Test And analyses of TEM B-field parameter
In normal TEM sounding, the parameter of secondary induced voltage V signal is collected by using magnetic induced coil, however, the late signal is usually too weak to distinguish deep buried target.In this paper, direct measuring of B-field parameters is used to test its practical effect.Firstly, from the response of B-field and dB/dt and numerical calculation of different models, we can see that the B-field has superiority in late time detection.Then SM24 TEM system which is used to measure B-field and GDP-32 system which is used to measure induced voltage are compared.With the same observation parameters, B-field data is more superiority than induced voltage data.The characteristic frequency of fluxgate sensor is relatively low and it decays slow.in addition, the amplitude of B-field data is larger than dB/dt data.It is favorable to measure in late time because of its low effect with low resistivity covered layer.The results show that it is an important direction to solve fine TEM exploration by developing and using fluxgate sensor.
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Yugang Zhao Zhanguo Lu Guoqiang Xue Huasen Zhong
Beijing Orange lamp Geophysical Exploration Company Limited Beijing, China Key Laboratory of Mineral Resources Institute of Geology and Geophysics, Chinese Academy of Sciences
国际会议
北京
英文
184-186
2016-06-27（万方平台首次上网日期，不代表论文的发表时间）