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Northwest Africa 11200
Basic information Name: Northwest Africa 11200
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11200
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 1620 g
Meteoritical Bulletin:  MB 106  (2018)  Iron, IIAB
Recommended:  Iron, IIAB    [explanation]

This is 1 of 146 approved meteorites classified as Iron, IIAB.   [show all]
Search for other: IIAB irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 17 Apr 2017
Writeup from MB 106:

Northwest Africa 11200 (NWA 11200)


Purchased: December 2015

Classification: Iron meteorite (IIAB)

History: Originally purchased by Mirko Graul in 2011 or 2012 from a Moroccan dealer.

Physical characteristics: The fist-sized main mass is approximately equant, with a dark brown to light red-brown exterior.

Petrography: (C. Herd, UAb) Polished and etched surfaces reveal large (>2 cm) kamacite crystals, portions of which are cloudy; Neumann lines are evident on reflective surfaces. Schreibersite inclusions up to 1 cm in diameter are present. Terrestrial oxidation extends along some fractures, but is relatively low.

Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd and G. Chen UAb): Ni = 6.5, Co = 0.46 (both wt%); Cu = 135, Ga = 67, Ge = 223, Ru = 4.1, W = 0.71, Ir < 0.015, Pd = 2.3, Pt = 4.3, Au = 1.0 (all μg/g).

Classification: IIAB, hexahedrite.

Specimens: Type specimen consisting of a 13.9 g slice and a 30.3 g end piece at UAb. Main mass with A. Koppelt.

Data from:
  Table 0
  Line 0:
Place of purchase:Bernau bei Berlin
Date:P December 2015
Mass (g):1620
Class:Iron, IIAB
Shock stage:moderate
Weathering grade:low
Classifier:C. Herd, UAb
Type spec mass (g):44.2
Type spec location:UAb
Main mass:A. Koppelt
Comments:Field name AK16/1; 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)
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 1973 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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