Geological Features and Ore Prediction of Dixu Gold Deposit in Southeast Yunnan Province,China

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.