The Meteoritical Bulletin, No. 105
Purchased: November 2016
Mass: 2245 g
lunar, anorthositic impact melt breccia
History: Purchased by Ke Zuokai in Nov. 2016 from a
characteristics: A single stone lacking fusion crust. The section of stone looks gray
and the stone has a dark yellow surface. Small white clasts are visible in
a pale, finer grained matrix.
Lithic clasts and mineral fragments (0.15 to 2 mm) set in a poorly
recrystallized anorthositic matrix. The lithic clasts are impact melt
clasts and rocks of anorthositic, gabbroic, noritic, and troctolitic
composition. Mineral fragments are dominated by pyroxene grains and minor
olivine. Some pyroxene grains exhibit exsolved lamella composed of augite
Fs23.5Wo40.4 and pigeonite Fs43.6Wo10.3.
Vesicles occur in the matrix or some clasts with skeletal crystals. Other
accessory minerals include chromite, spinel, ilmenite and troilite. The
meteorite is moderately weathered with clay minerals filled in irregular
Geochemistry: Plagioclase (An95.9±1.7Or0.3±0.3,
n=21), olivine (FeO/MnO = 83.2-116.5), pyroxene FeO/MnO = 43.9-73.6.
Lunar, anorthositic impact melt breccia.
g is on deposit at PMO,
holds the main mass.