Ore-forming geochemistry of the Duobaoshan copper deposit, Heilongjiang Province, China

The Duobaoshan copper deposit lies in Nenjiang County, Heilongjiang Province. As the largest porhpyry copper deposit in the northeast of China, its reserves reach the standard of a superlarge deposit. In this deposit, wall rock hosts most of the Cu. The formation process of this deposit can be divided into 5 geochemical stages: 1) The main ore-forming stage of Cu mineralization accompanied by enrichment of Mo, F and K2O, and depletion of Na2O, 2) a stage of Pb and Zn mineralization accompanied by enrichment of Ba, Bi and depletion of Nb; 3) a stage of hydrothermal solution activity accompanied by enrichment of Bi, Sr, Ni, and W and depletion of TiO2 and P2O5; 4) a stage of small scale Mo mineralization accompanied by enrichment of SiO2 and As; and 5) carbonization caused the depletion of Ta, Al2O3 and SiO2.