What about Kalleske wines?I once saw a map of the concentration of copper in the topsoil across Bordeaux.
There has been so much copper used there since the late 19th century as Bordeaux mix (copper sulfate + slaked lime) for fungus control that a geochemist analysing samples without knowing their origin would easily conclude that the sample collector had stumbled on the world's greatest copper-lode.
Copper sulfate approved for organic use in various jurisdictions can be more environmentally problematic than some synthetic fungicides not allowed in organic farming because copper is persistent and toxic above a certain concentration.
Sulfur is also an acceptable fungicide in organic farming. The stench of sulfur in the air in Burgundy in summer is something I will never forget.