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

LIU Ji-shun1,ZHOU Yu-guo1,2,3,HAN Hai-tao1,GAO Qi-zhi2,LIN Jia-yong1,2,LIU De-li1,GUO Jun11.School of Postgraduate,Central South University,Changsha 410083,China2.Geophysical and Geochemical Exploration Team,Yunnan Geology and Mineral Resources Bureau,Kunming 652100,China3.Longxing Mining Industry Limited Company in Wenshan,Guangnan,Yunnan 663300,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.
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