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Northwest Africa 11493
Basic information Name: Northwest Africa 11493
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11493
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 1317 g
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 275 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 28 Nov 2017
Writeup from MB 106:

Northwest Africa 11493 (NWA 11493)

(Northwest Africa)

Purchased: 2017 Apr

Classification: HED achondrite (Eucrite, monomict)

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

Petrography: (A. Irving and S. Kuehner, UWS) Sparse microgabbroic eucrite clasts plus related debris are set in a fine grained, quench-textured matrix containing patches of calcite and minor barite. Minerals are exsolved pigeonite (pale orange in thin section), calcic plagioclase (polycrystalline), silica polymorph, ilmenite, chromite (with variable Ti content) and troilite.

Geochemistry: Orthopyroxene host (Fs63.0-63.1Wo1.9-2.6, FeO/MnO = 31-34, N = 2), clinopyroxene exsolution lamellae (Fs27.1-29.0Wo43.4-41.6, FeO/MnO = 31-34, N = 2), plagioclase (An90.4-91.5Or0.5, N = 2).

Classification: Eucrite (monomict microgabbroic melt-matrix breccia, shocked).

Specimens: 28.27 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):1317
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):63.0-63.1; 27.1-29.0
Wollastonite (mol%):1.9-2.6; 43.4-41.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):28.27
Type spec location:PSF
Main mass:F. Kuntz
Comments:Work name K364; 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 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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