The Meteoritical Bulletin, No.
Northwest Africa 11828
meteorite (feldspathic breccia)
Stones were acquired from a Moroccan dealer in 2017.
characteristics: A group of dark- and
light-gray stones with no fusion crust.
S. Demidova and D. Badyukov,
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
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.
Lunar, feldspathic regolith breccia
23 type specimens of 662.5 g, and a thin section, Vernad, the main mass with an