Geology Reference
In-Depth Information
x
nx
x
(d) The area is covered by highly-conductive
glacial deposits 30-60 m thick. It is possible
that massive sulphide mineralization is present
within the bedrock. Bearing this information in
mind, comment upon and interpret the profiles
and pseudosections produced from (b) and (c).
6.
Why are the electrical methods of exploration
particularly suited to hydrogeological investiga-
tions? Describe other geophysical methods
which could be used in this context, stating the
reasons why they are applicable.
I
Δ
V
c
Fig. 8.41
The double-dipole electrode configuration. See
Question 5.
(c) Construct and contour pseudosections of the
DC apparent resistivity, PFE and MF.
n
=
1
n
=
2
n
=
3
n
=
4
r
dc
r
ac
r
dc
r
ac
r
dc
r
ac
r
dc
r
ac
c
(m)
(
W
m)
(
W
m)
(
W
m)
(
W
m)
(
W
m)
(
W
m)
(
W
m)
(
W
m)
0
49.8
49.6
101.5
100.9
30
72.8
72.4
99.6
98.5
60
46.0
45.8
86.2
85.2
90
61.3
60.6
90.0
86.1
120
42.1
41.7
72.8
70.1
150
55.5
54.4
57.5
53.5
180
44.0
43.5
49.8
46.6
210
53.6
51.1
47.9
44.0
240
42.1
41.8
44.0
41.4
270
65.1
64.1
47.9
44.9
300
49.8
49.6
95.8
91.7
330
82.3
81.3
132.1
129.4
360
51.7
51.3
114.9
114.1
390
86.2
85.9
164.7
164.0
420
49.8
49.6
120.7
120.1
450
78.5
78.0
170.4
169.7
Marshall, D.J. & Madden,T.R. (1959) Induced polarisation: a study
of its causes.
Geophysics
,
24
, 790-816.
Milsom, J. (1989)
Field Geophysics.
Open University Press, Milton
Keynes.
Parasnis, D.S. (1973)
Mining Geophysics.
Elsevier, Amsterdam.
Parasnis, D.S. (1996)
Principles of Applied Geophysics
, 5th edn.
Chapman & Hall, London.
Parkhomenko, E.I. (1967)
Electrical Properties of Rocks.
Plenum,
NewYork.
Sato, M. & Mooney, H.M. (1960) The electrochemical mechanism
of sulphide self potentials.
Geophysics
,
25
, 226-49.
Sumner, J.S. (1976)
Principles of Induced Polarisation for Geophysical
Exploration.
Elsevier, Amsterdam.
Telford, W.M., Geldart, L.P. & Sheriff, R.E. (1990)
Applied Geo-
physics
, 2nd edn. Cambridge University Press, Cambridge.
Ward, S.H. (1987) Electrical methods in geophysical prospecting.
In
: Samis, C.G. & Henyey, T.L. (eds),
Methods of Experimental
Physics,Vol. 24, Part B - Field Measurements
, 265-375. Academic
Press, Orlando.
Further reading
Bertin, J. (1976)
Experimental andTheoretical Aspects of Induced Polar-
isation,Vols 1 and 2.
Gebrüder Borntraeger, Berlin.
Fink, J.B., McAlister, E.O. & Wieduwilt,W.G. (eds) (1990)
Induced
Polarization. Applications and Case Histories.
Society of Explo-
ration Geophysicists,Tulsa.
Griffiths, D.H. & King, R.F. (1981)
Applied Geophysics for Geologists
and Engineers.
Pergamon, Oxford.
Habberjam, G.M. (1979)
Apparent Resistivity and the Use of Square
Array Techniques.
Gebrüder Borntraeger, Berlin.
Keller, G.V. & Frischnecht, F.C. (1966)
Electrical Methods in
Geophysical Prospecting
. Pergamon, Oxford.
Koefoed, O. (1968)
The Application of the Kernel Function in Interpret-
ing Resistivity Measurements.
Gebrüder Borntraeger, Berlin.
Koefoed, O. (1979)
Geosounding Principles. I - Resistivity Sounding
Measurements.
Elsevier, Amsterdam.
Kunetz, G. (1966)
Principles of Direct Current Resistivity Prospecting.
Gebrüder Borntraeger, Berlin.
