1887
3D Electromagnetics
  • ISSN: 2202-0586
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Abstract

A geoelectric model is proposed for the central part of Parana Basin. A major part of the intracratonic basin has one of the most voluminous flood basalt inshore complex up to 2 km thick, covering an area of some 800,000 km2. The basalt overlies a series of Paleozoic sediments including hydrocarbon source rocks. This paper presents a three-dimensional (3-D) geoelectric model for the central portion of the basin, based on a dataset comprising 136 broadband magnetotelluric (MT) sites with a frequency range spanning from 0.003 Hz to 250 Hz, covering an area of 120,000 km2. The MT sites were deployed along 8 profiles running SW-NE profiles and one NW-SE profile. The obtained model reveals the sedimentary basin structure through its basement, reaching lower crustal depths. In particular it has revealed a more complex structure for the Ponta Grossa Arch than the models previously thought. There is some indication of accretion of mantle materials in the base of the crust. This is suggested by oscillations in thickness of the crust and zoning of enhanced conductivity values. The results emphasize the feasibility of 3-D forward modeling in practice

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2003-04-01
2026-01-25

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References

  1. Bahr, K., 1991, Geological noise in magnetotelluric data: a classification of distortion types: Phys. Earth and Planet. Inter., 66, 24-38.
  2. Beamish, D., and Travassos, J. M., 1992a, The use of the D+ solution in magnetotelluric interpretation: J. Appl. Geophys.,29, 1-19.
  3. Beamish, D., and Travassos, J. M., 1992b, A study of static shift removal from magnetotelluric data: J. Appl. Geophys., 29,157-178.
  4. Beamish, D., and Travassos, J. M., 1992c, Magnetotelluric imaging of basalt-covered sediments: First Break, 10, 345-357.
  5. Beamish, D., and Travassos, J. M., 1993a, A study of magnetotelluric static distortion in the context of intrusive volcanism: Geophys. Prosp., 41, 61-82.
  6. Beamish, D., and Travassos, J. M., 1993b, Magnetotelluric studies from two contrasting Brazillian basins: a reassessment of old data: Phys. Earth Planet. Int., 81, 261-276.
  7. Brown, C. 1994, Tectonic interpretation of regional conductivity anomalies: Survey in Geophysics, 15, 123-157.
  8. Carrasquilla, A., Prata, F., and Travassos, J. M., 1999, Three-dimensional magnetotelluric modeling of mariopolis area in Paraná basin-south of Brazil: Second International Symposium on Three-Dimensional Electromagnetics, Salt Lake City, USA.
  9. Ceia, M. A. R., 1997, Modelo geoelétrico da região próxima a Canoinhas, SC, Bacia do Paraná: MSc thesis, CNPq-Observatorio Nacional, Rio de Janeiro.
  10. Chave, A. D. and Thomson, D. J., 1989, Some coments on magnetotelluric response function estimation: J. Geophys. Res., 94, 14215-14255.
  11. Conceição, J. C. J., Zalán, P. V. and Wolff, S., 1988, Mecanismo, evolução e cronologia do rift Sul-Atlântico: Bol. Geoc. Petrobrás, 2, 255-265.
  12. Cordani, U. G., Neves, B. B. B., Fuck R. A., Porto R., Thomaz Filho A. and Cunha, F. M. B., 1984, Estudo preliminar de integração do Pre-Cambriano com os eventos tectônicos das bacias sedimentares brasileiras: Rev. Cienc. Tec. Petrobrás no 15, Petrobrás, CENPES, CINTEP.
  13. Duba, A. G. and Shankland, T. J., 1982, Free carbon and electrical conductivity in the earth’s mantle: Geophys., Res. Lett, 9, 1271-1274.
  14. Ferreira, F. J. F., 1982, Alinhamentos estruturais magneticos da região centro-sul da Bacia do Paraná e seu significado tectônico, In: Geologia da Bacia do Parana: IPT SpecialPubl, 12, Sã o Paulo, IPT, 143-166.
  15. Ferreira, F. J. F., Blum, M. L. B., Forlim, M., Soares, P. C. and Rostirolla, S. P., 1996, Superfície Curie da região de Fartura: Anais 39 Cong. Bras. Geologia, SBG, Salvador.
