The East Kunlun Orogenic Belt (EKOB) in northeast margin of the Qinghai-Tibetan Plateau is an important part of the Central Orogenic System (COS). During the long-time geological evolution, complicated tectono -magma events occurred in the EKOB and produced large-scale granitic intrusions with different ages and origins, in which the plutons crystallized in the period from late Late Paleozoic to early Mesozoic developed predominantly in the area. Xiangjiananshan granitic batholith is the main constituent part of the EKOB and contains numerous mafic microgranular enclaves (MMEs), on which studies the issues of Triassic crust-mantle magma mixing and mingling and its geodynamics background in the EKOB would be