THE CHARACTRISTICS OF VEIN ROCKS AND RELATIONSHIP WITH GOLD METALLOGENISM IN HAIGOU GOLD ORE AREA,JILIN PROVINCE

Vein rocks are well developed in Haigou gold ore field,Jilin Province. The main rock types are dioritic porphyrite,subandesite,lamprophyre and syenodioritic porphyry. The vein rocks can be divided into two types,one emplaced before ore veins,and the other after the ore veins. Geochemical characteristics of vein rocks show obvious evolution relationship,since they were derived from the same source. They not only have closely temporal relationship with gold ore,but also provide space,ore-forming fluids,and ore-forming materials for gold ore.