大功率激电法和瞬变电磁法相结合的应用探讨

The Application of Combining High Power IP Method and Transient Electromagnetic Method

青海锡铁山铅锌矿区位于柴达木盆地北缘,矿床为一套绿片岩相为主的浅变质岩系。为获得锡铁山铅锌矿的外围深部地球物理信息,首次将大功率激电和大功率瞬变电磁法应用于接地条件恶劣、地形复杂的锡铁山地区。并在某一勘探线向南延伸部位发现一低阻高极化激电异常和瞬变电磁异常,由于这两种方法的异常可相互验证,再结合矿山早期和外围地质研究工作,推断该异常为深部铅锌矿体所引起。为矿山外围找矿提供了深部地球物理依据。

The Qinghai xitiesan lead-zinc district is located in the northern Qaidam Basin. The deposit is a set of greenschist grade metamorphic series based. For getting the peripheral deep geophysical information of xitiesan lead-zinc mine, we will for the first time to use high-power IP and high-power transient electromagnetic method in ground conditions, topography and complex xitiesan region. We found a low resistance high chargeability IP anomaly and transient electromagnetic anomalies in the parts of a prospecting line extending southward. Because of the exception of these two methods can be mutual authentication, and combining with the work of the mine early and peripheral geological research, we infer that the exception is caused by lead-zinc body for deep. This new discovery provides mines peripheral prospecting deep geophysical basis.