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Northwest Africa 14959
Basic information Name: Northwest Africa 14959
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14959
Observed fall: No
Year found: 2021
Country: Mauritania
Mass:help 222 g
Classification
  history:
Recommended:  Iron, ungrouped    [explanation]

This is 1 of 143 approved meteorites (plus 1 unapproved name) classified as Iron, ungrouped.   [show all]
Search for other: Iron meteorites, Metal-rich meteorites, and Ungrouped irons
Comments: Approved 5 Jul 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14959 (NWA 14959)

Mauritania

Purchased: 2021 Sept

Classification: Iron meteorite (ungrouped)

History: Acquired by Shun-Chung Yang and Juan Chen from a broker who resides in Safi, Morocco in September 2021. Reportedly found in Mauritania. Shun-Chung Yang analyzed the elemental composition by using HR-ICPMS for preliminary assessment, which showed 50% Fe, 46% Ni and 0.56% Co. A sample was then sent to UAb for formal classification.

Physical characteristics: Consists of a single, 222 g oriented mass.

Petrography: (C. Herd, UAb) Optical and SEM investigation of a ~2.5 × 3 cm cross sectional slice reveals rounded inclusions of troilite up to several mm across with ~100 µm schreibersite grains at their rims, and rare <10 µm kamacite grains in their interiors. The main metal portion is high in Ni (over 40% by EDS) and is structureless. Minor alteration is present along fractures extending into the interior.

Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd, P. Hill, and S. DuFrane UAb): Ni = 44.6, Co = 0.569 (both wt%); Ir = 0.03, Ga = 5.8, Ge = 18, As = 35, Ru = 0.78, Pd = 29, Sb = 4.8, W = 0.08, Pt = 1.2, Cu = 3430, Au = 2.4 (all µg/g).

Classification: (C. Herd, UAb): Iron, ungrouped. May be related to high-Ni members of the IAB Complex.

Specimens: Type specimen of 21.5 g at UAb. Main mass with Shun-Chung Yang and Juan Chen.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Safi
Date:P 2021 Sept
Mass (g):222
Pieces:1
Class:Iron, ungrouped
Shock stage:low
Weathering grade:low
Classifier:C. Herd, UAb
Type spec mass (g):21.5
Type spec location:UAb
Main mass:Shun-Chung Yang
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:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 176 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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