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Lunar Meteorite

Northwest Africa 10823

northwestern Africa

 

lm_nwa10823_10.36g_SArnold_As.jpg

lm_nwa10823_18.40g_SArnold_As.jpg

Two slices of Northwest Africa 10823. Click on image for enlagement.
(photo credit: Steve Arnold)

 

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10823

(Northwestern Africa)
Purchase: 2016
Mass: 202 g

Lunar meteorite (feldspathic breccia)

History: Reportedly found in Western Sahara. Purchased by Steve Arnold from a Moroccan meteorite dealer in 2016.

Physical characteristics: Two identical appearing stones, weathered exterior with no fusion crust. Saw cuts reveal a polymict, feldspathic breccia with numerous white feldspar clasts, many in the range 1-5 mm, set in a dark gray matrix. There are also scattered cm-sized feldspathic clasts present. Some dark-colored domains have only sparse, fine grained, feldspathic clasts.

Petrography: (C. Agee, UNM) This meteorite is a mixture of domains with fine-grained groundmasses of pyroxene+olivine+plagioclase+opaques. Large fragmental plagioclase grains were observed throughout, shock melt veins are also present.

Geochemistry: (C. Agee and M.Spilde, UNM) olivine Fa47.7±9.5, Fe/Mn=95±7, n=11; pigeonite Fs41.9±9.8Wo4.9±3.3, Fe/Mn=61±8, n=12; augite Fs24.9±14.2Wo37.5±6.8, Fe/Mn=61±13, n=10; plagioclase An95.8±0.6Ab4.0±0.6Or0.2±0.1, n=7.

Classification: Lunar (feldspathic breccia).

Specimens: 20.02 g including a probe mount on deposit at UNM, Steve Arnold holds the main mass.

 

Randy Says…

I haven’t analyzed this one yet.

 

More Information

Meteoritical Bulletin Database

NWA 10823

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: 26-January-2017