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Northwest Africa 12395
Basic information Name: Northwest Africa 12395
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12395
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 87 g
Classification
  history:
Recommended:  Iron, IID    [explanation]

This is 1 of 24 approved meteorites classified as Iron, IID.   [show all]
Search for other: IID irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 9 Feb 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12395 (NWA 12395)

Morocco

Purchased: May 2018

Classification: Iron meteorite (IID)

History: Purchased in May 2018 from Goulmima-based Lahsen Ouabicha, via Internet. No other pieces similar to it were found, according to the dealer.

Physical characteristics: The meteorite is roughly oval in shape, and measures approximately 5 × 3 × 2 cm.

Petrography: (C. Herd, UAb) Optical investigation of a ~4.5 × 2.5 cm polished and etched slice reveals a well-developed Widmanstätten pattern consistent with a medium octahedrite (0.52±0.06 mm; n=38). Two lath-shaped schreibersite inclusions parallel to the Widmanstatten pattern are present. Terrestrial alteration appears to have only affected the exterior surface.

Geochemistry: ICP-MS data, using sample of North Chile (Filomena) as standard (C. Herd and G. Chen UAb): Ni = 10.3, Co = 0.69 (both wt%); Ir = 9.1, Ga = 75, Ge = 89, As = 9.3, W = 2.8, Re = 0.9, Os = 0.7, Pt = 16.9, Cu = 253, Au = 0.85 (all μg/g).

Classification: (C. Herd, UAb): IID iron, through comparison of bulk composition with data from Wasson and Huber (2006), medium octahedrite.

Specimens: Type specimen consisting of a 21 g representative slice at UAb. Main mass with Craig Zlimen.

Bibliography:
  • Wasson J.T. and Huber H. (2006) Compositional trends among IID irons; their possible formation from the P-rich lower magma in a two-layer core. Geochim. Cosmochim. Acta 70 6153–6167. (link)
Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P May 2018
Mass (g):87
Pieces:1
Class:Iron, IID
Shock stage:low
Weathering grade:low
Classifier:C. Herd, UAb
Type spec mass (g):21
Type spec location:UAb
Main mass:Craig Zlimen
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. 108, in preparation (2019)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1386 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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