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Northwest Africa 11451
Basic information Name: Northwest Africa 11451
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11451
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 106 g
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 356 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 13 Oct 2017
Writeup from MB 106:

Northwest Africa 11451 (NWA 11451)

(Northwest Africa)

Purchased: 2017 Apr

Classification: HED achondrite (Eucrite, polymict)

History: Purchased by Fabien Kuntz in April 2017 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of shocked and altered eucrite clasts (with differing textures) plus related debris in a finer grained matrix. Pyroxene (exsolved pigeonite) is pale orange in thin section and calcic plagioclase is polycrystalline; accessory minerals include fayalite, ilmenite, troilite, Ni-free metal and barite.

Geochemistry: Orthopyroxene host (Fs67.9Wo2.0, FeO/MnO = 29), clinopyroxene exsolution lamella (Fs31.1Wo42.9, FeO/MnO = 33), orthopyroxene host (Fs58.7Wo3.5, FeO/MnO = 33), clinopyroxene exsolution lamella (Fs26.5Wo43.2, FeO/MnO = 33), fayalite (Fa81.2-81.8, FeO/MnO = 43), plagioclase (An90,7-90.9Or0.5-0.2, N = 2).

Classification: Eucrite (polymict breccia, shocked).

Specimens: 22.37 g including one polished thin section at PSF; remainder with Kuntz.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2017 Apr
Mass (g):106
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):81.2-81.8
Ferrosilite (mol%):67.9; 31.1; 58.7; 26.5
Wollastonite (mol%):2.0; 42.9; 3.5; 43.2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22.37
Type spec location:PSF
Main mass:F. Kuntz
Comments:Work name K345; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Kuntz: Fabien Kuntz, France; Website (private address)
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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     This is 1 of 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

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