Fig. 18

Correlation plot of the elemental distributions for gold (Au–L) and copper (Cu–K). In pink, the areas of pure gold (gold I). In green, the areas of gold mixed with copper (gold II)
Correlation plot of the elemental distributions for gold (Au–L) and copper (Cu–K). In pink, the areas of pure gold (gold I). In green, the areas of gold mixed with copper (gold II)