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Lunar Meteorite

Northwest Africa 10902

northwestern Africa

 

lm_nwa10902_ST_1.48g_bm.jpg
lm_nwa10902_ST_1.48g_am.jpg 

Northwest Africa 10902. Click on image for enlargement.
(photo credit: Sean Tutorow)

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10902

(Northwest Africa)
Purchased: 2015
Mass: 36.28 g

Lunar meteorite

History: Purchased in 2015 by Brahim Tahiri in Morocco and sent to his partner Sean Tutorow for analysis.

Physical characteristics: Two identical appearing stones, irregular exterior, no fusion crust. A saw cut reveals scattered light-gray feldspathic clasts set in a very dark groundmass.

Petrography: (C. Agee, UNM) This is a polymict breccia showing several different textural domains: 1) basaltic clasts with phenocrysts and quench crystals, 2) zones of fragmental plagioclase, olivine, and pyroxene, 3) cataclastic zones of fine-grained silicates, 4) shock melt veins and pockets.

Geochemistry: (C. Agee and S. Spilde, UNM) Olivine Fa43.1±1.1, Fe/Mn=100±3, n=4; pigeonite Fs41.0±8.0Wo16.7±5.7, Fe/Mn=59±5, n=9; augite Fs29.5Wo44.1, Fe/Mn=60, n=1; plagioclase An95.9±0.8, n=4; Shock melt (proxy for bulk meteorite composition): SiO2=44.2±0.7, TiO2=0.36±0.07, Al2O3=24.6±1.5, Cr2O3=0.19±0.04, MgO=8.5±1.0, FeO=8.3±1.0, MnO=0.11±0.02, CaO=13.7±0.7, NiO=0.06±0.05, Na2O=0.36±0.06, K2O=0.10±0.03 (all wt%), n=9.

Classification: Lunar meteorite. Intermediate breccia based on FeO and Al2O3 content.

Specimens: 7.4 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

 

Randy Says…

I have not analyzed this one yet.

 

More Information

Meteoritical Bulletin Database

NWA 10902

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 you've found until you read this and this.


e-mail
korotev@wustl.edu

Last revised: 09-February-2017