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Northwest Africa 15591
Basic information Name: Northwest Africa 15591
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15591
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 212 g
Recommended:  Iron, ungrouped    [explanation]

This is 1 of 146 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 29 Jan 2023
Writeup from MB 112:

Northwest Africa 15591 (NWA 15591)

(Northwest Africa)

Purchased: June 2022

Classification: Iron meteorite (ungrouped)

History: The meteorite was purchased from a meteorite dealer at the mineral and gem show in Sainte-Marie-aux-Mines, France.

Physical characteristics: Dark brownish, mostly rounded individual without fusion crust.

Petrography: Polished and etched surface shows a well-developed Widmanstätten pattern with kamacite lamellae (bandwidth 0.4.-0.7 mm) and plessite areas between them. Rare about 1-2 mm sized troilite inclusions are present. Minor alteration extends along fractures into the interior.

Geochemistry: ICP-MS data (Vinciane Debaille, Université Libre de Bruxelles, Belgium): Ni = 9.53, Co = 0.36, P = 0.13 (all wt%); Cr = 17.6, Cu = 131.8, Ge = 7.39, Ga = 2.60, As = 10.9, Mo = 5.60, Pd = 2.91, Ir = 0.40, Au = 0.77 (all ppm); µXRF data (MfN, Berlin): Ni = 9.51; Co = 0.35; P = 0.11 (all wt%)

Classification: Iron meteorite (ungrouped). Ungrouped based on Ge and low Co contents plus Au/As and Au/Ni ratios that do not fit any known iron meteorite group.

Data from:
  Table 0
  Line 0:
Place of purchase:Sainte-Marie-aux-Mines, France
Date:P June 2022
Mass (g):211.9
Class:Iron, ungrouped
Shock stage:low
Weathering grade:low
Classifier:A. Greshake, MNB
Type spec mass (g):27.6
Type spec location:MNB
Main mass:Hanno Strufe and Andreas Gruenemeyer
Comments:Submitted by Ansgar Greshake
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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