Fig. 3: Sulfide-undersaturated evolution of lunar mare basalts.
From: Sulfur isotopes from the lunar farside reveal global volatile loss following the giant impact

S (a) and Cu (b) contents in CE-6, CE-5, and Apollo mare basalts plotted against MgO. The sulfur contents at sulfide saturation (SCSS) of the CE-6 basaltic melt (a) was calculated using the silicate sulfur solubility model proposed by Ji and Dasgupta27. S and Cu contents in Apollo 12, 15, and 17 mare basalts45 are highlighted, and the incompatible behavior of S (a) and Cu (b) in these magmas suggests sulfide-undersaturated evolution of most lunar mare basalts. Data source: The S content of CE-5 and Apollo samples are from the refs. 29,39. The Cu content of CE-6, CE-5 are from the literature36,45,72 and Lunar Sample Compendium (https://wwwcurator.jsc.nasa.gov/lunar/lsc/index.cfm).