Effects of galvanic distortion on magnetotelluric data over a three-dimensional regional structure

Geophysical Journal International

Volumn 132, Issue 2, 1998, Pages 295-301

  Ledo, Juanjo ^a   Queralt, Pilar ^a   Pous, Jaume ^a  

^a UNIVERSITY OF BARCELONA   (Spain)

Author keywords

Electrical resistivity; Magnetotellurics; Structural dimensionality; Tensor decomposition

Indexed keywords

ELECTRICAL METHOD; GALVANIC DISTORTION; MAGNETOTELLURICS; RESISTIVITY;

EID: 0031833766     PISSN: 0956540X     EISSN: None     Source Type: Journal    
DOI: 10.1046/j.1365-246x.1998.00417.x     Document Type: Article

References (19)

1. Bahr, K., 1988. Interpretation of the magnetotelluric impedance tensor: regional induction and local telluric distortion, J. Geophys., 62, 119-127.
2. Bahr, K., 1991. Geological noise in magnetotelluric data: a classification of distortion types, Phys. Earth planet. Inter., 66, 24-38.
3. Berdichevsky, M.N. & Dmitriev, V.I., 1976. Basic principles of interpretation of magnetotelluric sounding curves, in Geoelectric and Geothermal Studies, pp. 165-221, ed. Adam, A., KAPG Geophysics Monographs, Akademiai Kiado, Budapest.
4. Chakridi, R., Chouteau, M. & Marechal M., 1992. A simple technique for analysing and partly removing galvanic distortion from the magnetotelluric impedance tensor: application to Abitibi and Kapuskasing data (Canada), Geophys. J. Int., 108, 917-929.
5. Chave, A.D. & Smith, J.T., 1994. On electric and magnetic galvanic distortion tensor decompositions, J. geophys. Res., 99, B3, 4669-4682.
6. Groom, R.W. & Bahr, K., 1992. Corrections for near surface effects: decomposition of the magnetotelluric impedance tensor and scaling corrections for regional resistivities: a tutorial, Geophys. Surv., 13, 341-379.
7. Groom, R.W. & Bailey, R.C., 1989. Decomposition of magnetotelluric impedance tensor in the presence of local three-dimensional galvanic distortion, J. geophys. Res., 94, 1913-1925.
8. Groom, R.W. & Bailey, R.C., 1991. Analytical investigations of the effects of near-surface three-dimensional galvanic scatterers on MT tensor decomposition, Geophysics, 56, 496-518.
9. Jiracek, G., 1990. Near-surface and topographic distortions in electromagnetic induction, Surv. Geophys., 11, 163-203.
10. Jones, A.G., 1983. The problem of 'current channeling': a critical review, Geophys. Surv., 6, 79-122.
11. Jones, A.G., 1988. Static shift of magnetotelluric data and its removal in a sedimentary basin environment, Geophysics, 53, 967-978.
12. Jones, A.G. & Groom, R.G., 1993. Strike-angle determination from the magnetotelluric impedance tensor in the presence of noise and local distortion: rotate at your peril!, Geophys. J. Int., 113, 524-534.
13. Mackie, R.L., Smith, J.T. & Madden, T.R., 1994. Three-dimensional electromagnetic modeling using finite difference equations: the magnetotelluric example, Radio Sci., 29, No. 4, 923-935.
14. Pous, J., Ledo, J., Marcuello, A. & Daignières, M., 1995. Electrical resistivity model of the crust and upper mantle from a magnetotelluric survey through the central Pyrenees, Geophys. J. Int., 121, 750-762.
15. Price, A.T., 1973. The theory of geomagnetic induction, Phys. Earth planet. Inter., 7, 227-233.
16. Smith, J.T., 1995. Understanding telluric distortion matrices, Geophys. J. Int., 122, 219-226.
17. Swift, C.M., 1967. A magnetotelluric investigation of an electric conductivity anomaly in the south western United States, PhD thesis, Massachusetts Institute of Technology, Cambridge, MA.
18. West, G.F. & Edwards, R.N., 1985. A simple parametric model for the electromagnetic response of an anomalous body in a host medium, Geophysics, 50, 2542-2559.
19. Zhang, P., Pedersen, L.B., Mareschal, M. & Chouteau, M., 1993. Channeling contribution to tipper vectors: a magnetic equivalent to electrical distortion, Geophys. J. Int., 113, 693-700.