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Lunar Meteorite

Northwest Africa 11523

northwestern Africa

 

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11523

 

(northwestern Africa)

Purchased: 2017 March

Mass: 3362 g

 

Lunar meteorite (feldspathic breccia)

 

History: Purchased in March 2017 from Aziz Habibi in Erfoud, Morocco.

 

Physical characteristics: Single stone. A saw cut reveals a breccia dominated by white feldspathic clasts set in a dark-gray groundmass, some desert caliche is present along cracks.

 

Petrography: (C. Agee, UNM) Microprobe examination shows fragmental breccia of olivine, pyroxene, and plagioclase. Melt veins and vesicles are present throughout. Augite and pigeonite show subparallel iron-enrichment trends. There appears to be only one population of augite and pigeonite pairs suggesting that this is a monomict breccia. Plagioclase is uniform in composition at 98.5±0.2% anorthite. Ubiquitous minor ilmenite, chromite, and Fe-Ni metal were observed.

 

Geochemistry: (C. Agee, UNM) Olivine Fa26.2±7.1, Fe/Mn=89±5, n=9; pigeonite Fs32.6±5.5Wo6.5±4.1, Fe/Mn=60±5, n=8; augite Fs26.6±8.6Wo36.4±4.6, Fe/Mn=55±8, n=8; plagioclase An98.5±0.2Ab1.4±0.2Or0.1±0.0, n=8; shock melt vein (proxy for bulk composition) SiO2=43.3±0.7, TiO2=0.16±0.03, Cr2O3=0.10±0.05, Al2O3=25.9±3.6, MgO=8.7±4.2, FeO=6.0±2.3, MnO=0.07±0.02, CaO=15.0±2.1, Na2O=0.30±0.07, K2O=0.03±0.01 (all wt%), n=5.

 

Classification: Lunar, monomict feldspathic breccia

 

Specimens: 20.6 g on deposit at UNM, DPitt holds the main mass.

 

Randy Says…

 

I don’t have a sample of this.

 

More Information

Meteoritical Bulletin Database

NWA 11523 

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 that
you’ve found until you read this and this.

 

e-mailkorotev@wustl.edu

Last revised: 28 January 2018