The Paishanlou monzogranite stock is outcropped in the vicinity of the Paishanlou gold deposit. LA-ICP-MS zircon U-Pb dating yields absolute age of (128±1.3) Ma indicating the stock was emplaced during late Yanshanian, Cretaceous, during which a lithospheric extensional regime was prevailing in the region. Also based on the close spatial and temporal relations between the monzogranite and ore-hosting ductile shear zones, with considering the intimate connections among regional thermal-tectonic events and mineralization, it is suggested that the emplacement of the monzogranite stock may probably genetically be related to the ore-hosting ductile shearing nearby to the south by the regional extensional tectonism during Late Yanshanian.