Fig. 2: Petrography and mineral chemistry of the Chang’e-5 basalt clasts.
From: Non-KREEP origin for Chang’e-5 basalts in the Procellarum KREEP Terrane
a, Backscattered electron image of Chang’e-5 basalt clast 041GP, 001. Cpx, clinopyroxene; Ilm, ilmenite; Pig, pigeonite; Pl, plagioclase; Ol, olivine; Spl, Spinel; Tro, troilite. b, Mg# versus TiO2 diagram of the Chang’e-5 basalt clasts. The Apollo and Luna data are from Clive Neal’s Mare Basalt Database (https://www3.nd.edu/~cneal/Lunar-L/). c, Quadrilateral diagram of pyroxene in the Chang’e-5 basalt clasts. Temperature contours33 calculated at 0.5 GPa are shown, where 0.5 GPa was chosen according to the possible pressure range for lunar low-Ti basalts34. The Apollo 12 samples35 are plotted (grey area) for comparison. Di, diopside; En, enstatite; Fs, ferrosilite; Hd, hedenbergite. d, Comparison of olivine compositions in Chang’e-5 basalts with those within the Apollo 12 and Apollo 15 basalts36. The data for pyroxene and olivine are provided in Supplementary Table 1.
