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Northwest Africa 14493
Basic information Name: Northwest Africa 14493
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14493
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 97.3 g
Classification
  history:
Recommended:  Iron, IAB complex    [explanation]

This is 1 of 79 approved meteorites (plus 1 unapproved name) classified as Iron, IAB complex.   [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 20 Dec 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14493 (NWA 14493)

Morocco

Purchased: 2015

Classification: Iron meteorite (IAB complex)

History: Purchased from Mirko Graul in 2015, who had previously purchased it from a Moroccan merchant.

Physical characteristics: The 97.3 g mass is rounded and elongate. One side is smoother and possibly wind abraded, whereas the other contains small regmaglypts and has a dark brown surface.

Petrography: (C. Herd, UAb) Petrographic investigation of a 2.5 cm × 5 cm polished and etched surface reveals numerous, thin (sub-mm) metallic veins cutting across the short axis of the specimen, suggestive of shearing. Neumann lines are present in kamacite. A Widmanstatten pattern is faintly preserved, with bandwidth approximately 1.5 to 2 mm. Sub-mm schreibersite inclusions are present throughout.

Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd, P. Hill, and S. DuFrane UAb): Ni = 9.0, Co = 0.447 (both wt%); Ir = 1.9, Ga = 81, Ge = 360, As = 12.8, W = 0.6, Sb = 0.28, Ru = 6.4, Re = 0.18, Os = 1.5, Pt = 6.3, Cu = 135 (all μg/g).

Classification: (C. Herd, UAb): IAB iron, highly shocked coarse octahedrite. Most likely belongs to the Main Group, by comparison with Wasson and Kallemeyn (2002).

Specimens: Type specimen consisting of a 45.0 g representative specimen at UAb. Main mass with John Shea.

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:
  MB110
  Table 0
  Line 0:
Place of purchase:Internet
Date:P 2015
Mass (g):97.3
Pieces:1
Class:Iron, IAB complex
Shock stage:high
Weathering grade:low
Classifier:C. Herd, UAb
Type spec mass (g):45.0
Type spec location:UAb
Main mass:John Shea
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., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1902 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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