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In-Depth Information
The
starting
point
in
Berdichevsky-Dmitriev
test
is
the
inhomogeneity
parameter
N
mt
.
Here
we
outline
the
horizontally
homogeneous
(quasi-one-
dimensional)
areas
with
|
N
mt
| ≤
and
recognize
the
two-dimensional
and
three-dimensional
, which are the subject for fur-
ther study. Testing
skew
and Im
N
mt
, we divide these areas into zones of
four types: (1) zones with two-dimensional (elongated) or axisymmetric (iso-
metric)
areas
with
|
N
mt
|
>>
), (2)
zones with local two-dimensional (elongated) or three-dimensional structures
and regional one-dimensional (quasi-one-dimesional) structures as well as two-
dimensional
three-dimensional
structures
(
ske
w
S
≤
,
ske
w
B
≤
,
ske
w
CBB
≤
or
axisymmetric
structures
with
in-phase
principal
impedances
(Im
N
mt
≤
), (3) zones with local two-dimensional or three-dimensional struc-
tures and regional two-dimensional (elongated) or axisymmetric (isometric) three-
dimensional structures (Im
N
mt
>>
,
ske
w
>>
,
ske
w
≤
,
ske
w
≤
), (4)
S
B
CBB
zones with asymmetric three-dimensional structures (Im
N
mt
>>
,
ske
w
>>
,
S
ske
).
Summing up the magnetovariational and magnetotelluric tests, we classify
the target structures and apply the Zhang-Roberts-Pedersen, Bahr, Groom-Bailey,
Chave-Smith, Ritter-Banks techniques to determine the strike of the regional two-
dimensional background.
w
>>
,
ske
w
>>
B
CBB
Fig. 11.35
Magnetotelluric
parameters
|
N
mt
|
,
sqe
w
ang
,
ske
w
B
,
ske
w
S
along a profile crossing the
Kirghiz Tien Shan
