1887

Abstract

Summary

In this work we present a novel joint inversion scheme of Electrical and Electromagnetic (E&EM) data based on the full integration of system transfer functions and the decoupling of forward and model meshes. The EM data are modelled in 1D, while the galvanic data in 2D. The resulting joint models achieved unprecedented resolution and revealed entirely new resistivity structures, undetected in the independent models, while preserving a good data fit. This new joint inversion scheme has been applied to ten field survey across Europe and along the CSIRO Airborne EM calibration line at Perth, Western Australia. The validation of the independent and joint models is carried out with borehole comparison featured by both lithological description and logEM measurements. We believe that the E&EM joint inversion developed and applied in this study represents a breakthrough in the state of the art of galvanic and inductive investigations, pushing a significant step forward in high-resolution near-surface studies.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.202520256
2025-09-07
2026-02-15
Loading full text...

Full text loading...

References

  1. Albouy, Y., Andrieux, P., Rakotondrasoa, G., Ritz, M., Descloitres, M., Join, J.-L., Rasolomanana, E., 2001. Mapping Coastal Aquifers by Joint Inversion of DC and TEM Soundings-Three Case Histories. Groundwater39, 87–97. https://doi.org/10.1111/j.1745-6584.2001.tb00354.x
    [Google Scholar]
  2. Christensen, N.B., 2000. Difficulties in determining electrical anisotropy in subsurface investigations. Geophysical Prospecting. 48(1), 1–19.
    [Google Scholar]
  3. Christiansen, A.V., Auken, E., Viezzoli, A., 2011. Quantification of modeling errors in airborne TEM caused by inaccurate system description. GEOPHYSICS76, F43–F52. https://doi.org/10.1190/1.3511354
    [Google Scholar]
  4. FiandacaG., RammJ., BinleyA., GazotyA., ChristiansenA.V. & AukenE., 2013. Resolving spectral information from time domain induced polarization data through 2-D inversion, Geophysical Journal International, 192, 631–646. https://doi.org/10.1093/gji/ggs060
    [Google Scholar]
  5. Fiandaca, G., Chen, J., Zhang, B., 2024. EEMverter, a New Modelling Tool for Electric and Electromagnetic Data with Focus on Induced Polarization, in: NSG 2024 30th European Meeting of Environmental and Engineering Geophysics, Helsinki, Finland, pp. 1–5. https://doi.org/10.3997/2214-4609.202420166
    [Google Scholar]
  6. Lane, R., Green, A., Golding, C., Owers, M., Pik, P., Plunkett, C., Sattel, D., Thorn, B., 2000. An example of 3D conductivity mapping using the TEMPEST airborne electromagnetic system. Exploration Geophysics31, 162–172. https://doi.org/10.1071/EG00162
    [Google Scholar]
  7. Madsen, L.M., Fiandaca, G., Auken, E., 2020. 3-D time-domain spectral inversion of resistivity and full-decay induced polarization data—full solution of Poisson's equation and modelling of the current waveform. Geophysical Journal International223, 2101–2116. https://doi.org/10.1093/gji/ggaa443
    [Google Scholar]
  8. Meju, M.A., 2005. Simple relative space–time scaling of electrical and electromagnetic depth sounding arrays: implications for electrical static shift removal and joint DC‐TEM data inversion with the most‐squares criterion. Geophysical Prospecting53, 463–479. https://doi.org/10.1111/j.1365-2478.2005.00483.x
    [Google Scholar]
  9. Vozoff, K., Jupp, D.L.B., 2007. Joint Inversion of Geophysical Data. Geophysical Journal of the Royal Astronomical Society42, 977–991. https://doi.org/10.1111/j.1365-246X.1975.tb06462.x
    [Google Scholar]
  10. Ward, S.H., Hohmann, G.W., 1988. Electromagnetic Methods in Applied Geophysics: Voume 1, Theory. Society of Exploration Geophysicists. https://doi.org/10.1190/1.9781560802631
    [Google Scholar]
/content/papers/10.3997/2214-4609.202520256
Loading
/content/papers/10.3997/2214-4609.202520256
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error