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Lunar Meteorite

Northwest Africa 11968

northwestern Africa

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 11968

 

Northwestern Africa

Purchased: 2015

Mass: 427.8 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Purchased by Jay Piatek from Adam Aaronson in Morocco, 2015.

 

Physical characteristics: Single stone. Fresh, light green-brown fusion crust covers a significant part of the surface; the remainder of the exterior is a smooth, lustrous black color. Saw cut reveals a fragmental breccia with many white feldspathic clasts set in a dark gray ground mass.

 

Petrography: C. Agee, UNM) This meteorite is a breccia of fragmental pyroxene, olivine, plagioclase grains set in a fine-grained matrix. Fe-metal, chromite, ilmenite, and troilite were detected.

 

Geochemistry: (C. Agee, UNM) Olivine Fa: 37.4±9.5, Fe/Mn=92±5, n=8; low-Ca pyroxene Fs36.1±3.5Wo5.4±1.3, Fe/Mn=54±0, n=2; high-Ca pyroxene Fs19.9±2.3Wo33.3±9.3, Fe/Mn=49±4, n=3; plagioclase An95.7±1.4, n=4; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=43.7±1.0, TiO2=0.20±0.11, Al2O3=30.7±3.6, Cr2O3=0.07±0.05, MgO=4.0±2.2, FeO=4.6±2.4, MnO=0.07±0.05, CaO=16.7±1.8, Na2O=0.34±0.09, K2O=0.05±0.02 (all wt%), n=12.

 

Classification: Lunar feldspathic breccia

 

Specimens: 20.0 g including a probe mount on deposit at UNM, Jay Piatek holds 407.8 g.

 

Randy Says…

I have not studied this one.

 

More Information

Meteoritical Bulletin Database

NWA 11968

References

 

 

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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 that
you’ve found until you read this and this.

 

e-mailkorotev@wustl.edu

Last revised: 24 September 2018