Study on the auriferous minerals and geological characteristics of Daheishan gold deposit, Inner Mongolia

Daheishan gold deposit is a fractured alteration type and quartz vein type gold deposit, hosted in the outer contact zone of Damiao granite. Eight veins have been discovered, while No.27 is the main vein. The deposit is divided into two metallogenic periods and four metallogenic stages. Native gold are mainly hosted in pyrite and quartz. The metallogenic temperature is 260~310℃. Occurrences of native gold are inclusion gold, crystal fractured gold and fissure gold, gold minerals are native gold and electrum. The gold deposit experienced multiphase and multistage mineralization. The deposit is a mesothermal gold deposit mineralized in shallow middle depth.