Fig. 1: Representative olivine crystal and chemical composition in the Chang’e-5 basalt clasts.
From: Surges in volcanic activity on the Moon about two billion years ago
a–d High-resolution backscattered electron (BSE) image and Fe, Mn, and Al X-ray maps of representative olivine in the Chang’e-5 basalt clast (Z0303-002, 007). d is the enlarged image of the olivine crystal. The olivine grain shows nearly concentric compositional zoning with a core low Fe, low Mn, but Al is almost homogeneous from the core to the rim. Abbreviations: Ol olivine, Pl plagioclase, Cpx clinopyroxene, ilm ilmenite, Spl spinel, MI melt inclusion, Fe iron, Mn Manganese, Al Aluminum. e Frequency distribution of forsterite (abbreviated as Fo) composition [defined as 100 × Mg/(Mg + Fe), mole fraction] based on >400 analyses (this study and ref. 10).
