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Fig. 1 Comparison between measured concentrations (%, in mass) of In, Cd, Se and Te using LA-ICP-MS and EPMA for Fe-rich sulfides. Left panels show the LA-ICP-MS concentrations of compiled and new sulfide analyses obtained using Fe as the internal standard. The coarse dashed lines in left panels represent fits to Fe-rich sulfides obtained in this study (Table 2). Left panels include previously obtained measurements for S-poor Fe-rich metal alloys;26 fine dashed lines in left panels represent derived Fi trends for the latter data.26 Right panels show a comparison of the measured concentrations by LA-ICP-MS (this study only) using Fe, Ni or Cu as the internal standard. Solid lines in left and right panels are 1 : 1 identity lines plotted for reference. Horizontal and vertical error bars in left and right panels represent 2 standard errors.