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Lunar Meteorite

Northwest Africa 10643

northwestern Africa

 

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Two views of Northwest Africa 10643
(photo credit: Jean Redelsperger)

 

from The Meteoritical Bulletin, No. 105

Northwest Africa 10643

(Northwest Africa)
Purchased: 2016
Mass: 43.56 g

Lunar meteorite (feldspathic breccia)

History: Purchased from Jaouad Chaoui in Marrakesh, Morocco, December 2015; reportedly found in Mauritania.

Physical characteristics: Single stone, weathered exterior without fusion crust; broken surface reveals numerous white feldspathic clasts set in a dark-gray groundmass.

Petrography: (C. Agee, UNM) This is a highly feldspathic breccia with primarily magnesian olivine (Fa20) and pyroxene fragments scattered throughout. Minor amounts of more iron-rich olivine (Fa41) and pigeonite (Fs66Wo23) were detected. Vesicular shock melt veins and pockets are also present.

Geochemistry: (C. Agee and S. Spilde, UNM) Olivine Fa20.0±2.0, Fe/Mn=84±6, n=12; pigeonite Fs33.5±8.9Wo9.4±8.6, Fe/Mn=63±11, n=10; augite Fs22.9±2.3Wo40.1±0.8, Fe/Mn=58±5, n=2; plagioclase An97.0±0.5, n=5; Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=44.5±0.7, TiO2=0.15±0.07, Al2O3=30.7±2.7, Cr2O3=0.06±0.04, MgO=5.2±1.9, FeO=2.9±1.1, MnO=0.04±0.00, CaO=17.0±1.0, NiO=0.01±0.01, Na2O=0.37±0.02, K2O=0.03±0.01 (all wt%), n=3.

Classification: Lunar (feldspathic breccia).

Specimens: 8.8 g including a probe mount on deposit at UNM; Jean Redelsperger holds the main mass.

 

Randy Says…

This one may be paired with another. I don’t have a sample yet.

 

More Information

Meteoritical Bulletin Database

NWA 10643

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: 18-May-2016