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Northwest Africa 11649
Basic information Name: Northwest Africa 11649
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11649
Observed fall: No
Year found: 2005
Country: Morocco
Mass:help 17.4 kg
Classification
  history:
Recommended:  Iron, IAB-MG    [explanation]

This is 1 of 112 approved meteorites classified as Iron, IAB-MG.   [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 20 Feb 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11649 (NWA 11649)

Morocco

Purchased: 2005

Classification: Iron meteorite (IAB-MG)

History: Purchased from a Moroccan dealer at the 2005 Munich show.

Physical characteristics: The meteorite is oblong, approximately 20 cm in longest dimension, and is characterized by a dark brown to black, regmaglypted exterior.

Petrography: (C. Herd, UAb) Optical investigation of a ~1.5 × 3 cm polished and etched surface reveals cm-scale, equant kamacite grains with Neumann lines. Sulfide inclusions are present; no other inclusions are visible, although the surface area examined is relatively small. Terrestrial alteration has occured along fractures connecting to the exterior.

Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd and G. Chen UAb): Ni = 6.7, Co = 0.46 (both wt%); Ir = 3.5, Ga = 88, As = 12.5, W = 1.4, Re = 0.31, Pt = 8.6, Cu = 134, Au = 1.3 (all μg/g).

Classification: (C. Herd, UAb): IAB iron, Main Group, through comparison of bulk composition with data from Wasson and Kallemeyn (2002).

Specimens: Type specimen consisting of one representative piece (22.8 g) at UAb. Main mass in the Hollis Meteorite Collection.

Bibliography:
  • 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:
  MB107
  Table 0
  Line 0:
Place of purchase:Munich
Date:P 2005
Mass (g):17400
Pieces:1
Class:Iron, IAB-MG
Shock stage:moderate
Weathering grade:low
Classifier:C. Herd, UAb
Type spec mass (g):22.8
Type spec location:UAb
Main mass:Hollis Meteorite Collection
Comments:Submitted by C. Herd
Institutions
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1405 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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