The formation of Fangniugou polymetallic deposit is unrelated obviously and directly with volcanic activity of the terminal stage of Eealy Paleozoic.

• 放牛沟多金属矿床的形成与早元古代晚期的火山作用无明显的直接联系,矿床和华力西早期后庙岭花岗岩具有共同的物质来源。