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THE INDUCTIVE RESPONSE OF A HORIZONTAL CONDUCTING CYLINDER BURIED IN A UNIFORM EARTH FOR A UNIFORM INDUCING FIELD *
Author(s) -
OGUNADE S.O.,
DOSSO H.W.
Publication year - 1980
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1980.tb01245.x
Subject(s) - cylinder , conductivity , magnetotellurics , geology , field (mathematics) , amplitude , earth (classical element) , electrical conductor , electrical resistivity and conductivity , geometry , mineralogy , materials science , physics , optics , composite material , mathematics , quantum mechanics , pure mathematics , mathematical physics
A bstract The inductive response of a conducting horizontal cylinder embedded in a uniform earth is studied using numerical results obtained for an analytical solution for the problem of a conducting cylinder buried in a homogeneous earth for the case of a uniform inducing field. A check of the validity of the numerical results is made by a comparison with analogue model measurements for a number of cases. Numerical results for a range of cylinder radii (a = 1–10 km), depths of burial ( d = 0–4 km), conductivity contrasts (σ 2 = 10 −2 ‐10 Sm −1 ), and source frequencies ( f = 10 −1 ‐10 −4 Hz) of interest in the interpretation of magnetotelluric field measurements are presented. The results indicate that for a uniform inducing field the conductivity and depth of burial of a horizontal cylindrical inhomogeneity are best determined through a measurement of the amplitudes H y , H z and E x and the phases φ y and Ψ x .