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 cracks.
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.