吉林石井金银矿床地质特征及成因探讨

石井金银矿床赋存在侏罗系屯田营组火山岩、火山碎屑岩中，由2条金银矿化带和14条矿（化）体组成，受断裂控制明显，矿化主要富集作用与火山热液活动有关。在中生代的中-低温火山-次火山热液环境下，含金、银等成矿热液受热动力和沸腾作用而富集，因降温、减压作用而沉淀富集成矿，成矿物质主要来自于围岩，成因类型为低硫化型浅成低温火山热液型，工业类型为石英脉-破碎蚀变岩型，具有良好的地层、脉岩、构造、矿化蚀变和地球化找矿标志，区域成矿条件有利，找矿潜力较大。

Discussion on the Geological Features and Genesis of Shijing Gold-Sliver Deposit in Jilin Province

Shijing gold-silver deposit,which is lied in Jurassic volcanic and pyroclastic rocks,is composited of two gold and silver mineralization belts,fourteen mine(change) bodies,and is obviously controlled by the fracture structure.The function of enrichment of main mineralization is related with volcanic hydrothermal activity.In middle-low temperature volcanic hydrothermal in the environment of the Mesozoic,gold-silver ore-forming hydrothermal is enriched firstly by heat power and boiling function and then sediment and enrichment because of cooling,reduced pressure.Ore-forming materials mainly comes from the surrounding rock,ore genetic types is low epithermal volcanic hydrothermal,industrial types is quartz vein-broken altered rock.It has good prospecting marks of strata,vein rocks,structure,mineralized alteration,geochemical.It is favorable for regional metallogenic conditions and prospecting potential.