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Northwest Africa 11043
Basic information Name: Northwest Africa 11043
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11043
Observed fall: No
Year found: 2016
Country: Mauritania
Mass:help 544 g
Meteoritical Bulletin:  MB 106  (2018)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 284 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 7 Feb 2017
Writeup from MB 106:

Northwest Africa 11043 (NWA 11043)


Purchased: 2016

Classification: Martian meteorite (Shergottite)

History: Purchased by Abdelhadi Aithiba in Mauritania, 2016, reportedly found in Mali.

Physical characteristics: One piece, no fusion crust, significant amount of the exterior is covered with light-orange desert soil; some scattered patches of green silicates are exposed. Fresh broken surface reveals medium to coarse grains of predominantly olivine and pyroxene.

Petrography: (C. Agee, UNM) Microprobe examination of polished mount shows approximately 80 % of this sample consisting of poikilitic olivine and pyroxene grains most in the size range 500-1000 μm. Plagioclase appears to have been completely transformed to maskelynite.

Geochemistry: (C. Agee, B. Ha, UNM) olivine Fa36.4±1.2, Fe/Mn=49±1, NiO=0.06±0.02 (wt%), n=7; pigeonite Fs28.2±2.0Wo11.0±2.0, Fe/Mn=28±1, n=9; augite Fs18.3±1.0Wo30.6±2.6, Fe/Mn=25±1, n=13; maskelynite Ab37.6±1.2An60.7±1.3Or1.6±0.2, n=7.

Classification: Martian (shergottite), petrologically equilibrated ultramafic rock, poikilitic shergottite group. No known pairings, but pyroxene and olivine compositions are similar to RBT 04262, NWA 7755, and NWA 8161.

Specimens: 20.5 g, including a probe mount, on deposit at UNM, Abdelhadi Aithiba holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2016
Mass (g):544
Class:Martian (shergottite)
Shock stage:high
Weathering grade:high
Fayalite (mol%):36.4±1.2
Ferrosilite (mol%):28.2±2.0, 18.3±1.0
Wollastonite (mol%):11.0±2.0, 30.6±2.6
Classifier:C. Agee, UNM
Type spec mass (g):20.5
Type spec location:UNM
Main mass:Abdelhadi Aithiba
Comments:Submitted by C. Agee
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
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 184 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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