  16. Fulfaro, V. J., Saad, A. R., Santos, M. V. and Vianna, R. B., 1982, Compartimentação e evolucao da Bacia do Parana: Revista Brasileira de Geociências, 12, 590-611.
  17. Gough, T. I., 1992, Electromagnetic exploration for fluids in the earth’s crust: Earth Sci. Rev., 32, 3-18.
  18. Glover, P. W. J. and Vine, F. J., 1995, Beyond KTB-electrical conductivity of the continental crust: Survey in Geophysics, 16, 5-36.
  19. Glover, P. W. J., Vine, F. J. and Ross, R. G., 1990, Measurements of saturated basic and acidic rock electrical conductivities at lower crustal temperatures and high pressures: Hi. Press., 5, 735-737.
  20. Groom, R. W. and Bailey, R. C, 1989, Decomposition of magnetotelluric impedance tensors in the presence of local three-dimensional galvanic distortion: J. Geophys. Res., 93, 1913-1925.
  21. Haak, V. and Hutton, R., 1986, Electrical resistivity in continental lower crust, In: J.B. Dawson, DA. Carswell, J. Hall, and K.D. Wedepohl (Editors), Nature of Lower Continental Crust: Geol. Soc. Spec. Publ. London 24, 35-19.
  22. Hyndman, R. D. and Shearer, P. M., 1989, Water in the lower continental crust: modeling magnetotelluric and seismic reflection studies: Geophys. J. Int., 98, 343-365.
  23. Jiracek, G. R., 1990, Near surface and topographic distortion in electromagnetic indction: Survey in Geophys., 11,163-203.
  24. Jones, A. G., 1988, Static shift of magnetotelluric data and its removal in a sedimentary basin environment: Geophysics, 53, 967-978.
  25. Jones, A. G., 1992, Electrical conductivity of the continental lower crust. In: D.M. Fountain, R.J. Arculus, and R.W. Kay (Editors), Elsevier, Amsterdam, 81-143.
  26. Mackie, R. L., Madden, T. R. and Wannamaker, P. E., 1993, Three-dimensional magnetotelluric modeling using difference equations - Theory and comparisons to integral equation solutions: Geophys., 58, 215-229.
  27. Mareschal, M., Fyfe, W. S., Percival, J. and Chan, T., 1992, Grain boundary graphite in Kapuskasing gneisses and implications for lower crust in the southern British Columbia: Geophys. Journal Int., 120, 111-131.
  28. Menezes, P. T. L. 1996, Estrutura geoelétrica da porção Norte do Arco de Ponta Grossa, Bacia do Paraná: PhD thesis, CNPq-Observatório Nacional, Rio de Janeiro.
  29. Menezes, P. T. L. and Travassos, J. M., 2000, An audiomagnetotelluric survey across an outcropping dike: PAGEOPH, 157, 1857-1872.
  30. Milani, E. J., 1997, Evolução tectono-estratigráfica da Bacia do Parana e seu relacionamento com a geodinámica fanerozoica do Gondwana sul-ocidental: PhD thesis, Institute de Geociáncias, Universidade Federal do Rio Grande do Sul.
  31. Milani, E. J. and Ramos, V. A., 1998, Orogenias paleozóicas no dominio sul-ocidental do Gondwana e os ciclos de subsidáncia da Bacia do Parana: Revista Brasileira de Geociencias, 28, 473-484.
  32. Molina, E. C, Ussami, N., Sá, N. C, Blitzkow, D. and Miranda Filho, O. F., 1988, Deep crustal strucutre under the Paraná basin (Brazil) from gravity study. In: E.M. Piccirillo, and A.J. Melfi (Editors) The Mesozoic flood volcanism of the Parana Basin, petrogenetic and geophysical aspects: São Paulo, Univ. Sao Paulo, 271-283.
  33. Northfleet A. A., Medeiros R. A. and Muhlmann H., 1969, Reavaliação dos dados geologicos da Bacia do Parana: Boletim Tecnico da Petrobras, 12, 291-346.
  34. Oliveira, L. O. A., 1989, Aspectos da evolução Termomecanica da Bacia do Parana no Brasil: Revista Brasileira de Geociáncias, 19,330-346.
  35. Petri, S., Fulfaro, V. J., 1983, Geologia do Brasil: Sao Paulo, Univ. Sao Paulo, Ed., 632 p.
  36. Piccirillo, E. M., Melfi, A. J., Comin-Chiaramonti, P., Bellieni, G., Ernesto, M., Marques, L. S., Nardy, A. J. R., Pacca, I. G., Roisenberg, A. and Stolfa, D., 1988a, Continental flood volcanism from the Parana Basin (Brazil). In: J.D. Macdougall (Editor) Continental Flood Basalts: Dordrecht, Kluwer Academic Publ., 195-238.
