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Northwest Africa 11410
Basic information Name: Northwest Africa 11410
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11410
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 467 g
Meteoritical Bulletin:  MB 106  (2018)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 605 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 24 Sep 2017
Writeup from MB 106:

Northwest Africa 11410 (NWA 11410)


Purchased: February 2013

Classification: Ureilite

History: Purchased from Moroccan meteorite dealer in 2013.

Physical characteristics: Physical Characteristics: Single large stone, black irregular surface with remnant fusion crust. Saw cut shows dark mosaicized interior with dark green and smaller white grains. Stone was extremely difficult to cut.

Petrography: (K. Domanik and F. Stephan, UAz) Microprobe examination of a polished mount shows approx. 80% olivine and 15% pyroxene. The average grain size of both olivine and pyroxene is approx. 1-2 mm. Fe-Ni veins, now mostly oxidized by desert weathering, occupy grain boundaries and also crosscut some grains. The veins contain irregularly shaped patches of graphite, partially altered to diamond, 200-1000 μm in length. In rare cases olivine grain boundaries in contact with larger metal veins or with graphite display a thin, reduced rim, 2-10 μm wide, containing scattered, tiny metal blebs. Pyroxene consists of a patchy, mottled mixture of pigeonite and low-Ca pyroxene containing abundant void spaces, scattered Fe-metal blebs, and small Si-rich inclusions.

Geochemistry: Mineral compositions and geochemistry: (K. Domanik and F. Stephan, UAz) Olivine cores Fa20.9±1.6, Fe/Mn=44.3±4.4, Cr2O3=0.66±0.07 wt%, n=17; olivine rims Fa3.6±1.4, Fe/Mn=8.6±4.6, Cr2O3=0.57±0.10 wt%, n=8; pigeonite Fs16.4±0.4Wo9.6±1.0, Fe/Mn=24.7±1.9, Cr2O3=1.22±0.07 wt%, n=12; low-Ca pyroxene Fs14.2±0.6Wo2.9±0.4, Fe/Mn=26.7±3.4, Cr2O3=1.01±0.04 wt%, n=14.

Classification: Achondrite (ureilite)

Specimens: 20.2 g plus two probe mounts on deposit at UAz, Fredric Stephan holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson, AZ
Date:P February 2013
Mass (g):466.6
Weathering grade:medium
Fayalite (mol%):20.9±1.6
Ferrosilite (mol%):16.4±0.4
Wollastonite (mol%):9.6±1.0
Classifier:F. Stephan and K. Domanik, UAz
Type spec mass (g):20.2
Type spec location:UAz
Main mass:Fredric Stephan
Comments:Working name FS0038; submitted by K. Domanik
   and collections
UAz: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 Jan 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 1847 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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