浅析双频激电野外测量出现负值的原因

Research on Negatives in Measuring Double Frequency Induced Polarization

引起双频激电仪野外测量出现负值的原因主要有两类:一类是由于电磁耦合效应;另一类是由于地下地质体的影响。对于电磁耦合效应,应尽量保持导线干燥、减小接地电阻及采用偶极装置等措施,来削减(或避免)电磁干扰,提高数据质量。对于地下地质体的影响,应仔细分析,提取其中隐含的有用信息。

There are two reasons for negatives in measuring double-frequency induced polarization, one is electromagnetic coupling effect, the other is geo-boby existing in an impersonal way. As for electromagnetic coupling effects, we should keep lead dryness, reduce the ground grid, adopt dipole configuration and use other ways to reduce（or avoid） disturb of electromagnetic and improve the quality of readings in field survey. As for geo-boby existing in an impersonal way, we should do our research earnestly and find out valuable information.