Abstract:

The grassland overburden area of Inner Mongolia is an important area for forecasting concealed orebody recently.In order to seek a sort of fast and effective prospecting method in these areas,we use the high-power IP method and EH4 conductivity image system to test and explorate the mineral of multi -metal iron deposit, Alukeerqin,Inner Mongolia.The survey results of high-power IP method show that three high resistivity zone and one low-resistively abnormal belt can be recognized in the apparent resistively map.The high-resistively abnormal of high -polarizability are probably caused by altered and mineralization belt.The results of EH4 system measurement illustrate a clear geophysical abnormity in depth of the deposit.The obvious and visible abnormity, which correspond well to the known altered and mineralization belt and the results of IP survey,indicate that the deposit has a good metallogenic prospects.Practice shows that the integrated methods are very effective in prospecting the concealed deposit in the grassland overburden area．

Key words: Concealed deposit, Grassland overburden area, Time domain induced polarization method, EH4 conductivity image system, Integrated geophysical method, Inner Mongolia