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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
Classification
  history:
Meteoritical Bulletin:  MB 99  (2011)  Iron, IAB-MG
Recommended:  Iron, IAB-MG    [explanation]

This is 1 of 118 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
Writeuphelp
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.

Bibliography:
  • 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:
  MB99
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P Dec 2007
Mass (g):726
Pieces:1
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
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dirk Hohmann Photo added 19 Apr 2022
Photo added 19 Apr 2022
Photo added 19 Apr 2022
Franco Vignato Photo added 19 Apr 2022
Gregor H.   
Mirko Graul Photo added 19 Apr 2022
Photo added 19 Apr 2022
Photo added 19 Apr 2022
The Wilcox Collection of Meteorites Photo added 19 Apr 2022
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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