Coast effect in magnetotelluric soundings over the Yucatán peninsula, Mexico
DOI:
https://doi.org/10.22201/igeof.00167169p.2001.40.1.418Palabras clave:
Sondeo magnetotelúrico, modelación 3-D, efecto de costa, cráter de Chicxulub, península de YucatánResumen
A partir de la modelación sintética de la península de Yucatán se pudo establecer que el efecto de costa sobre las mediciones magnetotelúricas realizadas en la región de impacto de Chicxulub es despreciable.
La plataforma marina que circunda a la península produce un moderado efecto de costa en un rango de períodos (T= 10 a 1000 s) que no se corresponde con los períodos (T= 1 a 10 s) que definen la anomalía conductora en las curvas de resistividad eléctrica aparentes observadas en las 22 estaciones MT.
Estos resultados le ofrecen una alta confiabilidad a los obtenidos del levantamiento MT, por lo que se proponen otras áreas, igualmente confiables, para ejecutar nuevas mediciones MT.
Citas
ARZATE J. A., O. DELGADO-RODRIGUEZ, J. O. CAMPOS-ENRIQUEZ and J. URRUTIA-FUCUGAUCHI, 2000. Electric structure of the Chicxulub impact basin along two magnetotelluric profiles. Submitted to Can. J. Earth Sci.
BERDICHEVSKY, M. N. and V. I. DMITRIV, 1976. Basic principles of interpretation of magnetotelluric sounding curves. A. Adam (Editor). Geoel. Geoth. Studies. KAPG Geophysical Monograph. Akademiai Kiado. Budapest, 165-221.
CAGNIARD, L., 1953. Basic theory of the magnetotelluric method of geophysical prospecting. Geophysics, 18, 605-635.
CAMPOS-ENRIQUEZ, J. O., J. A. ARZATE, J. URRUTIA-FUCUGAUCHI and O. DELGADO-RODRIGUEZ, 1997. The subsurface structure of the Chicxulub crater (Yucatan, Mexico): Preliminary results of a magnetotelluric study. The Leading Edge. 16, 1774-1777.
CHEN, J., H. W. DOSSO and M. INGHAM, 1990 Electromagnetic induction in New Zealand: Analogue model and field results. Phys. Earth Plant. Inter., 62, 257-270.
CONSTABLE, S. C., R. L. PARKER and C. G. CONSTABLE, 1987. Occam’s inversion: A practical algorithm for generating smooth models from electromagnetic sounding data. Geophysics, 52, 289-300.
DELGADO-RODRIGUEZ, O., J. O. CAMPOS-ENRIQUEZ, J. URRUTIA-FUCUGAUCHI and J. A. ARZATE, 2000. Occam and Bostick 1-D inversion of magnetotelluric soundings in the Chicxulub impact crater, Yucatan, Mexico. Submitted to Geofísica Internacional.
DOSSO, H. W. and Z. W. MENG, 1992. The coast effect response in geomagnetic field measurements. Phys. Earth Plant. Inter., 70, 39-56.
CONNORS, M., A. R. HILDEBRAND, M. PILKINGTON, C. ORTIZ-ALEMAN, R. E. CHAVEZ, J. URRUTIA-FUCUGAUCHI, E. GRANIEL-CASTRO, A. CAMARA-ZI, J. VASQUEZ and J. F. HALPENNY, 1996. Yucatan karst features and the size of Chicxulubcrater. Geophys. J. Int., 27, F11-F14.
ESPINDOLA, J. M., M. MENA, M. DE LA FUENTE and J. O. CAMPOS-ENRIQUEZ, 1995. A model of the Chicxulub impact structure (Yucatan, Mexico) based on its gravity and magnetic signatures. Phys. Earth Plant. Inter., 92, 271-278.
GOLDBERG, S. and Y. ROTSTEIN, 1982. A simple form of presentation of magnetotelluric data using the Bostick transform. Geophys. Prosp., 30, 211-216.
HEBERT, D., J. A. WRIGTH, H. W. DOSSO and W. NIENABER, 1983. Comparison of analogue model and field station results for the Newfoundland region. J. Geom. Geoelectr., 35, 673-682.
HILDEBRAND, A. R., G. T. PENFIELD, D. A. KRING, M. PILKINGTON, A. CAMARGO, S. JACOBSEN and W. BOYTON, 1991. Chicxulub crater: A possible Cretaceous/Tertiary boundary impact crater on the Yucatan Peninsula, Mexico. Geology, 19, 867-871.
HILDEBRAND, A. R., M. PILKINGTON, C. ORTIZ-ALEMAN, R. E. CHAVEZ, J. URRUTIA-FUCUGAUCHI, M. CONNORS, E. GRANIEL, A. CAMARA, J. F. HALPENNY and D. NIEHAUS, 1998. Mapping Chicxulub crater structure with gravity and seismic reflection data. In: Grady, M. M. et al. (Eds.), Meteorites: Flux with Time and Impact Effects, Geol. Soc., London, Sp. Publ., 140, 155-176.
KELLET, R. L., F. E. M. LILLEY and A. WHITE, 1991. A two-dimensional interpretation of the geomagnetic coast effect of southeast Australia, observed on land and sea-floor. Tectonophysics, 192, 367-382.
MENG, Z., H. W. DOSSO, L. K. LAW, F. W. JONES and V. RAMASWAMY, 1979. An analogue model study of E.M. induction in the North China-Korea coast region. Phys. Earth Planet. Inter., 60, 25-39.
NIENABER, W., H. W. DOSSO, L. K. LAW, F. W. JONES and V. RAMASWAMY, 1979. An analogue model study of electromagnetic induction in the Vancouver Island region. J. Geomag. Geoelectr., 31, 115-132.
MORGAN, J., M. WARNER and CHICXULUB WORKING GROUP, 1997. Size and morphology of the Chicxulub impact crater. Nature, 390, 472-476.
PARKINSON, W. D., 1959. Directions of rapid geomagnetic fluctuations. Geophys. J. R. Astron. Soc., 2, 1-14.
PARK, S. R., 1985. Distortion of magnetotelluric sounding curves by three-dimensional structures. Geophysics, 50, 785-797.
PENFIELD, G. T. and Z. A. CAMARGO, 1981. Definition of a major igneous zone in the central Yucatan platform with aeromagnetics and gravity. 51st Ann. Internat. Mtg. SEG, Abstract, 37.
PILKINGTON, M., A. R. HILDEBRAND and C. ORTIZ-ALEMAN, 1994. Gravity and magnetic field modeling and structure of the Chicxulub crater, Mexico. J. Geophys. Res. 99, 147-162.
SHARPTON, V. L., K. BURKE, A. CAMARGO, S. A. HALL, D. SCOTT-LEE, L. MARIN, G. SUAREZ, J. M. QUEZADA, P. D. SPUDIS and J. URRUTIA-FUCUGAUCHI, 1993. Chicxulub multiring impact basin: Size and other characteristics derived from gravity analysis. Science, 261, 1564-1567.
URRUTIA-FUCUGAUCHI, J., L. MARIN and A. TREJO-GARCIA, 1996. UNAM scientific drilling program of Chicxulub impact structure. Evidence for a 300 kilometer crater diameter. Geophys. Res. Lett., 23, 1565-1568.
VOZOFF, K., 1972. The magnetotelluric method in the exploration of sedimentary basins. Geophysics, 37, 98-141.
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