the next large epithermal deposit + map, page-5

Depends on what the copper hosting mineral is.
Copper is one of the chalcophilic elements - which means sulfur loving.
However Chalcopyrite is still classed as a common mineral even for the low sulfidation deposits.
There is a beaut little pdf that has some good info on the two the types.

http://www.geology.wisc.edu/~pbrown/g515/web09/EpithermalAu.pdf