论蔡家营多金属矿床成矿元素分带

Discuss of Ore- forming El ements Bel ding Feature in theCaijiaying Polymetallic Deposit

蔡家营矿床主要由Ⅲ、Ⅴ两矿带组成，从东北（Ⅲ矿带）往西南（Ⅴ矿带），Ｚｎ／Ｐｂ比值降低，Ａｇ含量增高。两矿带地质产状一致，硫、铅等成矿物质来源一致，形成于统一的地质作用。导致成矿元素分带的主要原因是两矿带成矿物理化学环境的差异。

deposit is mainly composed of belt Ⅲ and belt V.From the northeast(beltⅢ)to the southwest(belt V),Zn/pb val-ues drop and Ag contents increase,In beltⅢ and belt V,their geological feature and S,Pb ect.Ore- forming elements source are thesame.The main reason causing ore- forming elements belting feature is difference of their ore- forming physicochemical conditions.