交流激发极化法在四川山区的试验找矿效果

直流激电法于60年代初便在四川开始使用。因方法设备笨重,工作效率低,电源功率有限,使用受到很大的限制,工作多在点上进行。那么,在四川山区用什么电法配合普查金属矿呢？为此,我队于1979年至82年在四川西南山区的赤铁矿、含铬超基性岩、含多金属的碱性超基性岩和铜锡成矿带上开展了交流激电法的试验和找矿工作。

FREQUENCY DQMAIN INDUCED POLARIZATION SURVEYSIN MOUNTAINOUS AREAS OF SI SICHUAN

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.