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Lunar Meteorite

Northwest Africa 11127

northwestern Africa

 

lm_nwa11127_3371m.jpg

Lab sample of NWA 11127.  Click on image for enlargement.
(photo credit: Randy Korotev)

 

from The Meteoritical Bulletin, No. 106

 

Northwest Africa 11127

 

(Northwestern Africa)

Found 2015; Purchased: 2016 April

Mass: 474.6 g

 

Lunar Meteorite (feldspathic breccia)

 

History: Purchased by Darryl Pitt in April 2016 from a dealer in Mauritania.

 

Physical characteristics: A single stone (474.6 g) lacking fusion crust and consisting of diffuse white to pale brownish clasts in a medium gray, very fine-grained matrix containing small vesicles.

 

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of lithic clasts and angular mineral grains of anorthite, olivine, orthopyroxene, pigeonite and exsolved pigeonite with accessory kamacite, Ti-chromite, ilmenite and minor troilite in a sparse finer grained, partly devitrified matrix (exhibiting "swirly" texture). The majority of the lithic clasts are fine grained melt rocks. Veinlets of shock glass plus secondary calcite and minor barite are present.

 

Geochemistry: Olivine (Fa8.9-45.0, FeO/MnO = 74-79, N = 3), orthopyroxene (Fs20.9Wo4.6, FeO/MnO = 64), pigeonite (Fs40.9Wo19.2, FeO/MnO = 56), high-Ca pyroxene host (Fs17.3Wo41.1, FeO/MnO = 79), low-Ca exsolution lamella (Fs36.4Wo5.3, FeO/MnO = 61), plagioclase (An96.4-96.5Or0.2, N = 2). Bulk composition (R. Korotev, WUSL) INAA of subsamples gave the following mean abundances (in wt.%) FeO 3.7, Na2O 0.34; (in ppm) Sc 14.5, Ni 90, La 4.4, Sm 1.76, Eu 0.75, Yb 1.5, Lu 0.22, Hf 1.4, Th 0.57.

 

Classification: Lunar (feldspathic breccia).

 

Specimens: 20.6 g including one polished thin section at UWB; remainder with DPitt.

         

Randy Says…

This meteorite may be paired with NWA 10626.

 

More Information

Meteoritical Bulletin Database

NWA 11127

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 you've found until you read this and this.


e-mail
korotev@wustl.edu

Last revised: 27-March-2017