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Lunar Meteorite

Northwest Africa 11851

Mali

 


 

Two views of Northwest Africa 11851. Click on image for enlargement. 
(photo credit: ?)

 

Lab sample of NWA 11851. Click on image for enlargement. 
(photo credit: Randy Korotev)

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 11851

 

Mali

Purchased: 2018 March

Mass: 227 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Found in the Azawad region of northern Mali and purchased by Habib Naji in March 2018.

 

Physical characteristics: A fine grained, medium gray stone (227 g) with macroscopically indistinct clasts; partly coated by light brown weathering products.

 

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Polymict breccia consisting of small mineral clasts (anorthite, olivine, pigeonite, augite, orthopyroxene, ilmenite, Ti-Cr-Mg-Al spinel, troilite, merrillite, kamacite) and small lithic clasts (including gabbroic lithologies and quench-textured melt rocks) in a finer grained matrix.

 

Geochemistry: Olivine (Fa17.8-23.5, FeO/MnO = 90-127, N = 3), orthopyroxene (Fs16.1Wo3.8, FeO/MnO = 53), pigeonite (Fs25.4-37.2Wo8.1-13.0, FeO/MnO = 54-60, N = 3), augite (Fs44.1Wo35.6, FeO/MnO = 62), plagioclase (An95.5-95.7Or0.5-0.3, N = 2).

 

Classification: Lunar (feldspathic breccia).

 

Specimens: 22 g including one polished thin section at UWB; remainder with Mr. H. Naji.

 

Randy Says…

This one appears to be unpaired with any other.

 

More Information

Meteoritical Bulletin Database

NWA 11851 

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: 26 July 2018