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Lunar Meteorite

Northwest Africa 10678

northwestern Africa

 

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Two views of Northwest Africa 10678
(photo credit: Ahmad Bouragaa)

 

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Two sawn faces of NWA 10678
(photo credit: Gary Fujihara)

 

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Two views of lab sample of NWA 10678.
(photo credit: Randy Korotev)



from The Meteoritical Bulletin, No. 105

Northwest Africa 10678

(Northwestern Africa)
Purchased: 2016 February
Mass: 49.15 g

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased by Gary Fujihara in February 2016 from a dealer in Ouarzazate, Morocco.

Physical characteristics: A single stone (49.15 g) lacking fusion crust. Interior slices exhibit separated white clasts and rare small metal grains set in a black matrix (~60 vol.%).

Petrography: (A. Irving and S. Kuehner, UWS) Olivine-poor feldspathic breccia composed of angular mineral grains in a finer matrix. Minerals are anorthite, orthopyroxene, pigeonite, augite, rare olivine, ilmenite, Ti-chromite, troilite, taenite and zirconolite.

Geochemistry: (P. Carpenter, WUSL; S. Kuehner, UWS) Orthopyroxene (Fs39.9Wo4.8, FeO/MnO = 54), pigeonite (Fs31.8Wo14.7, FeO/MnO = 49), subcalcic augite (Fs21.2Wo33.9, FeO/MnO = 44), low-Ca pyroxene host (Fs43.8Wo10.8, FeO/MnO = 67), clinopyroxene exsolution lamella (Fs28.4Wo33.9, FeO/MnO = 57), anorthite (An­Or0.1, N = 4), olivine (Fa24.8-47.7, FeO/MnO = 83-97, N = 4). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave (in wt.%) FeO 3.8, Na2O 0.39; (in ppm) Sc 7.2, Cr 490, Co 13, La 6.2, Sm 2.8, Eu 0.91, Yb 1.8, Lu 0.25, Hf 2.0, Th 0.9.

Classification: Lunar (feldspathic breccia).

Specimens: 9.85 g including one slice and a polished mount at UWB; remainder with Mr. G. Fujihara.

 

Randy Says…

I think this one is unique.

 

More Information

Meteoritical Bulletin Database

NWA 10678

References

 

Korotev R. L. and Irving A. J. (2017) Still not keeping up with the lunar meteorites – 2017. 48th Lunar and Planetary Science Conference, abstract no. 1498.

 

 

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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: 5-February-2017