Abstract: Yanzigou gold deposit is located in Yongxi dome core of Ganzi Danba county in Sichuan province.Ore bodies like Lens and atoid ores occur in the devonian epimetamorphic black shale series.The formation of ore bodies has a close relationship with coarse gold-bearing quartz veins and fine quartz net ores and is obviously affected by the fault.NNW of Maoniuhe river fracture and EW of Mozigou fracture,as well as some related small fracture consist of a Mi-zi type structure which provides a good migration and storage space for ore-forming fluids.In addition,the magma and metamorphism also play an important role in mineralization.In accordance with the known ore bodies,the external exploration is controlled by the ore-body structure and the ore-occurred rocks.Based on these characteristics,it can play a guiding role in external exploration and provide a great significance to explore large atoid gold ores from the fourth formation carbonaceous phyllite in devonian of western Sichuan area. 

Key words: Yanzigou gold mine, Mulongtao gold mine, Mi zi type structure, Ore prospecting significance, Danba, West Sichuan area