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THE APPLICATION OF ELECTROMAGNETIC TECHNOLOGY TO PERMAFROST EXPLORATION |
WANG Tong, YU Qi-hao, YOU Yan-hui, WANG Wu, DU Er-ji |
State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou 730000, China |
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Abstract The exploration of permafrost thickness refers to determining the upper and the lower limits of frozen soil depth. According to the geophysical properties of permafrost, frozen and non-frozen soils show significant differences in the permittivity and resistivity . Using ground penetrating radar (GPR) and transient electromagnetic sounding method (TEM) respectively, the authors explored the upper and the lower limits of permafrost in hot spring areas of eastern Tibetan Plateau. The results show that GPR and TEM can effectively solve the above problems. It is concluded that applying GPR and TEM is a set of feasible methods for the exploration of permafrost thickness in the range of 0 ~ 100 m in depth.
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Received: 02 June 2010
Published: 15 October 2011
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