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Northwest Africa 11105
Basic information Name: Northwest Africa 11105
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11105
Observed fall: No
Year found: 2016
Country: Algeria
Mass:help 554 g
Meteoritical Bulletin:  MB 106  (2018)  Iron, IAB-MG
Recommended:  Iron, IAB-MG    [explanation]

This is 1 of 120 approved meteorites classified as Iron, IAB-MG.   [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 11105 (NWA 11105)


Purchased: April 2016

Classification: Iron meteorite (IAB-MG)

History: Two specimens weighing 378 g and 176 g reportedly found in Algeria.

Physical characteristics: The main masses have elongate, flattened shapes with dark brown to light red-brown exterior surfaces. Terrestrial alteration, including oxidation and presence of caliche are evident covering approximately half of each rock.

Petrography: Polished and etched surfaces show an irregular pattern with rare kamacite laths approximately 1 mm across. Veins of iron oxides extend into the interior. No fusion crust or heat-affected zone was observed.

Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd and G. Chen UAb): Ni = 6.4, Co = 0.45 (both wt%); Ir = 2.4, Ga = 66, Ge = 331, W = 2.3, Re = 0.2, Os = 0.4, Cu = 183, Ru = 13.0, Pd = 1.8, Pt = 17.3 (all μg/g).

Classification: (C. Herd, UAb): IAB-MG, although concentrations of W and Pt seem to be anomalously high.

Specimens: Type specimen consisting of a 12.1 g representative slice and a 14.5 g end piece at UAb. Main mass with Kuntz.

Data from:
  Table 0
  Line 0:
Place of purchase:Ouarzazate
Date:P April 2016
Mass (g):554
Class:Iron, IAB-MG
Shock stage:low
Weathering grade:low
Classifier:C. Herd, UAb
Type spec mass (g):26.6
Type spec location:UAb
Main mass:F. Kuntz
Comments:Field name K300; 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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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Mike Markowitz   


     This is 1 of 1250 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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