Frequency domain IPmeasurements were carried out during 1979-1982 over the Xidelake hematite deposit to test the effectiveness of the method, and encouraging results were achieved, Later, it was applied with success in Aqi of Xichang in search for chromites and V-Ti magnetites in basic-ultrabasic rocks in Daxiang-ping, Dechang for copper and magnetite ores in alkaline -ultrabasic rocks and in Huoyaopo of Dechang for, copper and tin ores respectively. As shown from both the test and actual prospecting results that the frequency and timedomain IPmethods are the same in essence by methodology and in result of prospecting. The former, however, can be applied to greater advantage in reconnaissance prospecting over the latter. These merits are particularly valuable and of practical significance in conducting electrical surveys in the mountainous south-west areas of our country.It is therefore a prospecting method with great potential application to intergrated geophysical and geochemical programs in mountainous areas at the present time.This paper presents a summary of the tests carried out in the recent years.