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Lunar Meteorite

Northwest Africa 12428

northwestern Africa

 

from The Meteoritical Bulletin, No. 108

 

Northwest Africa 12428

 

northwestern Africa

Find: 2017 October

Mass: 2070 g

 

Lunar Meteorite (Lunar meteorite (feldspathic breccia))

 

History: Purchased in November 2017 in Nouakchott, Mauritania. Reportedly found in Algeria near the northern Mali border region, October 2017.

 

Physical characteristics: Single stone, no fusion crust; saw cut reveals a breccia with scattered light-colored clasts set in a predominantly dark gray groundmass.

 

Petrography: (C. Agee, UNM) Microprobe examination shows fragmental breccia with many diverse clasts set in fine-grained, cataclastic groundmass. Melt veins and vesicles are present throughout.

 

Geochemistry: (C. Agee, UNM) Olivine Fa23.5±14.5, Fe/Mn=102±20, n=9; clinopyroxene Fs25.4±12.0Wo11.0±11.1, Fe/Mn=55±7, n=21; plagioclase An96.5±0.3, n=14; shock melt veins (proxy for bulk composition) SiO2=46.1±1.2, TiO2=0.25±0.15, Cr2O3=0.16±0.08, Al2O3=24.3±2.5, MgO=9.6±2.9, FeO=6.3±2.7, MnO=0.09±0.03, CaO=13.7±1.0, Na2O=0.38±0.11, K2O=0.10±0.06 (all wt%), n=4.

 

Classification: Lunar, feldspathic breccia

 

Specimens: 23.8 g on deposit at UNM, DPitt holds the main mass.

 

Randy Says…

I have not studied this one.

 

More Information

Meteoritical Bulletin Database

NWA 12428

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: 11 February 2019