Fig. 6

Pseudo-bulk compositions of the sections, re-normalised to 100 wt.% after exclusion of eventual quartz inclusions and leftovers of polishing powder (Additional file 1 for raw values), colour-coded for their Pb content. In grey chemical compositions of other polymetallic copper alloys of the Chalcolithic Southern Levant [27]. a The sum of the main alloying elements plotted against the copper concentration of the samples, (b) As against Sb, and (c) Sb/As against Pb/As ratios. Concentrations of 0 wt.% denote elements absent in the pseudo-bulk compositions of the sections