Study on the metallogenic chronology of gold deposits in Jiaodong gold concentration zone

Metallogenic ages of gold deposits in Jiaodong gold concentration zone range from 153.8 to 80.6 Ma after screening, which is obtained by domestic and abroad authors with various isotope dating methods, such as Rb-Sr, K-Ar and Ar-Ar method for altered minerals, Rb-Sr isochron dating for fluid inclusions, Ar-Ar for quartz and Rb-Sr isochron for ore-mineral et al. Combined with the K-Ar,Ar-Ar dating and SHRIMP zircon U-Pb method dating data of granitoid plutons and dyke rocks which closely related gold mineralization in temporal and spatial, the age of major ore-forming stage of gold deposits in Jiaodong gold concentration zone (105～125 Ma) is affirmed. The age of Au, Ag and polymetallic ore deposits is 90～80 Ma, that is later Lower Cretaceous (K 2 1) and early Upper Cretaceous (K 1 2) of Mesozoic.