Geochemistry: Olivine phenocrysts (core Fa27.5-31.0, rim Fa40.6; FeO/MnO=51-54), pigeonite (Fs30.1-34.0Wo6.2-10.3, FeO/MnO=31-33), augite (Fs25.4Wo29.4, FeO/MnO=27), groundmass olivine (Fa46.1, FeO/MnO=54), plagioclase (An52.1-54.6Or1.9-2.2).

Classification: Achondrite (Martian, olivine-phyric shergottite). Identical to paired stones NWA 2990, NWA 5960 and NWA 6234 in terms of grain size, texture, and mineral compositions.

Specimens: A total of 15.0 g of type material and one polished thin section are on deposit at UWS. The remaining material is held by Ralew.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2011 March
Mass (g):74.4
Class:Martian (shergottite)
Shock stage:moderate
Weathering grade:low
Fayalite (mol%):27.5-46.1
Ferrosilite (mol%):30.1-34.0; 25.4
Wollastonite (mol%):6.2-10.3; 29.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):15
Type spec location:UWS
Main mass:S. Ralew
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)
Ralew: Stefan Ralew, Kunibertstra├če 29, 12524 Berlin, Germany; Website (private address)
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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     This is 1 of 100 approved meteorites from Mali (plus 2 unapproved names)

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