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Northwest Africa 11450
Basic information Name: Northwest Africa 11450
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11450
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 305 g
Meteoritical Bulletin:  MB 106  (2018)  Diogenite-pm
Recommended:  Diogenite-pm    [explanation]

This is 1 of 50 approved meteorites classified as Diogenite-pm.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 13 Oct 2017
Writeup from MB 106:

Northwest Africa 11450 (NWA 11450)

(Northwest Africa)

Purchased: 2017 Apr

Classification: HED achondrite (Diogenite, polymict)

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

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed predominantly of angular diogenitic orthopyroxene grains, minor olivine and rare eucrite debris in a finer grained matrix. Other minerals are exsolved pigeonite, calcic plagioclase, silica polymorph, chromite, ilmenite and troilite.

Geochemistry: Diogenitic orthopyroxene (Fs18.9Wo1.3; Fs23.5Wo2.6, FeO/MnO = 27-29; N =2), clinopyroxene host (Fs28.8Wo42.2, FeO/MnO = 31), orthopyroxene exsolution lamella (Fs59.7Wo5.8, FeO/MnO = 32), olivine (Fa45.747.0, FeO/MnO = 49-55, N =2), subcalcic ferroaugite (Fs64.5Wo27.1, FeO/MnO = 39), plagioclase (An92.2Or0.3; An72.2Or2.3; N = 2).

Classification: Polymict diogenite breccia.

Specimens: 21.11 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):305.2
Shock stage:low
Weathering grade:low
Fayalite (mol%):45.7-47.0
Ferrosilite (mol%):18.9; 23.5; 28.8; 59.7
Wollastonite (mol%):1.3; 2.6; 42.2; 5.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.11
Type spec location:PSF
Main mass:F. Kuntz
Comments:Work name K351; 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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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ryan Upchurch   

     This is 1 of 8138 approved meteorites from (Northwest Africa) (plus 1941 unapproved names)

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