Objectives: The Dibao Cu(Au) deposit, located in the southern Qiangtang Terrane, northern Bangong Co—Nujiang suture zone, is a newly discovered porphyry— epithermal Cu(Au) deposit, with a good exploring prospect in Duolong ore concentration area. Methods:This articale did the fist study to the ore bearing porphyry via LAICPMS zircon UPb dating, Hf isotope and trace element composition analysis. Results:According to the 23 points zircon dating data, it obtained zircon 206Pb / 238U weighted average age of 122.0 ± 2.5Ma (MSWD = 0.34), consistented with the mineralization magmatism time limit in Duolong ore concentration area, is one of the most important part of Duolong ore concentration area. Trace element characteristics of zircons indicated that they are the same period of magmatic zircons. Their crystallization temperature is from 663℃ to 850 ℃, an average of 765 ℃,via Ti thermometer of zircon, which suggested that their magma source region maybe have experienced partial molten under a watersaturated condition. Conclusion: Hf isotope analysis data show that orebearing porphyry zircon Hf isotope 176Hf / 177Hf ratios are relatively high, 0.282726 ~ 0.283054, εHf (t) of 1.1 to 12.6, are positive, their material source have some mantle source composition, may be a newborn lower crust from crust—mantle mixed source.