The Fuwan superlarge silver deposit is hosted in the Early Carboniferous limestones along a contact fault zone between the limestone and the overlying Changkeng Au-hosting siliceous rocks.

• 富湾超大型银矿床主要为脉状,产于下石炭统灰岩与长坑赋金硅质岩接触带及其下的破碎带中。