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Lunar Meteorite

Northwest Africa 11789

northwestern Africa

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 11789

 

Mauritania

Purchased: 2017

Mass: 5.49 kg

 

Lunar meteorite (feldspathic breccia)

 

History: Purchased in Mauritania by Dustin Dickens from anonymous meteorite hunter.

 

Physical characteristics: Nine black visually identical appearing pieces that fit back together to form a single mass with the largest piece weighing over 2 kg and the smallest under 45 g. The larger pieces show a black-brown fusion crust and thumb printing. Saw cut reveals a fragmented breccia with white feldspathic clasts set in a black ground mass.

 

Petrography: (C. Agee, UNM) This meteorite is a polymict breccia of fragmental feldspathic and mafic lithologies, as well as fragmental pyroxene, olivine, plagioclase grains, and shock melt.

 

Geochemistry: (C. Agee, UNM) Olivine Fa: 31.7±6.3, Fe/Mn=92±9, n=10; clinopyroxene Fs32.2±10.8Wo212.9±8.2 [sic], Fe/Mn=54±8, n=12; plagioclase An96.7±0.8, n=7; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=43.6±0.8, TiO2=0.19±0.13, Al2O3=27.6±5.0, Cr2O3=0.12±0.08, MgO=6.7±4.4, FeO=4.3±2.9, MnO=0.06±0.04, CaO=15.7±2.3, Na2O=0.34±0.13, K2O=0.09±0.05 (all wt%), n=6.

 

Classification: Lunar feldspathic breccia.

 

Specimens: 43.15 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.

         

Randy Says…

I don’t have a sample of this one.

 

More Information

Meteoritical Bulletin Database

NWA 11789

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: 29 May 2018