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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:
Meteoritical Bulletin:  MB 111  (2023)  Iron, IAB-MG
Recommended:  Iron, IAB-MG    [explanation]

This is 1 of 121 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 Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2049 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)
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Revision
  history:
  This lists important revisions made to data for this record.

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