Abstract:
In studies of highly resistive subsoils, geoelectric method with galvanic contact is not effective due to the difficulty to obtain a good contact and therefore a good current flow. The potential differences generated are very small, of similar magnitude to the noise level. The aim of this work is to develop a technique in order to facilitate the electric contact in such cases. In order to do more efficient the electrical contact, we designed and developed a low power geoelectric equipment using alternating injection current and capacitive coupling which can be used in highly resistive mediums and also on hard surfaces like asphalt or concrete. We have studied the processing and interpretation of data obtained with this equipment. It was studied the conditions under which the equipment can operate similarly to geoelectric galvanic contact so that data can be interpreted under the same patterns of interpretation. The studies made on scale models with the capacitive equipment on simulated soils with very high resistivity media, agree with the results obtained with the usual galvanic contact.
Registro:
| Documento: |
Conferencia
|
| Título: | Development of a geoelectric device of capacitive contact for studying archaeological targets in very resistive zones |
| Autor: | Osella, A.; Bongiovanni, M.V.; De La Vega, M. |
| Ciudad: | Paris |
| Filiación: | IFIBA, CONICET, University of Buenos Aires, Argentina
CONICET, Universidad Austral, Argentina
IFIBA, CONICET, Argentina
|
| Palabras clave: | Computer simulation; Electric contacts; Geology; Geophysics; Soils; Alternating injection; Capacitive couplings; Capacitive equipment; Electrical contacts; Geoelectric methods; High resistivity; Interpretation of data; Potential difference; Equipment |
| Año: | 2012
|
| Título revista: | 18th European Meeting of Environmental and Engineering Geophysics of the Near Surface Geoscience Division of EAGE, Near Surface Geoscience 2012
|
| Título revista abreviado: | Near Surf. Geosci.
|
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS23511_v_n_p_Osella |
Referencias:
- Benderitter, Y., Jolivet, A., Mounir, A., Tabbagh, A., Application of the electrostatic quadripole to sounding in the hectometric depth range (1994) J. Appl. Geophys., 31, pp. 1-6
- Bongiovanni, M.V., (2010) Desarrollo de Un Equipo Para La Detección Rápida de Anomalías Eléctricas Superficiales En Regiones Extensas y Su Aplicación Para La Caracterización de Sitios, , Doctoral Thesis, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires
- Kuras, O., Beamish, D., Meldrum, P.I., Ogilvy, R.D., Fundamentals of the capacitive resistivity technique (2006) Geophysics, 71 (3), pp. G135-G152
- Martino, L., Bonomo, N., Lascano, E., Osella, A., Ratto, N., Electrical and gpr prospecting at palo blanco archaeological site, northwestern Argentina (2006) Geophysics, 71 (6), pp. B193-B199
- Loke, M.H., Barker, R.D., RES2DINV, program distributed by geotomo, based on rapid least-squares inversion of apparent resistivity pseudosections by a quasi-newton method (1996) Geophys. Prosp., 44, pp. 499-523A4 - BRGM; et al.; INRA; IPGP; IRIS Instruments; Veolia Environment
Citas:
---------- APA ----------
Osella, A., Bongiovanni, M.V. & De La Vega, M.
(2012)
. Development of a geoelectric device of capacitive contact for studying archaeological targets in very resistive zones. 18th European Meeting of Environmental and Engineering Geophysics of the Near Surface Geoscience Division of EAGE, Near Surface Geoscience 2012.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS23511_v_n_p_Osella [ ]
---------- CHICAGO ----------
Osella, A., Bongiovanni, M.V., De La Vega, M.
"Development of a geoelectric device of capacitive contact for studying archaeological targets in very resistive zones"
. 18th European Meeting of Environmental and Engineering Geophysics of the Near Surface Geoscience Division of EAGE, Near Surface Geoscience 2012
(2012).
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS23511_v_n_p_Osella [ ]
---------- MLA ----------
Osella, A., Bongiovanni, M.V., De La Vega, M.
"Development of a geoelectric device of capacitive contact for studying archaeological targets in very resistive zones"
. 18th European Meeting of Environmental and Engineering Geophysics of the Near Surface Geoscience Division of EAGE, Near Surface Geoscience 2012, 2012.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS23511_v_n_p_Osella [ ]
---------- VANCOUVER ----------
Osella, A., Bongiovanni, M.V., De La Vega, M. Development of a geoelectric device of capacitive contact for studying archaeological targets in very resistive zones. Near Surf. Geosci. 2012.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_NIS23511_v_n_p_Osella [ ]
