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Fig. 7.36
Apparent-resistivity curves
xy
and
yx
distorted by the flow-around and current-
gathering effects over a resistive (
S
1
/
S
1
16) or conductive (
S
1
/
S
1
=
1
/
=
16) inclusion,
xy
(
S
1
/
S
1
)
=
yx
(
S
1
/
S
1
). The observation is carried out at the site
x
<
b
. Model param-
=
0
,
|
y
|
eters:
2
/
1
=∞
,
3
/
1
=
0
,
h
2
/
h
1
=
20
.
Curve parameter:
a
/
b
,
xy
(
a
/
b
)
=
yx
(
b
/
a
)
effects appear. They manifest themselves clearly in the fact that the ascending
branches of the trasverse
yx
-curves recede from the
S
1
-line, while their descending
branches approach the
h
-line. We see that the flow-around and current-gathering
effects distort the ascending branches of the transverse apparent-resistivity curves,
but reduce the
S
effect distorting their descending branches. At the same time the
ascending branches of the longitudinal
−
xy
-curves approach the
S
1
-line, while their
descending branches recede from the
h
-line. The flow-around and current-gathering
