Mineralogical and metallurgical study of supergene ores of the Mike CuAu(Zn) deposit, Carlin trend, Nevada

Post-leaching QEMSCAN analysis indicates that conichalcite and Cu-bearing Fe oxides failed to dissolve completely in all reagents and were the principal causes of low recovery. In addition, native Cu dissolved only partly in thiourea, and chrysocolla dissolved only partly in thiourea, glycine, or cyanide. Other observed mineralogical changes include the total loss of dolomite and partial loss of alunite and iron oxide from all samples, with apparent gains in alunite and jarosite.