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w
B
and between 2
o
and 5
o
between 0.05 and 0.15 for
|
N
mt
|
,
Im
N
mt
,
ske
w
S
,
ske
for
ske
w
CBB
.
The flow chart for the magnetotelluric test is shown in Fig. 11.34. With the help
of this test we can outline horizontally homogeneous (quasi-one-dimensional) areas
and horizontally inhomogeneous areas with two-dimensional (elongated) or axisym-
metric (isometric) structures and asymmetric three-dimensional structures. What's
more, it is possible to single out the two-dimensional and axisymmetric structures
with in-phase principal impedances (arg
w
ang
,
ske
ζ
1
=
arg
ζ
2
), which are unfavorable for the
Bahr and Groom-Bailey decompositions.
Applying the magnetotelluric test, we use the profiles, maps, pseudo-sections
as well as pseudo-topographies of
|
N
mt
|
,
Im
N
mt
and
ske
w
S
,
ske
w
B
,
ske
w
CBB
and
discern the local (near-surface) and regional (deep) structures.
Fig. 11.34
Flow chart for the magnetotelluric dimensionality test
