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Northwest Africa 14955
Basic information Name: Northwest Africa 14955
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14955
Observed fall: No
Year found: 1989
Country: Morocco
Mass:help 1470 g
Classification
  history:
Recommended:  Iron, IAB-MG    [explanation]

This is 1 of 119 approved meteorites classified as Iron, IAB-MG.   [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 20 Jun 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14955 (NWA 14955)

Morocco

Purchased: 1989

Classification: Iron meteorite (IAB-MG)

History: Purchased by Roberto Vargas in 2021 from R.A. Langheinrich who purchased it from a Moroccan dealer in 1989. Reportedly found in the area near Zag.

Physical characteristics: The single, fist-sized mass has a black to dark brown surface. Iron oxides are present extending into the interior in some spots.

Petrography: (C. Herd, UAb) Photos of a polished and etched surface reveals equant to elongate kamacite crystals with 120° grain boundaries. Kamacite bandwidth is consistent with coarsest octahedrite. Neumann lines are present in kamacite. Dark (non-metallic) inclusions on the scale of the kamacite crystals are present, as well as mm-scale metallic inclusions (likely schreibersite); inclusion mineralogy has not been determined. Alteration extends along grain boundaries into the interior.

Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd, P. Hill, and S. DuFrane UAb): Ni = 6.3, Co = 0.604 (both wt%); Ir = 3.2, Ga = 102, Ge = 444, As = 11, Sb = 0.3, Pt = 7.1, Cu = 134, Au = 1.2 (all μg/g).

Classification: (C. Herd, UAb): IAB iron, Main Group. Although Co is higher and Au slightly lower than expected, composition is consistent with IAB-MG for all other reported elements.

Specimens: Type specimen of 30.3 g at UAb. Main mass with Roberto Vargas.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 1989
Mass (g):1470
Pieces:1
Class:Iron, IAB-MG
Shock stage:moderate
Weathering grade:moderate
Classifier:C. Herd, UAb
Type spec mass (g):30.3
Type spec location:UAb
Main mass:Roberto Vargas
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. 111, in preparation (2022)
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1847 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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