Studying Frozen Cross-Sections in Yakutia Using Near-Field Transient Electromagnetic Sounding and Induced Polarization Vertical Electrical Sounding

Ageev, V. V.; Ageev, D. V.

doi:10.25296/1993-5056-2017-2-64-69

Cited by 4 publications

(1 citation statement)

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“…In Yakutia, induction transients showing the fast induced polarization effect are observed everywhere and not only where frozen rocks with a vertically layered structure are common (Ageev & Ageev, 2017; Kozhevnikov & Antonov, 2006; Stogny, 2008). Besides, the resistivity of frozen rocks with a layered structure is in the range from 3 × 10 3 to 10 5 Ωm (Frolov, 1998), while the fast induced polarization effect in the TEM data is often observed in areas with the near‐surface resistivity of a few hundred Ωm and less (Kozhevnikov & Antonov, 2006; Stogny, 2008).…”

Section: An Overview Of Previous Modelsmentioning

confidence: 99%

On the association between fast induced polarization in frozen rocks and dielectric polarization of ice

Kozhevnikov

2022

Geophysical Prospecting

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Most often, fast induced polarization in frozen rocks appears in the transient electromagnetic data at early (less than a few hundreds of microseconds) times as a nonmonotone voltage response. Usually, such transients are interpreted in terms of Pelton's resistivity/conductivity model. The relaxation time τIS found in this way determines the decay rate of transient voltage response to a current step. Conversion of τIS into the relaxation time τVS, determining the decay rate of the current response to a voltage step, gives τVS values typical for dielectric relaxation of ice at temperatures of about several degrees below zero. This result, along with the fact that both fast induced polarization and dielectric polarization of ice are described by the Debye relaxation model, suggests that fast induced polarization in frozen rocks is controlled by the dielectric polarization of ice. As a possible mechanism for such a control, the effect of ice polarization on the surface conductivity of frozen rocks is considered.

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Section: An Overview Of Previous Modelsmentioning

confidence: 99%