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Northwest Africa 11447
Basic information Name: Northwest Africa 11447
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11447
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 62.9 g
Meteoritical Bulletin:  MB 106  (2018)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 439 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 30 Oct 2017
Writeup from MB 106:

Northwest Africa 11447 (NWA 11447)

(Northwest Africa)

Purchased: 2017 Apr

Classification: HED achondrite (Howardite)

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

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of ~50 vol.% eucrite material, ~50 vol.% diogenite material and sparse, dark carbonaceous chondrite clasts (containing small fosterite-bearing chondrules) set in a finer grained matrix. Eucrite material consists mostly of crystalline debris of exsolved pigeonite, calcic plagioclase, silica polymorph, troilite, chromite, ilmenite and rare baddeleyite, with some subophitic lithic clasts. Diogenite material is mainly orthopyroxene (exhibiting undulose extinction and ferroan reaction rims) plus some polycrystalline clasts. Sparse grains of intermediate olivine and ferroan augite are also present.

Geochemistry: Diogenitic orthopyroxene (core Fs18.4Wo1.2; rim Fs53.9Wo5.0; FeO/MnO = 30-31), host orthopyroxene (Fs50.6Wo2.1, FeO/MnO = 33), clinopyroxene exsolution lamella (Fs24.7Wo38.8, FeO/MnO = 25), augite (Fs52.9Wo44.7, FeO/MnO = 31), olivine (Fa54.5-57.3, FeO/MnO = 45-53, N = 2), plagioclase (An86.8-89.7Or0.7-0.6, N = 2).

Classification: Howardite.

Specimens: 12.75 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):62.9
Shock stage:low
Weathering grade:low
Fayalite (mol%):54.5-57.3
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):12.75
Type spec location:PSF
Main mass:F. Kuntz
Comments:Work name K359; 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 9116 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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