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Lunar Meteorite

Northwest Africa 10447

northwestern Africa

 

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Northwest Africa 10447

Photo credit: Fabien Kuntz

 

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Lab sample of NWA 10447

Photo credit: Randy Korotev

 

from The Meteoritical Bulletin, No. 104

 

Northwest Africa 10447

 

(northwestern Africa)

Purchased: 2015 May

Mass: 21.73 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Purportedly found with other similar stones near Al Mahbas, southern Morocco, and purchased by Fabien Kuntz in May 2015 from a dealer in Agadir, Morocco.

 

Physical characteristics: A single small stone (21.73 g) lacking fusion crust. The interior exhibits white, pale orange and light gray clasts set in a gray matrix (~25 vol.%).

 

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed of mineral clasts of anorthite, olivine, pigeonite, augite, subcalcic augite, ferropigeonite, fayalite, silica polymorph, Ti-Al-chromite, ilmenite, troilite and rare baddeleyite in a finer grained matrix.

 

Geochemistry: Olivine (Fa37.0-39.9, FeO/MnO = 97, N = 2), pigeonite (Fs29.1Wo­, FeO/MnO = 55), ferropigeonite (Fs65.9Wo7.3, FeO/MnO = 70), subcalcic augite (Fs20.5Wo25.4; Fs64.7Wo25.2; FeO/MnO = 55-70), augite (Fs31.6Wo37.5, FeO/MnO = 74), fayalite (Fa73.9, FeO/MnO = 106), plagioclase (An91.1-91.4Or0.1-0.4, N = 2). Bulk composition (R. Korotev, WUSL): INAA of subsamples gave the following mean abundances (in wt.%) FeO 15.3, Na2O 0.30; (in ppm) Sc 30.2, Ni 140, La 5.0, Sm 2.47, Eu 0.67, Yb 1.9, Lu 0.28, Hf 1.8, Th 0.8.

 

Classification: Lunar (feldspathic breccia).

 

Specimens: 4.44 g including a polished endcut at PSF; remainder with Kuntz.

         

Randy Says…

The Northwest Africa 10447 is one of the most mafic (iron rich) of the brecciated lunar meteorites.

 

More Information

Meteoritical Bulletin Database

NWA 10447

References

Korotev R. L. and Irving A. J. (2016) Not quite keeping up with the lunar meteorites – 2016. 47th Lunar and Planetary Science Conference, abstract no. 1358.

 

 

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Prepared by
: Randy L. Korotev
 
Department of Earth and Planetary Sciences
Washington University in St. Louis

Please don't contact me about the meteorite you think you've found until you read this and this.


e-mail
korotev@wustl.edu

Last revised: 11-Apr-2016