Abstract: Baiyinnuoer zinc-lead deposit in Chifeng, Inner Mongolia, is located at the middle segment of the Da Hinggan Mountains, in the Permian Huanggangliang Group. The distribution of the ore bodies are controlled by fold structures. The ore bodies are mainly composed of layered, disseminated and massive ores. The mineralization can be divided into two periods: the early mineralization including layered, layer parallel veined and brecciated ores, and the late mineralization including veinlets and veined ores. The sulfur isotopic compositions of the sulfides from ores show that the values (average -4.31‰) of the δ³⁴Ｓ of the early mineraliztion ores are clearly lower than that (average -1.83‰) of the late mineralization ores. Comprehensive studies indicate that the Baiyinnuoer zinc-lead deposit is a type of sedimentary exhalative Zn-Pb-Ag deposit and superimposed by Yanshanian magma hydrothermal activity. The main metallogenic period is the Permian.

Key words: sedimentary exhalative, sulfur isotope, Baiyinnuoer zinc-lead deposit