Invisible gold

Resumo

The problem of invisible gold has acquired global importance because, in many countries, large deposits of disseminated sulfide ores with refractory properties are the main potential source of gold production. The involvement of new gold sulfide deposits with refractory “invisible” gold in operation, in the authors' opinion, will increase and stabilize the level of gold mining in Russia until the end of the current century, because it is possible to extract annually 5–25 t of gold at each deposit for decades.