  37. Piccirillo E. M., Bellieni G., Comin-Chiaramonti P., Ernesto M., Melfi A. J., Pacca, I. G. and Ussami N., 1988b, Significance of the Paraná flood volcanism in the disruption of Western Gondwanaland. In: E.M. Piccirillo, and AJ. Melfi (Editors). The Mesozoic flood volcanism of the Paraná Basin: petrogenetic and geophysical aspects: São Paulo, Univ. São Paulo, 285-295.
  38. Quintas, M. C. L., Mantovani, M. S. M. and Zalán, P. V., 1999. Contribuição ao estudo da evolucao mecânica da Bacia do Paraná: Rev. Bras. Geociáncia, 29,217-226.
  39. Ramos, R. G. N., 1988. Análise da transformação de Bostick-Niblett na interpretação de sondagens magnetotelúricas: aplicacao a dados da Bacia do Paraná: MSc. Thesis. UFBa, 148p.
  40. Raposo, M. I. B. and Ernesto, M., 1995, An Early Cretaceous paleomagnetic pole from the Ponta Grossa dikes (Brazil): implication for the South America Mesozoic APWP: J. Geophys. Res., 100, 20095-20109.
  41. Renne, P. R., Ernesto, M., Pacca, I. G., Nardy, A. J. R., Coe, R.S., Glen, J.M., Prevot, M. and Pen-in, M., 1992, Rapid eruption of the Parana flood volcanics, rifting of southern Gondwanaland and the Jurassic-Cretaceous boundary: Science, 258, 975-979.
  42. Rocha, P.F.L, Braga, L.F.L., Hamza, V, 1997, Profundidade da temperatura Curie estimada por dados aeromagnéticos e geotérmicos: Anais do V Simp. Geologia Sudeste, 43.
  43. Rodi, W. and Mackie, R. L., 2001, Nonlinear conjugate gradients algorithm for 2-D magnetotelluric inversion: Geophys., 66, 174-187.
  44. Sá, N. C, Ussami, N. and Molina, E.C., 1993,. Gravity map of Brazil I, representation of free-air and Bouguer anomalies: J. Geophys. Res., 102,2187-2198.
  45. Santos, M. V. and Saad, A. R., 1982, Mapa estrutural da Bacia do Paraná, In: Geologia da Bacia do Paraná: Paulipetro (CESP/TPT), Annex, São Paulo, Brasil.
  46. Schawarz, G., 1990, Electrical conductivity of the earth’s crust and upper mantle. Survey in geophysics, 11, 133-161.
  47. Shankland, T. J., Duba, A. G., Mathez, E. A. and Peach, C. L., 1997, Increase of electrical conductivity with pressure as an indicator of conduction through a solid phase in midcrustal rocks: J. Geophys. Res. 102, 14741- 14750.
  48. Stanley, W. D., Saad, A. R. and Ohofugi, W., 1985, Regional magnetoteluric surveys in hydrocarbon exploration, Parana Basin, Brazil: Bull. Am. Ass. Petrol. Geol., 69, 346-360.
  49. Stodt, J. A., 1983, Processing of conventional and remote reference magnetotelluric data: PhD thesis, University of Utah.
  50. Travassos, J. M. and Beamish, D., 1988, Magnetotelluric data processing-a case study: Geophys. J. Int., 93, 377-391.
  51. Ussami, N., Sá, N. C. and Molina, E. C, 1993, Gravity map of Brazil 2, Regional-residual isostatic anomalies and their correlation with major tectonic provinces: J. Geophys. Res., 102,2199-2208.
  52. Vidotti, R. M., Ebinger, C. J. and Fairhead, J. D., 1998, Gravity signature of the western Parnaná basin, Brazil: Earth and Planetary Sci. Letters, 159, 117-132.
  53. Wannamaker, P. E., 2000, Comment on "The petrologic case for a dry lower crust", by B.D. Yardley and J.W. Valley: J. Geophys. Res. 105, 6057-6064.
  54. Wannamaker, P. E. and Hohmann, G. W., 1991, Electromagnetic induction studies: U.S. National Rep. to IUGG: Rev. Geophys., 405-415, supplement.
  55. Zalán, P. V., Wolff, S., Astolfi, M. A. M., Vieira, I. S., Conceição, J. C. J., Appi, V. T., Neto, E. V. S., Cerqueira, J. R. and Marques, A., 1990, The Parana basin, Brazil, In: M.W. Leighton, D.R. Kolata, D.F. Olts, JJ. Eidel (Eds.), Interior Cratonic Basins: AAPG Mem. 51,681-708.
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  • Article Type: Research Article
Keyword(s): 3-D modeling; magnetotellurics; Paraná Basin; Ponta Grossa Arch

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