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Northwest Africa 10859 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10859 This is an OFFICIAL meteorite name. Abbreviation: NWA 10859 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 125 approved meteorites classified as Achondrite-ung. [show all] Search for other: Achondrites, Ungrouped achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 14 Mar 2017 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 106:
Northwest Africa 10859 (NWA 10859) (Northwest Africa) Purchased: 2016 May Classification: Ungrouped achondrite History: Purportedly found near Tan Tan, Morocco, and purchased by Ben Hoefnagels in May 2016 from a dealer in Ouarzazate, Morocco. Physical characteristics: A group of small , dark reddish-brown stones, mostly lacking fusion crust (total weight 215 g). Fresh interiors are gray with tiny grains of visible shiny metal. Petrography: (A. Irving and S. Kuehner, UWS) Triple grain junction texture. Grainsize mostly 0.1-0.2 mm, but some larger grains up to 0.4 mm. Minerals are olivine, clinopyroxene, intermediate plagioclase, troilite, chromite, kamacite and taenite. Geochemistry: Olivine (Fa31.8-31.9, FeO/MnO = 75-77, N = 3), clinopyroxene (Fs11.4-11.5Wo43.6-43.4, FeO/MnO = 37-40, N = 3). Oxygen isotopes (K. Ziegler, UNM): analysis of acid-washed subsamples by laser fluorination gave, respectively, δ17O -3.706, -3.702, -3.634, -3.817; δ18O -0.567, -0.835, -0.737, -0.943; Δ17O -3.407, -3.261, -3.245, -3.319 per mil. Classification: Ungrouped achondrite, paired with NWA 10503. Specimens: 20.2 g including one polished thin section at UWB; remainder with Mr. B. Hoefnagels. | ||||||||||||||||||||||||||||||
Data from: MB106 Table 0 Line 0: |
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Plots: | O isotopes: | ||||||||||||||||||||||||||||||
Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) |
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Catalogs: |
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References: | Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |