1887

Abstract

Summary

Seismic characterization of the shape and the infill of overdeepened Alpine valleys have been conducted in the past with great success using P-waves. In advance of an ICDP drilling project the Leibniz Institute of Applied Geophysics evaluates the potential of S-wave imaging for this task at two test locations.

We achieved quite different results regarding the SH-wave seismic technique. In one test area we recorded very good results enabling us to differentiate facies inside the sediments from only several m below the surface up to the base of the basin at ∼200 m depth. Here, the very near surface information clearly supplements the information of the P-wave survey. Most of the information in SH-wave sections comes from relatively small offsets, enabling a way to efficient 3D sampling. However, other profiles in this location do not allow a sediment differentiation due to disturbing surface waves. In the other test area, reflected energy as deep as 600 m could be recovered, however we were not able up to now to focus it into interpretable sections.

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/content/papers/10.3997/2214-4609.201802607
2018-09-09
2020-07-06
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References

  1. Anselmetti, F., Preusser, F., Bavec, M., Crouzet, C., Fiebig, M., Gabriel, G., Ravazzi, C., Spötl, C.
    (2016). Drilling Overdeepened Alpine Valleys (DOVE). ICDP full proposal, 174pp.
    [Google Scholar]
  2. Burschil, T., Buness, H., Tanner, D.C., Gabriel, G., & Krawczyk, C.M.
    (2017). Seismic Facies Characterization of the Overdeepened Glacial Tannwald Basins. 24th European Meeting of Environmental and Engineering Geophysics, Malmö, Sweden.
    [Google Scholar]
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