Research output: Contribution to journal › Article › peer-review
Theoretical and methodological substantiation of transient electromagnetic sounding from the Arctic drift ice. / Mogilatov, V. S.; Osipova, P. S.; Zlobinsky, A. V.
In: Russian Geology and Geophysics, Vol. 61, No. 10, 10.2020, p. 1187-1195.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Theoretical and methodological substantiation of transient electromagnetic sounding from the Arctic drift ice
AU - Mogilatov, V. S.
AU - Osipova, P. S.
AU - Zlobinsky, A. V.
N1 - Funding Information: This work was financially supported by the Russian Science Foundation, grant No. 18-17-00095. Publisher Copyright: © 2020, V.S. Sobolev IGM, Siberian Branch of the RAS. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10
Y1 - 2020/10
N2 - Marine geoelectromagnetic sounding with artificial sources is strongly hindered by the influence of a conductive seawater layer. There is only one known wide successful application of electrical prospecting in this field - Controlled Source Electromagnetic Method (CSEM). However, this method has unfortunate limitations: the need to submerge an electromagnetic probe to the bottom of a deep (more than 1000 m) sea and the great rafting (~15 km). The method is not applicable in an ice-covered sea. Deep sounding from the sea surface and, hence, from the ice surface is possible if the TM polarization field is used. This field is generated by a vertical electric line (VEL) or a circular electric dipole (CED). The former has drawbacks even when it is used at sea. At the same time, a CED is efficient in one-dimensional and three-dimensional media in frequency and time modes. We have developed a three-dimensional mathematical tool for the CED field in the Born approximation, which is quite adequate in a conductive section with deep local inhomogeneities. The research is carried out within the framework of a geophysical project using the Arctic driftices.
AB - Marine geoelectromagnetic sounding with artificial sources is strongly hindered by the influence of a conductive seawater layer. There is only one known wide successful application of electrical prospecting in this field - Controlled Source Electromagnetic Method (CSEM). However, this method has unfortunate limitations: the need to submerge an electromagnetic probe to the bottom of a deep (more than 1000 m) sea and the great rafting (~15 km). The method is not applicable in an ice-covered sea. Deep sounding from the sea surface and, hence, from the ice surface is possible if the TM polarization field is used. This field is generated by a vertical electric line (VEL) or a circular electric dipole (CED). The former has drawbacks even when it is used at sea. At the same time, a CED is efficient in one-dimensional and three-dimensional media in frequency and time modes. We have developed a three-dimensional mathematical tool for the CED field in the Born approximation, which is quite adequate in a conductive section with deep local inhomogeneities. The research is carried out within the framework of a geophysical project using the Arctic driftices.
KW - Arctic
KW - Born approximation
KW - Circular electric dipole
KW - Drift ice
KW - Marine geoelectromagnetic sounding
KW - Vertical electric line
KW - circular electric dipole
KW - marine geoelectromagnetic sounding
KW - drift ice
KW - vertical electric line
UR - http://www.scopus.com/inward/record.url?scp=85095784800&partnerID=8YFLogxK
U2 - 10.15372/RGG2019130
DO - 10.15372/RGG2019130
M3 - Article
AN - SCOPUS:85095784800
VL - 61
SP - 1187
EP - 1195
JO - Russian Geology and Geophysics
JF - Russian Geology and Geophysics
SN - 1068-7971
IS - 10
ER -
ID: 26006317