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Hengshan granulite facies terrane consists of tonalite-trondhjemite-granodiorite (TTG) gneisses and minor high-pressure mafic granulite blocks. LA-ICP-MS zircon dating for two TTG gneiss samples indicates metamorphic ages of 1916.7±9.9 Ma and 1850–1930 Ma, and magmatic protolith age of ca. 2.5 Ga, with similar HREE-rich patterns. Phase equilibria modelling in ZrO2-bearing system reveals that zircon...
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