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Lunar Meteorite

Northwest Africa 10253

northwestern Africa

 

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One of the NWA 10253  stones
(photo credit: Darryl Pitt)

 

Lab sample of NWA 10253. Click on image for enlargement. Thanks to Carl Agee for the sample.
(photo credit: Randy Korotev)

 

from The Meteoritical Bulletin, No. 104

Northwest Africa 10253

Northwestern Africa
Purchased: 2015
Mass: 6674.1 g

Lunar meteorite

History: Purchased by Darryl Pitt from a Moroccan meteorite dealer, reportedly found in Mauritania near the Algerian border.

Physical characteristics: Weathered irregular exterior. Saw cuts reveal a fragmental breccia with numerous feldspathic and mafic clasts set in a gray groundmass.

Petrography: (C. Agee, UNM) This meteorite is a very heterogeneous polymict breccia consisting of numerous microgabbro clasts, shock melt pools and veins, fragmental plagioclase, pyroxene, and olivine. Accessory Fe-oxide, troilite, Ti-chromite, ilmenite, and silica were observed. Thin calcite weathering veins are present.

Geochemistry: (C. Agee and N. Muttik, UNM) olivine Fa38.3±2.7, Fe/Mn=102±5, n=14; pigeonite Fs39.9±14.7Wo12.7±5.5, Fe/Mn=63±9, n=14; augite Fs42.7±14.2Wo27.0±7.9, Fe/Mn=69±11, n=10; anorthite plagioclase An95.3±1.8Ab4.4±1.7Or0.2±0.1, n=6; labradorite plagioclase An55.5Ab43.2Or1.3, n=1; Shock melt (10 µm defocused electron beam, proxy for bulk meteorite composition): SiO2=46.1±1.6, TiO2=0.63±0.46, Al2O3=23.1±4.8, Cr2O3=0.16±0.09, MgO=6.8±3.5, FeO=7.1±3.2, MnO=0.09±0.05, CaO=14.0±2.0, NiO=0.03±0.03, Na2O=0.55±0.21, K2O=0.12±0.08 (all wt%), Fe/Mn=81±23, Mg#=61±8, MgO+FeO=13.9±6.0 (wt%), n=31.

Classification: Lunar feldspathic breccia

Specimens: 32.5 g including a probe mount on deposit at UNM, DPitt holds the main mass.

 

Randy Says…

I’ll be analyzing my sample soon.

 

More Information

Meteoritical Bulletin Database

NWA 10253

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: 30-March-2017