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Northwest Africa 14494
Basic information Name: Northwest Africa 14494
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14494
Observed fall: No
Year found: 2017
Country: Mauritania
Mass:help 694 g
Classification
  history:
Recommended:  Iron, IAB complex    [explanation]

This is 1 of 77 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 14494 (NWA 14494)

Mauritania

Purchased: 2017

Classification: Iron meteorite (IAB complex)

History: Purchased from Luc Labenne at the 2017 Ensisheim show. Reportedly found in Mauritania.

Physical characteristics: The 693.8 g mass is roughly tabular, approximately 3 × 6 × 10 cm, and has a dark brown surface with numerous sub-cm regmaglypts on one side. The other side is more planar, and has a mottled red-brown appearance.

Petrography: (C. Herd and P. Hill, UAb) Petrographic investigation of a 1.5 × 4.5 cm polished and etched surface reveals schreibersite inclusions up to 3 mm in width and over 15 mm in length, surrounded by approx. 0.5 mm wide swathing kamacite.

Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd, P. Hill, and S. DuFrane UAb): Ni = 19.1, Co = 0.966 (both wt%); Ir = 0.15, Ga = 8.2, Ge = 12, As = 28.3, Sb = 0.857, Ru = 0.2, Re = 0.013, Os = 0.142, Pt = 0.14, Cu = 515 (all μg/g). W concentration was below detection (<0.1 ppb).

Classification: (C. Herd, UAb): IAB iron, ataxite. Most likely belongs to a high-Ni subgroup (sLH or sHH), by comparison with Wasson and Kallemeyn (2002).

Specimens: Type specimen consisting of a 27.4 g representative specimen at UAb. Main mass with Don Hurkot.

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:Ensisheim
Date:P 2017
Mass (g):693.8
Pieces:1
Class:Iron, IAB complex
Weathering grade:low
Classifier:C. Herd, UAb
Type spec mass (g):27.4
Type spec location:UAb
Main mass:Don Hurkot
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)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 166 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)

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