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Northwest Africa 10961
Basic information Name: Northwest Africa 10961
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10961
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 2.22 kg
Meteoritical Bulletin:  MB 106  (2018)  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 13 Jan 2017
Writeup from MB 106:

Northwest Africa 10961 (NWA 10961)

(Northwest Africa)

Purchased: 2016 Sep

Classification: Martian meteorite (Shergottite)

History: Purchased by Ben Hoefnagels in September 2016 from a dealer in Taliouine, Morocco.

Physical characteristics: A single mass (2220 g) with a brown, weathered exterior. The fresh interior is mostly pale green with small dark brown patches and black grains visible.

Petrography: (A. Irving and S. Kuehner, UWS) Poikilitic texture. Large, twinned, essentially unzoned pyroxene oikocrysts (with undulose extinction) enclose chadacrysts of olivine (some brownish in thin section) and Cr-rich chromite. Very sparse maskelynite (~2 vol.%) occurs as interstitial grains. Other accessory minerals are Ti-bearing chomite, ilmenite and rare Mg-merrillite. Pockets of dark, quenched shock glass are present.

Geochemistry: Olivine (Fa29.5-31.2, FeO/MnO = 41-46, N = 3), orthopyroxene (Fs19.4-20.7Wo2.7-3.6, FeO/MnO = 20-28, N = 3), augite (Fs13.0-13.8Wo38.2-35.0, FeO/MnO = 22-24, N = 2), maskelynite (An53.8-55.6Or1.1-1.0, N = 2).

Classification: Martian meteorite (shergottite, poikilitic, ultramafic).

Specimens: 22 g including two polished thin sections at PSF; remainder with Mr. B. Hoefnagels.

Data from:
  Table 0
  Line 0:
Place of purchase:Taliouine
Date:P 2016 Sep
Mass (g):2220
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Fayalite (mol%):29.5-31.2
Ferrosilite (mol%):19.4-20.7; 13.0-13.8
Wollastonite (mol%):2.7-3.6; 38.2-35.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22
Type spec location:UWB
Main mass:B. Hoefnagels
Comments:BH009; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
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)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 9370 approved meteorites from (Northwest Africa) (plus 1875 unapproved names)

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