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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 76 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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1837 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater)

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