No so good as gold, page-2

this guy his knowledge is limited about Gold and Copper found together .
For delta it isn’t problem, Gold and copper are often found together in nature, but they have different physical and chemical properties that allow them to be separated. One method for separating the two metals is called froth flotation. This process involves grinding the ore into a fine powder and adding a frothing agent, which causes the gold and copper minerals to bind to air bubbles. The bubbles with the gold and copper minerals attached are skimmed off the top of the mixture, while the other minerals sink to the bottom. Another method is called gravity separation, which uses differences in density to separate the two metals. This method is typically used for ores that have a high concentration of one metal and a low concentration of the other.It is important to note that different methods will be used depending on the specific characteristics of the ore and the desired end product. The best method will also depend on the specific mine and the composition of the ore. It is best to consult with a metallurgical engineer or mineral processing expert to determine the best method for your specific case.
Gold and Copper are often found together in nature, It is best to consult with a metallurgical engineer or mineral processing expert to determine the best method for your specific case and it isn’t an issue at all .