关键词: 银铅锌多金属矿, 中低温热液型, 地质特征, 找矿潜力

Abstract: Baoshantao Ag-Pb-Zn Deposit in Tongling is located in the southeastern wing of Shujiadian anticline in Guichi-Fanchang fault fold bundle and the northeast side of Xinwuli rock mass.It is a medium-sized Ag-Pb-Zn polymetallic deposit newly discovered in recent years.Based on the regional and mining exploration results，the metallogenic geological background and geological characteristics of the deposit，ore body characteristics and ore characteristics are summarized，and the ore-controlling factors and genesis of the deposit are analyzed.The results show that: ① orebodies mainly occur in Qixia Formation （P1q），Gufeng Formation （P1g），Longtan Formation （P2l） and Dalong Formation （P2d），mainly controlled by interlayer sliding structures，and ore bodies are mostly layered and lenticular in shape.The controlled length of ore body along strike reaches 2 200 m，ore body strike is 50°~60°，dip direction is southeast with 60°~85° dip angle，and the maximum depth along the dip is 591 m.The orebody is characterized by expansion，shrinkage and pinch-out reappearance. ② Metal minerals in ores are mainly composed of pyrite，galena，sphalerite and a small amount of chalcopyrite， tetrahedrite， arsenopyrite and trace silver-gold ore，natural silver，white iron ore and hessite.Gangue minerals are mainly composed of a small amount of quartz and calcite.The ore structure is mainly veinlet structure and disseminated structure. ③ The genesis of the deposit belongs to a medium-low temperature hydrothermal filling type Ag-Pb-Zn deposit.On the basis of the above analysis，the regional prospecting potential is discussed，and it is concluded that there is a good potential of Pb-Zn mineralization in Tongling area.

Key words: Ag-Pb-Zn polymetallic ore, medium-low temperature hydrothermal, geological characteristics, mining potential