Artículo
Abstract:
The Antinaco-Los Colorados valley is a wide N-S tectonic depression, located between the Sa. de Velazco and the Sa. de Famatina, both ranges belonging to the Sierras Pampeanas thick-skinned deformation province in Argentina. From previously reported magnetotelluric (MT) data, it is known that the thickness of the sedimentary sequences may reach up to 8 km in the central zone of this basin. In particular, the Quaternary-to-recent alluvial filling contains an aquifer complex of great importance for this semiarid zone providing water for irrigation and also for human consumption. To obtain information about the electrical structure of the alluvial cover, 17 vertical electric soundings were carried out along an E-W traverse profile extending from one side of the valley to the other. A geoelectrical model is proposed taking into account complementary hydrogeological and geophysical information. In this model, the various layers which could contain fresh water are identified and the level of the water table inferred from the model is almost coincident with that observed from existing wells in the surveyed zone. The Antinaco-Los Colorados valley is a wide N-S tectonic depression, located between the Sa. de Velazco and the Sa. de Famatina, both ranges belonging to the Sierras Pampeanas thick-skinned deformation province in Argentina. From previously reported magnetotelluric (MT) data, it is known that the thickness of the sedimentary sequences may reach up to 8 km in the central zone of this basin. In particular, the Quaternary-to-recent alluvial filling contains an aquifer complex of great importance for this semiarid zone providing water for irrigation and also for human consumption. To obtain information about the electrical structure of the alluvial cover, 17 vertical electric soundings were carried out along an E-W traverse profile extending from one side of the valley to the other. A geoelectrical model is proposed taking into account complementary hydrogeological and geophysical information. In this model, the various layers which could contain fresh water are identified and the level of the water table inferred from the model is almost coincident with that observed from existing wells in the surveyed zone.
Registro:
| Documento: | Artículo |
| Título: | Electrical imaging of an alluvial aquifer at the Antinaco-Los Colorados tectonic valley in the Sierras Pampeanas, Argentina |
| Autor: | Osella, A.; Favetto, A.; Martinelli, P.; Cernadas, D. |
| Ciudad: | Amsterdam, Netherlands |
| Filiación: | Dto. de Fis.-Gr. Geofis. Aplicada, Fac. de Ciencias Exactas y Naturales, Ciudad Universitaria, Pab. 1, 1428 Buenos Aires, Argentina |
| Palabras clave: | Alluvial aquifer; Antinaco-Los Colorados valley; Argentina; Sierras Pampeanas; Aquifers; Mathematical models; Tectonics; Alluvial aquifers; Electric sounding; Tectonic depression; Electric prospecting; alluvial deposit; aquifer; electrical method; imaging method; overburden; Argentina |
| Año: | 1999 |
| Volumen: | 41 |
| Número: | 4 |
| Página de inicio: | 359 |
| Página de fin: | 368 |
| DOI: | http://dx.doi.org/10.1016/S0926-9851(99)00003-8 |
| Título revista: | Journal of Applied Geophysics |
| Título revista abreviado: | J. Appl. Geophys. |
| ISSN: | 09269851 |
| CODEN: | JAGPE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09269851_v41_n4_p359_Osella |
Referencias:
- Aubry, L., Roperch, P., De Urreiztieta, M., Rosello, E., Chauvin, A., Paleomagnetic study along the southeastern edge of the Altiplano-Puna Plateau: Neogene tectonic rotations (1996) J. Geophys. Res., 101, pp. 17883-17899
- De Alba, E., Descripción geológica de Chilecito (1979) Serv. Geol. Nac., , 85 pp
- González Bonorino, F., Algunos problemas geológicos de las Sierras Pampeanas (1950) Assoc. Geol. Argent. Rev., 5, pp. 81-110
- Jordan, T., Allmendinger, R., Sierras Pampeanas of Argentina: A modern analogue of Rocky Mountain foreland deformation (1986) Am. J. Sci., 286, pp. 737-764
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- Osella, A., Martinelli, P., Cernadas, D., 2D Geoelectrical modeling using a Rayleigh-Fourier method (1998) IEEE Geoscience and Remote Sensing, , submitted
- Pomposiello, C., Osella, A., Favetto, A., Sainato, C., Martinelli, P., Current channelling and 3D effects detected from MT data at a sedimenatry basin in Sierras Pampeanas, Argentina (1998) Geophys. J. Inter., , in press
Citas:
---------- APA ----------
Osella, A., Favetto, A., Martinelli, P. & Cernadas, D. (1999) . Electrical imaging of an alluvial aquifer at the Antinaco-Los Colorados tectonic valley in the Sierras Pampeanas, Argentina. Journal of Applied Geophysics, 41(4), 359-368.http://dx.doi.org/10.1016/S0926-9851(99)00003-8
---------- CHICAGO ----------
Osella, A., Favetto, A., Martinelli, P., Cernadas, D. "Electrical imaging of an alluvial aquifer at the Antinaco-Los Colorados tectonic valley in the Sierras Pampeanas, Argentina" . Journal of Applied Geophysics 41, no. 4 (1999) : 359-368.http://dx.doi.org/10.1016/S0926-9851(99)00003-8
---------- MLA ----------
Osella, A., Favetto, A., Martinelli, P., Cernadas, D. "Electrical imaging of an alluvial aquifer at the Antinaco-Los Colorados tectonic valley in the Sierras Pampeanas, Argentina" . Journal of Applied Geophysics, vol. 41, no. 4, 1999, pp. 359-368.http://dx.doi.org/10.1016/S0926-9851(99)00003-8
---------- VANCOUVER ----------
Osella, A., Favetto, A., Martinelli, P., Cernadas, D. Electrical imaging of an alluvial aquifer at the Antinaco-Los Colorados tectonic valley in the Sierras Pampeanas, Argentina. J. Appl. Geophys. 1999;41(4):359-368.http://dx.doi.org/10.1016/S0926-9851(99)00003-8
