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Northwest Africa 6259
Basic information Name: Northwest Africa 6259
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6259
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 1805 g
Meteoritical Bulletin:  MB 108  (2020)  Iron, ungrouped
Recommended:  Iron, ungrouped    [explanation]

This is 1 of 151 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 23 Dec 2019
Writeup from MB 108:

Northwest Africa 6259 (NWA 6259)

(Northwest Africa)

Find: 2010 Feb

Classification: Iron meteorite (ungrouped)

Petrography: Petrographic description. Sample is neither well polished nor etched. Based on this sample, the structure is that of a Ni-rich ataxite. The only recognized inclusions are small troilite ovals with lengths in the range 2 to 6 mm and widths typically 2/3 of the length. A layer of dark oxide, probably a weathering product, surrounds these FeS blebs. The surface is heavily oxidized but the sawed and roughly polished faces oxidize only slowly in the storage container.

Geochemistry: Composition (based on duplicate INAA): Co, 6.08 mg/g; Ni, 422 mg/g; Cu, 3250 μg/g; Ga, 5.76 μg/g; As, 39.5 μg/g; Sb, 4595 ng/g; W, 0.15 μg/g; Ir 0.027 μg/g; Au, 3.40 μg/g. The meteorite has an extraordinary composition. The Sb content is the second highest known, second only to Oktibbeha County.

Classification: The meteorite is ungrouped with no close relatives. Because of the high As, Au, Sb and Cu it may be related to the IAB complex.

Data from:
  Table 0
  Line 0:
Date:2010 Feb
Mass (g):1805
Class:Iron, ungrouped
Classifier:J.T. Wasson, UCLA
Type spec mass (g):80
Type spec location:UCLA
Main mass:M. Graul
Comments:Submitted by J. T. Wasson
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Photos from the Encyclopedia of Meteorites:
Sergey Vasiliev   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dott. Geol. Alberto Giusta   

     This is 1 of 9559 approved meteorites from (Northwest Africa) (plus 1872 unapproved names)

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