Abstract: Dixu gold deposit is one of the unusual medium-large-scaled gold deposits discovered in Southeast Yunnan Province, in which As and Au are closely associated. Genetically, the deposit belongs to epithermal (mesothermal) super fine-grained contaminated gold deposit. Based on the geological features, the genesis and the controlling factors of the deposit are discussed: (1)Dixu gold deposit is one of the gold deposits occurring as belts along Wenshan-Funing thrust nappe structure, which is the key controlling factor for gold deposits while short-axial anticline is one of the best locations for gold mineralization and short-axial anticlines are the favorite location for ore bodies; (2)Ermeishan basalt with joints, cracks, and pores are the most important ore-hosting rocks; (3)Rather trapped environment with low temperature is the necessary physical environment for the formation of epithermal (mesothermal) fine-grained disseminated gold deposits. The direction of exploration has been discussed and forecast in outer and deeper areas of this deposit.

Key words: geological features, ore prediction, Southeast Yunnan Province, Dixu gold deposit