Fig. 15

The surface plots of the apparent resistivities \({\rho }_{xy}^{\mathrm{app}}\), \({\rho }_{yx}^{\mathrm{app}}\), \({\rho }_{xx}^{\mathrm{app}}\), and \({\rho }_{yy}^{\mathrm{app}}\) and the magnitude of the tipper \(\left|{T}_{x}\right|\) and \(\left|{T}_{y}\right|\), respectively, from top to bottom rows, at a period of 10 s from a the isotropic case of ρ = 50 Ω-m as reference, and axial anisotropic cases when b \({\rho }_{x}\) = 5 Ω-m, c \({\rho }_{x}\) = 500 Ω-m, d \({\rho }_{y}\) = 5 Ω-m, e \({\rho }_{y}\) = 500 Ω-m, f \({\rho }_{z}\) = 5 Ω-m, and g \({\rho }_{z}\) = 500 Ω-m in the axial anisotropy experiment in section "The axial anisotropy". The dash line marks the boundary of the 3-D body in Fig. 1 where it is buried at 5 km depth