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Lunar Meteorite

Northwest Africa 11474

northwestern Africa

 

Three of the Northwest Africa 11472 stones
(photo credit: Mendy Ouzilou)

 

Sawn face of an NWA 11472 stone
(photo credit: Dustin Dickens)

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11474

 

(northwestern Africa)

Purchased: 2017 May

Mass: 586 g

 

Lunar meteorite

 

History: Purchased by Dustin Dickens and Mendy Ouzillou from a Mauritanian meteorite dealer May 10, 2017.

 

Physical characteristics: Many identical appearing pieces, no fusion crust. A saw cut reveals a fragmental breccia with numerous white feldspathic clasts set in a dark-gray ground mass.

 

Petrography: (C. Agee, UNM) This meteorite consists of primarily feldspathic clasts and shock melt with lesser amounts of fragmental pyroxene and olivine.

 

Geochemistry: (C. Agee and B. Ha, UNM) olivine Fa19.3±0.6, Fe/Mn=86±1, n=2; pigeonite Fs24.8±0.5Wo4.3±0.3, Fe/Mn=60±9, n=2; high Ca pyroxene Fs27.4Wo34.4, Fe/Mn=58, n=1; plagioclase An97.8±0.7Ab2.0±0.6Or0.2±0.1, n=6; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=44.4±0.8, TiO2=0.21±0.01, Al2O3=27.5±1.1, Cr2O3=0.07±0.02, MgO=5.7±1.4, FeO=4.2±1.3, MnO=0.07±0.02, CaO=16.2±0.5, Na2O=0.42±0.04, K2O=0.01±0.02 (all wt%), Fe/Mn=63±1, Mg#=70.1±1.1, n=3.

 

Classification: Lunar feldspathic breccia

 

Specimens: 20 g including a probe mount on deposit at UNM, Dustin Dickens and Mendy Ouzillou hold the main mass.

 

Randy Says…

 

I don’t have a sample of this one. It might be an NWA 8046 pair, but Fa19.3±0.6 is low.

 

More Information

Meteoritical Bulletin Database

NWA 11474 

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: 18 December 2018