Lunar Meteorite

Northwest Africa 11886

northwestern Africa


Two photos of my lab sample of NWA 11886. Thanks to Luc Labenne for the sample.
(photo credit: Randy Korotev)


from The Meteoritical Bulletin, No. 107


Northwest Africa 11886


Northwestern Africa

Find: 2018

Mass: 36 g


Lunar Meteorite (fragmental breccia)


History: Bought in Erfoud, Morocco, in March 2018.


Physical characteristics: Cut surface reveals a gray interior with light grey and white clasts.


Petrography: (J. Gattacceca, CEREGE) Igneous fragmental breccia. Main minerals are pyroxene and plagioclase with typical grain size of 300 μm. Other minerals include olivine, chromite, troilite, silica polymorph (to 200 μm), ilmenite, rare metal.


Geochemistry: Pyroxene Fs44.4±6.0Wo22.9±9.0, FeO/MnO=67.3±12.4 (N=5). Plagioclase An92.7Ab7.2Or0.1 (N=2). Olivine Fa87.8, FeO/MnO=109 (N=1).


Classification: Lunar, fragmental breccia


Specimens: 7.5 g at CEREGE. Main mass with Labenne


Randy Says…

This is a unique basaltic breccia with 21% FeO. It contains little or no material from the feldspathic highlands and is apparently derived from a basalt that is moderately rich in incompatible elements (e.g., 16.5 ppm Sm and 2.7 ppm Th).


More Information

Meteoritical Bulletin Database

NWA 11886




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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.



Last revised: 5 March 2019