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| Northwest Africa 6259 | |||||||||||||||||||
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| 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:  1805 g | ||||||||||||||||||
| Classification history: |
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 |
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: MB108 Table 0 Line 0: |
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| Institutions 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) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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| Photos: |
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| Geography: |
Statistics: This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names) | ||||||||||||||||||
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| Revision history: |
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