Fig. 4: Observed concentration of Th and Ti around the SPA basin and expected evolution of Th concentration during magma ocean crystallization.
From: Southward impact excavated magma ocean at the lunar South Pole–Aitken basin
a, Concentration of Th as a function of Ti in areas of interest within and around the basin (error bars indicate the 1 and 2 standard error ranges). The west ejecta blanket does not lie on the line encompassing the other three zones. b, Predicted Th concentration as a function of PCS of the magma ocean for assumed trapped melt fractions within the cumulate mantle ranging from 0% to 10%. Constraints from the ejecta of the SPA basin and Imbrium basin are indicated by grey boxes.
