Study of tin and copper metallogenetic fluid from Dajing deposit and its genetic significance.

Two kinds of fluid inclusions in fluorite were recognized in Dajing deposit , i. e, tin-bearing intermediate to high temperature and copper-bearing low temperature ones. The relationship between homogenization temperature and salinity indicates that they belong to two fluid systems rather than evolve d from one kind of fluid, which holds the same conclusion from classificati on for mineralization stages. It suggests that tin and copper could be form ed in independent mineralization, and the tin-copper mineralizations in the Dajing deposit might formed in same place but might come from different me tallogentic fluids source. The discovery and study of these two kind fluids inclusions have important significance for trace the source and evolusion of different kinds of fluids and it might provide some new evidences for th e genesis of Dajing deposit and prospecting around the mine.