1887

Abstract

Summary

Data from AEM survey, carried out in the Peace Region of NE British Columbia to support groundwater investigation, were used in this study. An understanding of the geological structures can have significant implication in groundwater management decisions. Previous studies have demonstrated the presence of shallow aquifers specifically those within paleovalleys. In this study we present different inversion strategies and their geological modelling implications. The aim was to obtain geophysical models that have better resolved electrical resistivity units. This, therefore, should allow more straightforward geological interpretation.

Different types of geophysical inversions on synthetic data have been performed. Testing different settings, for each inversion strategy permitted to study how the final geophysical model could change. This workflow was applied to real data over a subset collected in the south-western part of the Peace Region, an area characterized by different buried valleys.

Sharp Laterally Constrained inversions have been thoroughly investigated. The sharp result is very sensitive to settings choice: sharp inversion with tight settings allows to recognition of the basic electrical resistivity blocks of the model, on the other hand, sharp-inversion with loose settings allows to obtain resistivity variations within the blocks. We present a rough geological interpretation on a representative cross section.

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/content/papers/10.3997/2214-4609.201802508
2018-09-09
2024-03-28
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References

  1. Auken, E., A.V.Christiansen, J.H.Westergaard, C.Kirkegaard, N.Foged, and A.Viezzoli
    . 2009. An integrated processing scheme for high-resolution airborne electromagnetic surveys, the SkyTEM system. Exploration Geophysics40: 184–192.
    [Google Scholar]
  2. JørgensenF., MenghiniA., Juhl KallesoeA., VignoliG., ViezzoliA. & StigA. SchackPedersen
    2016. Structural geology of folded terrain in the Rocky Mountains’ foothills interpreted from SkyTEM. A preliminary study of SkyTEM data collected in the Peace region, NE British Columbia, Canada in “Danmarks og Grønlands Geologiske undersogelse rapport 2016\34”, 2–21.
    [Google Scholar]
  3. Viezzoli, A., Christiansen, A. V., Auken, E., and Sørensen, K.
    , 2008, Quasi-3D modeling of airborne TEM data by spatially constrained inversion: Geophysics, 73(3), F105–F113.
    [Google Scholar]
  4. ViezzoliA., MenghiniA., JørgensenF., HøyerA.S.
    2018. Processing and inversion of SkyTEM data leading to a hydrogeological interpretation of the Peace River North-Western Area. Report 2018-06, 2–27. Freely downloaded from Geoscience BC website: http://www.geosciencebc.com/s/PeaceProject.asp
    [Google Scholar]
  5. VignoliG., SapiaV., MenghiniA. and ViezzoliA.
    2017. Examples of Improved Inversion of Different Airborne Electromagnetic Datasets Via Sharp Regularization. Journal of Environmental and Engineering Geophysics, JEEG, March2017, Vol. 22, 51–61.
    [Google Scholar]
  6. Vignoli, G., Fiandaca, G., Christiansen, A.V., KirkegaardandC., Auken, E.
    , 2014, Sharp spatially constrained inversion with applications to transient electromagnetic data, Geophysical Prospecting, 1–13.
    [Google Scholar]
  7. Zhdanov, M. S.
    , 2002, Geophysical inverse theory and regularization problems: Elsevier Science & Technology.
    [Google Scholar]
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