Long-distance connections in the Copper Age: New evidence from the Alpine Iceman’s copper axe
Fig 3
2D projections of the measured lead isotope ratios, compared with the available data from the literature [22, 28–32 and literature cited therein].
The two most widely used bivariate plots are shown: (a) 206Pb/204Pb vs 207Pb/204Pb plot; (b) 206Pb/204Pb vs 208Pb/204Pb plot.