The Meteoritical Bulletin, No.
Northwest Africa 11266
Meteorite (feldspathic breccia)
Purchased by Ke Zuokai
in Feb. 2017 from a Moroccan dealer.
characteristics: The meteorite has a black
fusion crust. Small white clasts are visible.
(Wu Y., PMO) Lithic clasts and
mineral fragments (0.1 to 1.1 mm) set in a fine-grained anorthositic
matrix. The lithic clasts has a gabbroic, anorthositic, or minor noritic
composition. Mineral fragments are dominated by anorthite and pyroxene
grains with minor olivine. Some pigeonite grains exhibit exsolved lamella
of augite. Vesicles occur in the matrix and some clasts. Other accessory
minerals include chromite, ilmenite and troilite.
An95.7-97.9Or0.01-0.3 (average: An96.8±0.6Or0.1±0.1,
n=16); Olivine Fa0.9-31, Fe/Mn (cation ratio) = 92.9-116.3
(average=98.2±8.6); pigeonite Fs19.9-46.6Wo6.2-18.0;
minor orthopyroxene Fs33.1-47.9Wo1.9-3.1 and augite
Fs11.4-52.4Wo28.8-41.8, pyroxene Fe/Mn (cation ratio)
= 47.0-68.4 (average=58.4±6.0).
Lunar feldspathic breccia classification based on texture and composition.
15 g at PMO; remainder with Mr. Ke Zuokai.