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Northwest Africa 11104
Basic information Name: Northwest Africa 11104
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11104
Observed fall: No
Year found: 2016
Country: Morocco
Mass:help 149.6 g
Meteoritical Bulletin:  MB 106  (2018)  Iron, IAB-an
Recommended:  Iron, IAB-an    [explanation]

This is 1 of 4 approved meteorites classified as Iron, IAB-an.   [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 17 Feb 2017
Writeup from MB 106:

Northwest Africa 11104 (NWA 11104)


Purchased: June 2016

Classification: Iron meteorite (IAB, anomalous)

History: Originally obtained by Rachid Chaoui of Ouarzazate, subsequently purchased by F. Kuntz at the Ensisheim show in June 2016.

Physical characteristics: The main mass has a dark brown exterior and is irregular in shape.

Petrography: Polished surfaces display abundant inclusions of silicates and sulfides. Etched surfaces show few kamacite lamellae ~0.5 mm across; otherwise, kamacite and taenite grains have irregular shapes and are interstitial to the inclusions.

Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd and G. Chen UAb): Ni = 10.8, Co = 0.46 (both wt%); Ir = 3.3, Ga = 73, Ge = 322, W = 0.9, Re = 0.3, Os = 1.3, Cu = 471, Ru = 4.9, Pd = 4.2, Pt = 5.4 (all μg/g).

Classification: (C. Herd, UAb): IAB anomalous. Ni content is intermediate for the IAB complex of Wasson and Kallemeyn (2002); however, Ga and Ge are too high to be considered part of the sLM subgroup.

Specimens: Type specimen consisting of two representative slices (22.4 and 1.2 g) at UAb. Main mass with Kuntz.

  • Wasson J.T. and Kallemeyn, G.W. (2002) The IAB iron-meteorite complex: A group, five subgroups, numerous grouplets, closely related, mainly formed by crystal segregation in rapidly cooling melts. Geochim. Cosmochim. Acta 66 2445-2473 (link)
Data from:
  Table 0
  Line 0:
Place of purchase:Ensisheim
Date:P June 2016
Mass (g):149.6
Class:Iron, IAB-an
Shock stage:low
Weathering grade:low
Classifier:C. Herd, UAb
Type spec mass (g):23.6
Type spec location:UAb
Main mass:F. Kuntz
Comments:Field name RC78.5; submitted by C. Herd
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
Kuntz: Fabien Kuntz, France; Website (private address)
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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