Electromagnetic Responses from Seismically Excited Targets B: Non-Piezoelectric Phenomena

M. Maxwell; R. D. Russell; A. W. Kepic; K. E. Butler

doi:10.1071/EG992201

ISSN: 0812-3985
E-ISSN: 1834-7533

Electromagnetic Responses from Seismically Excited Targets B: Non-Piezoelectric Phenomena
Authors M. Maxwell^a, R. D. Russell^a, A. W. Kepic^a and K. E. Butler^a
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^a Department of Geophysics and AstronomyThe University of British, Columbia, Vancouver, BC, Canada, V6T 1Z4
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 23, Issue 1-2, Mar 1992, p. 201 - 208
DOI: https://doi.org/10.1071/EG992201
- Published online: 01 Mar 1992

Abstract

Seismoelectric exploration records the electrical (or magnetic) response from a seismic input in order to resolve targets that may not be amenable to other geophysical methods. The latter targets include quartz veins, relatively pure sphalerite and kimberlite.

Various mechanisms have been proposed to explain the conversion of seismic to electromagnetic energy. Of these, piezoelectricity is the most familiar. This paper concentrates on other, less familiar, phenomena. We examine these in the context of four field experiments carried out in various geological settings. These settings are the quartz-ankerite Paymaster vein, near Timmins, Ontario; a road fill at Haney, British Columbia; and at the Mobrun, Quebec, and Sullivan, British Columbia, sulphide mines. The first two illustrate essentially linear conversion processes in which the measured electric field contains frequencies comparable with those in the seismic input. The third and fourth illustrate highly nonlinear processes with high-frequency impulsive responses.

Brief descriptions are given of the experimental techniques that were used, and representative results are presented. In all cases, the measurements give information about targets of interest, and therefore suggest that seismoelectric techniques deserve more attention than has been afforded them in the past.

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References

Blau, L. W., and Statham, L. (1936). ‘Method and apparatus for seismic-electric prospecting’, U.S. Patent No. 2 054 067
Cress, G. O., Brady, B. T., and Rowell, G. A. (1987). ‘Sources of electromagnetic radiation from fracture of rock samples in the laboratory’. Geophys. Res. Lett. 14, 331-334.
Ivanov, A. G. (1940). ‘The seismoelectric effect of the second kind’. Izv. Akad. Nauk SSSR, Ser. Geograf. i Geofiz. 4, 699-727. (In Russian. English translation is available from the US Library of Congress.)
Martner, S. T., and Sparks, N. R. (1959). ‘The electroseismic effect’. Geophysics24, 297-308.
O’Keefe, S. G., and Thiel, D. V. (1991). ‘Electromagnetic emissions during rock blasting’. Geophys. Res. Lett. 18, 889-892.
Russell, R. D., Maxwell, M., Butler, K. E., and Kepic, A. W. (in press). ‘Electromagnetic responses from seismically excited targets A: piezoelectric phenomena at Humboldt, Australia’. Explor. Geophys. 23 (this volume).
Sobolev, G. A., Demin, V. M., Los, V. F., and Maybuk, Yu. Ya. (1982). ‘Study of the electromagnetic radiation of rocks containing semiconductor and piezoelectric minerals’. Izv. Akad. Nauk SSSR, Ser. Geofiz. 11, 72-86. (In Russian. English translation in Izvestiya, Earth Physics, American Geophysical Union, 18, 888-897, 1982.)
Sobolev, G. A., Demin, V. M., Narod, B. B., and Whaite, P. (1984). ‘Tests of piezoelectric and pulsed-radio methods for quartz vein and base-metal sulfides prospecting at Giant Yellowknife Mine, N.W.T., and Sullivan Mine, Kimberley, Canada’. Geophysics49 2178-2185.
Thompson, A. H., and Gist, G. A. (1991). ‘Electroseismic prospecting’. 61st Ann. Internat. Mtg., Soc. Expl. Geophys., Expanded Abstracts, 425-427. (??)
Thompson, R. R. (1936).‘ The seismic-electric effect’. Geophysics1, 327-335.
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Article Type: Research Article

Keyword(s): electromagnetics; exploration; piezoelectric; seismoelectric

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Electromagnetic Responses from Seismically Excited Targets B: Non-Piezoelectric Phenomena

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