内蒙古哈达门沟金矿床28号矿脉流体包裹体研究

Petrography and microthermometry were used to study fluid inclusions in No.28 vein of the Hadamengou deposit systematically. It shows that the inclusions of fluid-rich, multiphase with daughter mineral-bearing and CO2-H2O three-phase are three main types of fluid inclusion, a small amount of pure liquid inclusions and pure gas phase inclusions can also be observed, the amount of pure liquid CO2 is the least. The Hadamengou gold deposit belongs to medium-high temperature, medium salinity and medium-density hydrothermal mineralization and formed in the medium-deep ore-forming environment. During the process of gold mineralization, CO2 fluids prompt the gold in source bed being activated and translated into soluble gold and provide important conditions for the complexing migration of the reductive sulfur and gold. The characteristics of ore-forming fluids comparison in both the Hadamengou gold deposit and the Liubagou gold deposit show that they are very similar in the nature and evolution of ore-forming fluid, are common in the source of ore-forming fluids.