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Northwest Africa 11406
Basic information Name: Northwest Africa 11406
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11406
Observed fall: No
Year found: 2016
Country: Algeria
Mass:help 101.3 g
Meteoritical Bulletin:  MB 106  (2018)  CO3
Recommended:  CO3    [explanation]

This is 1 of 616 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 13 Oct 2017
Writeup from MB 106:

Northwest Africa 11406 (NWA 11406)


Purchased: 2016

Classification: Carbonaceous chondrite (CO3)

History: The meteorite was found in Algeria in 2014 by nomads. Zs. Kereszty purchased it in the Munich Show 2016 from Adam Aithiba (Moroccoan meteorite seller) and made 3 thin sections.

Physical characteristics: The meteorite contains up to 500 μm sized chondrules, CAI and AOA grains embedded in dark, poorly transparent matrix that makes up around half of the meteorite. Some chondrules are fragmented. The whole meteorite is substantially weathered.

Petrography: Minerals: 80% olivine(above 60 μm Fe-rich olivine, and olivine with Fe-rich rim and Mg rich core are also present), 10% px (10-20 μm-sized, at the rim of chondrules and AOAs), opaque mineral 4%: goethite, pentlandite, pyrite, chromite, troilite, kamacite, taenite, other accessories: 6% (wollastonite, jadeite, feldspar). CAI-AOA: 12% (up to 300 μm-sized, coarse-grained, with sinusoidal, multi-cored with fine-grained rims), matrix: 38% (including 10-20 µm olivine crystals, submicroscopic px, opaque minerals, chondrules: 49% (size: up to 400 μm, average: 200 μm). Weathering: clay around chondrules and between larger olivine grains, and iron-oxide veins. Shock effects: intergranular fractures and brecciation.

Geochemistry: olivine:: Fa36.7±18 (Fa0-72.7, N=93); cpx: Fs15.5±15.7Wo38.0±10.6 (Fs0.0-54.8Wo8.5-48.3 N=20); and opx: Fs2.3±1.3Wo1.8±1.7, (Fs0.0-5.3Wo0.0-4.8, N=13

Classification: CO3

Specimens: 3 slices of 23 g at CSFK

Data from:
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2016
Mass (g):101.3
Shock stage:S2
Weathering grade:medium
Fayalite (mol%):36.7±18 (0-72.7, N=93).
Classifier:Gyollai I., Kereszturi A., Kereszty Zs., Szabo M.
Type spec mass (g):23
Type spec location:CSFK
Main mass:at Kereszty Zs. private collector
Comments:Submitted by Gyollai I., Kereszturi A., Kereszty Zs.
   and collections
CSFK: Research Center for Astronomy and Earth Sciences, H-1121 Budapest, Konkoly Thege Miklós út 15-17.l Hungary, Hungary (institutional address; updated 7 Apr 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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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Zsolt Kereszty   


     This is 1 of 1232 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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