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the asthenospheric conductor, we get models which expose considerable difference
between isotropy and anisotropy at the distances of about 1000
1500 km stretching
over the whole tectonic province. But in active regions (especially with deep con-
ductive faults) the lithosphere resistance drops to 10
8
÷
m
2
and the
screening effect is not so dramatic (especially if sedimentary conductance is small).
Here, in all likelihood, we can differentiate between the anisotropic and isotropic
asthenospheric conductors even at distances of order of 300
10
8
÷
5
·
Ohm
·
÷
500 km and obtain
unique information on the state of the Earth's interior.
Summing up, we can say that studying the crustal and mantle conductive zones
we run the risk of wrong interpretation. But note that for the final conclusions, it
would be necessary to consider a set of models, in which the anisotropy strike does
not coincide with the strike of deep conductors.
