The Jiedaishan Pb-Zn deposit is located in the Pb-Zn metallogenic area of southern Anhui Province.In this paper,petrography and zircon U-Pb chronology have been carried out on the Jiedaishan granodiorite porphyry ore-bearing intrusive rocks.The zircon U-Pb age is 136.4±1.4 Ma,formed in the Early Cretaceous,and is the product of late Yanshan magmatic activity.The relatively low crystallization temperature and relatively moderate oxygen fugacity of granodiorite porphyry are conducive to lead-zinc precipitation mineralization.
In South Anhui Provincelead zinc oreore-forming intrusive rockszircon U-Pb chronology