Lunar Meteorite: Northwest Africa 11828

NWA 8046-clan pair?

Three of the Northwest Africa 11828 stones. Photo credit: Cometshopnew
Three of the Northwest Africa 11828 stones. Photo credit: Cometshopnew
A slice of NWA 11828 on ebay. Photo credit: Nick Gessler

from The Meteoritical Bulletin, No. 107

Northwest Africa 11828 (NWA 11828)

(Northwest Africa)
Find: 2017
Mass: 5340 g (several pieces)

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 Northwest Africa 11828. It may be another pair of the NWA 8046 clan.

More Information

Meteoritical Bulletin Database

NWA 11828