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Lunar Meteorite

Northwest Africa 12248

northwestern Africa

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 12248

 

Mauritania

Purchased: 2018

Mass: 37.3 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Found in Mauritania and purchased by Darryl Pitt in May 2018 from a Mauritanian dealer.

 

Physical characteristics: A small (37.3 g) dark stone lacking fusion crust but coated by a shiny desert patina. The fresh interior contains small white and beige clasts set in a dark-gray matrix.

 

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of mineral clasts of anorthite, olivine, low-Ca pyroxenes, augite, ilmenite and troilite in a fine grained matrix containing Ni-poor metal and minor barite.

 

Geochemistry: Olivine (Fa44.5, FeO/MnO = 105; Fa13.1, FeO/MnO = 54; N = 2), low-Ca pyroxene (Fs38.2Wo4.5, FeO/MnO = 59), pigeonite (Fs32.0-32.5Wo14.6-9.7, FeO/MnO = 55-62, N = 2), augite (Fs22.4Wo43.1, FeO/MnO = 51), anorthite (An94.3-95.9Or0.2, N = 2).

 

Classification: Lunar (feldspathic breccia).

 

Specimens: 9.5 g including one polished thin section at UWB; remainder with DPitt.

 

Randy Says…

I have not studied this one.

 

More Information

Meteoritical Bulletin Database

NWA 12248

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: 3 December 2018