A Study on Ore Features and Gold Occurrence State of the Sandaowanzi Gold Deposit

The Sandaowanzi gold deposit is a mesothermal-epithermal volcanogenic gold deposit which located in the DaHinggan Mountain metallogenic belt of Yanshanian epoch.Mineralization is mostly hosted within quartz veins.The ore textures include automorphic-hypautomorphic-xenomorphic granular,cataclastic,metasomatic and poikilitic.The ore structures mainly show massive,disseminate,brecciated and veinlet.At shallow depth the gold occurs as fine grained native gold and electrum,and distributes in fissures,intergranular or as inclusions.Main.At deep part the gold and silver appear as gold-bearing tellurides in fissures or intergranular.It shows that the ore-forming fluids are different during different formation phases and different levels.