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Northwest Africa 6165
Basic information Name: Northwest Africa 6165
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6165
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 29 g
Classification
  history:
Meteoritical Bulletin:  MB 99  (2011)  Iron, IAB-sLM
Recommended:  Iron, IAB-sLM    [explanation]

This is 1 of 12 approved meteorites classified as Iron, IAB-sLM.   [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 6165 (NWA 6165)

(Northwest Africa)

Purchased: Dec 2003

Classification: Iron meteorite (IAB-sLM)

History: A single small iron mass was purchased in Erfoud, Morocco, in December, 2003, by F. Kuntz.

Physical characteristics: The 29 g mass measuring 3.5 × 1 × 1 cm is covered by terrestrial iron oxidation products and lacks fusion crust.

Petrography: (M. D’Orazio, M. Gemelli, DST-PI) Etched sections display a fine Widmanstätten pattern of straight kamacite lamellae with a bandwidth of 0.25 ± 0.05 mm. Kamacite lamellae show Neumann bands and sub-boundaries. Schreibersite is common as large skeleton crystals (to 1.5 cm) enveloped in swathing kamacite. They are frequently brecciated and cemented by terrestrial oxidation products. The heat-affected rim (maximum observed thickness 250 µm) is locally very well preserved. Close to the heat-affected rim are found melted schreibersite crystals with dendritic texture and the kamacite is recrystallized into serrated α2 grains.

Geochemistry: Composition of the metal (ICP-MS; D’Orazio and Folco, 2003) is: Co = 0.492, Ni = 10.8 (both in wt%), Cu = 214, Ga = 18.0, Ge = 24.2, As = 21.2, W = 0.72, Re = 0.03, Ir = 0.40, Pt = 3.45, Au = 1.60 (all in ppm).

Classification: Iron meteorite, fine octahedrite, IAB-sLM, moderate weathering grade.

Specimens: Two etched full slices (3.03 and 2.53 g) are on deposit at DST-PI. F. Kuntz 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 2003
Mass (g):29
Pieces:1
Class:Iron, IAB-sLM
Classifier:M. D'Orazio
Type spec mass (g):5.5
Type spec location:DST-PI
Main mass:F. Kuntz
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)
Kuntz: Fabien Kuntz, France; Website (private address)
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)
Mirko Graul            
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6900 approved meteorites from (Northwest Africa) (plus 2027 unapproved names)

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