Abstract:Northeast China is located in the superposition of Paleo-Asian Ocean and Paleo-Pacific Ocean tectonic domain with complex geo-history and frequently magmatic and tectonic activities. In this contribution, we selected two Jurassic plutons of Dongning and Fudong in Yanbian to study their petrogenesis and metallogenetic potentiality. Dongning granite is featured of high SiO2 and low MgO contents with enrichment in LILEs and LREEs and depleted in HFSEs and HREEs. Combined with depleted Hf isotopic characters（εHf(198.6 Ma)=1.0-6.0）and high zircon saturation temperature, it shows that it formed by the reworking of the low crustal material. Fudong bitotite quartz diorite (173.6±2.8 Ma) possesses different Hf isotopic character with its mafic microgranular enclaves (MMEs) (173.8±7.4 Ma), which shows Fudong rock formed by magmatic mixing of mantle- and crust-derived magma combined with other features. The formation of Dongning and Fudong plutons are related to the subduction of Paleo-Pacific plate beneath the margin of eastern Asia in Jurassic, which represent the crustal remelting and accretion. Compared with the giant porphyry deposits in Central Asian Orogenic Belt, rocks in Yanbian generally possess low zircon Ce4+/Ce3 ratios, which indicate that low oxygen fugacity may don’t favor the large-scale mineralization in this area.