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Lunar Meteorite

Northwest Africa 11828

northwestern Africa

 

from The Meteoritical Bulletin, No. 107

 

Northwest Africa 11828

 

(Northwest Africa)

Find: 2017

Mass: 5340 g

 

Lunar meteorite (feldspathic breccia)

 

History: Stones were acquired from a Moroccan dealer in 2017.

 

Physical characteristics: A group of dark- and light-gray stones with no fusion crust.

 

Petrography: S. Demidova and D. Badyukov, Vernad): The meteorites are polymict breccias containing numerous mineral fragments and large rounded lithic clasts occurring within a brownish cryptocrystalline to glassy impact-melt matrix; the lithic clast population comprises impact-melt breccias, as well as cataclastic granulitic rocks of anorthositic, noritic, gabbro-noritic and troctolitic compositions; clasts of impact-melt breccias typically show breccia-in-breccia textures; glass fragments and rare spherules are present.

 

Geochemistry: feldspar, An92-98; orthopyroxene, Wo­2-5En60-81; clinopyroxene; Wo5-43En33-69, olivine, Fo22-93 (FeO/MnO = 85); accessory minerals include: ilmenite (2.6-6.2 wt % MgO), Cr-rich ulvöspinel, Ti,Al-rich chromite, silica, Ca-phosphate, armalcolite, baddeleyite, troilite, and abundant FeNi metal; the stones are moderately weathered; carbonate veins and Fe hydroxides are present.

 

Classification: Lunar, feldspathic regolith breccia

 

Specimens: 23 type specimens of 662.5 g, and a thin section, Vernad, the main mass with an anonymous keeper.

 

Randy Says…

I have not studied this one.

 

More Information

Meteoritical Bulletin Database

NWA 11828

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: 18 December 2018