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Lunar Meteorite

Northwest Africa 10901

northwestern Africa

 

lm_10901_6.80g_ST_bm.jpg
lm_10901_6.80g_ST_am.jpg

Two sides of a slice of Northwest Africa 10901. Click on image for enlargement.
(photo credit: Sean Tutorow)

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10901

(Northwest Africa)
Purchased: 2015
Mass: 68.04 g

Lunar meteorite

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

Physical characteristics: Single stone, irregular exterior, no fusion crust. A saw cut reveals light-gray feldspathic clasts (up to 2 cm) and some smaller fragmental white plagioclase grains set in a dark-gray groundmass.

Petrography: (C. Agee, UNM) This is a polymict feldspathic breccia showing several different textural domains: 1) large (centimeter-sized) poikilitic plagioclase with olivine and pyroxene inclusions, 2) zones of fragmental plagioclase, olivine, and pyroxene, 3) cataclastic zones of fine-grained silicates, 4) vesicular shock melt veins and pockets. Iron metal detected, the largest grain observed was ~150 μm in diameter.

Geochemistry: (C. Agee and S. Spilde, UNM) Olivine Fa42.0±13.4, Fe/Mn=98±7, n=6; pigeonite Fs54.7±9.1Wo7.0±2.3, Fe/Mn=63±3, n=5; augite Fs28.7Wo40.3, Fe/Mn=56, n=1; plagioclase An96.6±0.4, n=4; Shock melt (proxy for bulk meteorite composition): SiO2=44.7, TiO2=0.37, Al2O3=24.1, Cr2O3=0.16, MgO=7.2, FeO=7.2, MnO=0.10, CaO=14.7, NiO=b.d.l., Na2O=0.31, K2O=0.02 (all wt%), n=1.

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

Specimens: 13.76 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 10901

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