Abstract: The Luzong basin is one of the most important Fe-Cu ore concentration regions in the metallogenic belts along the middle and lower reaches of the Yangtze River. The early Cretaceous diorite-porphyrites are closely associated with metallization in the Luzong basin, but its diagenetic age is still controversial. The zircon LA-ICP-MS U-Pb dating for two diorite-porphyrite samples from deep holes in the Huangyinchong Zn-Pb deposit yielded the weighted mean 206Pb /238U ages of 135±1 Ma and 134.9±0.5 Ma, respectively, suggesting the diagenetic age of the diorite-porphyrites in the Huangyinchong Zn-Pb deposit is about 135Ma. It further confirms existence of an earlier magmatic activity in the Luzong basin, which might result from the tectonic setting from extrusion to tension during the period of 138～132Ma, with the most active period at ca. 135Ma. At the same time, a series of the Fe-Au-Zn-Pb deposits related to　diorite-porphyrite were formed at different positions of the Luzong basin.