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Lunar Meteorite

Northwest Africa 12603

Northwestern Africa

 

from The Meteoritical Bulletin, No. 108

Northwest Africa 12603

(Northwestern Africa)
Purchased: 2018 December
Mass: 47 g

Lunar meteorite (fragmental breccia)

History: Purchased from a Moroccan mineral dealer at the mineral show in Hamburg, Germany.

Petrography: (K. Metzler, IfP) Polymict achondritic breccia, consisting of mineral fragments (olivine, pyroxene, plagioclase) and lithic clasts (anorthosites, melt rocks), set in a nearly black matrix of fine-grained related debris. Intermingled are clast-rich melt particles with ill-defined outlines. Breccia-in breccia clasts and melt spherules occur, as well. Pyroxenes with and without exsolution lamellae are observed. Accessories are ilmenite, troilite, and Fe,Ni metal.

Geochemistry: Mineral compositions and geochemistry: Olivine: Fa35.8±8.8 (26.9-47.3); Fe/Mn (at.): 72-153; n=6. Pyroxene Fs41.6±23.9Wo10.3±5.0 (Fs24.5-83.5Wo3.1-15.8); Fe/Mn (at.): 48-94; n=5. Plagioclase An96.7±0.8 (An95.7-97.5); n=4. Chemistry of a melt spherule (wt%): SiO2=42.6, TiO2=0.6, Cr2O3=0.5, Al2O3=23.7 MgO=9.3, FeO=8.4, MnO=0.08, CaO=14.9.

Classification: Lunar feldspathic breccia.

Specimens: 9.7 g type specimen at IfP. Anonymous buyer holds the main mass.

 

Randy Says…

I have not studied this one. The description is similar to that of NWA 12697.

 

More Information

Meteoritical Bulletin Database

NWA 12603

 

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: 9 July 2019