《Table 5 Single-grain zircon Hf isotopic data for the syenite and granite in the Tengchong block》

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《"Early-Cretaceous Syenites and Granites in the Northeastern Tengchong Block, SW China: Petrogenesis and Tectonic Implications"》

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The zircons from dated samples were also analyzed for Lu-Hf isotopes on the same domains，and the results are listed in Table 5.Initial 176Hf/177Hf ratios andεHf（t）values of the zircons were calculated according to their LA-ICP-MS zircon U-Pb dates for the syenite.We selected 12zircon grains from the syenite（DMJ13）for Lu-Hf isotopic analysis.All of these spots display concordant zircon U-Pb dating，which have various and relative enriched Hf isotopic compositions withεHf（t）values ranging from-9.11 to-0.27（but one is+5.30），with corresponding twostage Hf model ages of 1.18 to 1.75Ga（but one is 0.83Ga）.Above these various Hf compositions possibly indicate the more ancient continental crust（Yang et al.，2007；Zheng et al.，2007）.