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Lunar Meteorite

Northwest Africa 12216

Algeria

 

from The Meteoritical Bulletin, No. 108

 

Northwest Africa 12216

 

Algeria

Purchased: 2018 May

Mass: 1868 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Found near Wad Alma, Algeria and purchased by Darryl Pitt in May 2018 from a Mauritanian dealer.

 

Physical characteristics: A small (34.4 g) unusually hard, dark-gray stone, mostly very fine grained and vesicular with sparse white clasts.

 

Petrography: (A. Irving and S. Kuehner, UWS) Small mineral clasts of anorthite, low-Ca pyroxene, subcalcic augite and olivine are set in a very fine-grained, vesicular matrix containing ilmenite, Ti-poor chromite, kamacite and troilite.

 

Geochemistry: Olivine (Fa19.9-37.1, FeO/MnO = 80-119, N = 3), low-Ca pyroxene (Fs26.9Wo4.9, FeO/MnO = 53), pigeonite (Fs23.8Wo7.1, FeO/MnO = 50), subcalcic augite (Fs62.6Wo28.7, FeO/MnO = 75; Fs13.3Wo39.1, FeO/MnO = 36), plagioclase (An96.9-97.4Wo0.2-0.1, N = 2).

 

Classification: Lunar (feldspathic regolithic breccia).

 

Specimens: 9.2 g including one polished endcut at UWB; remainder with DPitt.

 

Randy Says…

I have not studied this one.

 

More Information

Meteoritical Bulletin Database

NWA 12216

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: 7 January 2019