Fig. 3
Lead isotope ratios of SMS at Kolumbo and potential Pb source rock units (hollow symbols = data from refs31,34, see ESM1). (A) 207Pb/206Pb versus 208Pb/206Pb plot for galena, Sb-Pb sulfosalts and pyrite and potential source rocks. Pb isotope ratios fields for each lithology calculated using 2D Kernel density graphs containing the data within 1σ; (B) Detail of (A) showing the shift of Pb isotope ratios of Kolumbo volcanic rocks to higher 207Pb/206Pb and 208Pb/206Pb ratios during magmatic differentiation (MgO content from ref8; (C) Monte Carlo-based modeling of an assimilation–fractional crystallization (AFC) process of Cycladic Basement at Kolumbo using Rb as an incompatible trace element to estimate magmatic differentiation (see ESM2).
