Abstract:

Duolun Yishengdian uranium-silver polymetallic deposit is located at the north of Guyuan-Duolun polymetallic metallogenic belt，which is a low sulfide，epithermal deposit，orebodies of this deposit are hosted in alteration potash-liparite of the third stage of Maotouebo in Jurassic and liparite of Mantouebo period，silver orebodies are veined，uranium orebodies are platelike，both are controlled by breccia zone.Combined to the study about geological character，orebodies，positon and distribution law of uranium-silver deposit，we state that alterations are closely related to silicification，fluorite，rhodochrosite，hydromica，carbonatation，which are controlled by volcanic，secondary volcanic and NW-NWW fault belt.NW-NWW pressure breccia belt is the profitable position of silver polymetallic deposit，the overlapped part of NW-NWW pressure breccia belt，secondary volcanic contact zone and hydrothermal breccia is the perfect zone for uranium-silver polymetallic deposit.Therefore，pressure breccia belt，secondary volcanic contact zone and hydrothermal breccia can be the geological symbol and help prospecting in the exploration area combined with geochemical anomaly and geophysical anomaly.

Key words: uranium-silver polymetallic deposit, geological characteristics, ore-controlling factors, Yishengdian, Inner Mongolia