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Northwest Africa 6164
Basic information Name: Northwest Africa 6164
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6164
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 726 g
Meteoritical Bulletin:  MB 99  (2011)  Iron, IAB-MG
Recommended:  Iron, IAB-MG    [explanation]

This is 1 of 120 approved meteorites classified as Iron, IAB-MG.   [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 16 Sep 2010
Writeup from MB 99:

Northwest Africa 6164 (NWA 6164)

(Northwest Africa)

Purchased: Dec 2007

Classification: Iron meteorite (IAB-MG)

History: A single iron mass was purchased from a Moroccan dealer in December, 2007, by M. Graul.

Physical characteristics: The 726 g mass, measuring 88× 70 × 55 mm, has an irregular shape. The portion of the surface originally sitting in the soil is partially covered with light-brown caliche, whereas the remaining portion is glossy dark-brown due to polishing by wind-driven sand. No fusion crust is preserved.

Petrography: (M. D’Orazio, DST-PI) Etched sections show a coarse Widmanstätten pattern with kamacite lamellae (bandwidth = 1.6 ± 0.2 mm) and comb-net plessite fields in approximately 9:1 volumetric ratio. The heat-affected rim (≤1.5 mm) is partially preserved. Kamacite lamellae show abundant Neumann bands and host crystals of cohenite (up to 4 mm in length) with inclusions of schreibersite and taenite.

Geochemistry: Composition of the metal (ICP-MS; D’Orazio and Folco, 2003) is Co = 0.502, Ni = 7.01 (both in wt%), Cu = 122, Ga = 74, Ge = 281, As = 14.9, W = 1.23, Re = 0.205, Ir = 1.99, Pt = 5.8, Au = 1.49 (all in ppm).

Classification: Iron meteorite (IAB, main group), coarse octahedrite.

Specimens: Two etched full slices (12.8 and 7.6 g) and one etched endcut (7.7 g) are on deposit at DST-PI. M. Graul holds the main mass.

  • D'Orazio M. and Folco L. (2003) Chemical analysis of iron meteorites by inductively coupled plasma-mass spectrometry. Geostand. Newslett. 27, 215-225. (link)
Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P Dec 2007
Mass (g):726
Class:Iron, IAB-MG
Classifier:M. D'Orazio
Type spec mass (g):28.1
Type spec location:DST-PI
Main mass:M. Graul
Comments:Submitted by M. D'Orazio
   and collections
DST-PI: Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 56126 Pisa, Italy (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Gregor H.   

     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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