Models of Deep Geoelectric Structures - Models and Methods of Magnetotellurics - page 297

Fig. 8.17 Two-dimensional models of the crustal conductive zones. The model ICC contains
an isotropic crustal conductor, the model ACC-I contains an anisotropic crustal conductor with
alternating vertical dykes

From Kirchhoff's laws, we have: xx ≈ 10 Ohm · m , yy ≈ 500 Ohm · m ,

and zz ≈ 10 Ohm · m. The apparent-resistivity and tipper curves have been

computed for different distances from the model centre ( y .

The calculations performed by the finite-element method (Wannamaker et al.,
1987) show that the apparent-resistivity and tipper curves generated in the models
ICC and ACC-I are so close to each other that it would be impossible to distinguish
between them.

= 0 , − 22 , − 80 km)