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Abstract

Summary

3D seismic reflection data were acquired in the Kylylahti polymetallic mine in the Outokumpu mining district of Eastern Finland within the framework of ERA-MIN COGITO-MIN project. A mix of dynamite and Vibroseis sources was used forming a sparse and irregular pattern. Data were processed by a conventional workflow up to post-stack/pre-stack time migration, which provided a suboptimal image of the steeply-dipping Kylylahti formation. Depth imaging followed with a standard Kirchhoff pre-stack depth migration (PreSDM) and coherency-based Fresnel Volume Migration (CBFVM) using smooth velocity model obtained from the first-arrival tomography. With this approach, we were able to image the base of the Kylylahti formation as verified by a match with a borehole-constrained geological model, as well as its internal reflectivity structure with shallow, steeply-dipping reflectors.

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/content/papers/10.3997/2214-4609.201900760
2019-06-03
2024-03-29
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References

  1. Bellefleur, G., Schetselaar, E., White, D. and Dueck, P.
    [2015] 3D Seismic imaging of the Lalor volcanogenic massive sulphide deposit, Manitoba, Canada. Geophysical Prospecting, 63(4), 813–832.
    [Google Scholar]
  2. Buske, S., Gutjahr, S. and Sick, C.
    [2009] Fresnel volume migration of single-component seismic data. Geophysics, 74(6), WCA47–WCA55.
    [Google Scholar]
  3. Heinonen, S., Malinowski, M., Hloušek, F., Gislason, G., Koivisto, E., Buske, S. and COGITO-MIN Working Group
    [2018] Seismic Exploration in The Kylylahti Cu-Au-Zn Mining Area: Comparison of Time and Depth Imaging Approaches. EAGE 2nd Conference on Geophysics for Mineral Exploration and Mining 2018, Extended Abstract, Tu 2MIN P01.
    [Google Scholar]
  4. Hloušek, F. and Buske, S.
    [2016] Fresnel Volume Migration of the ISO89-3D data set. Geophysical Journal International, 207(2), 1273–1285.
    [Google Scholar]
  5. Hloušek, F., Hellwig, O. and Buske, S.
    [2015a] Three-dimensional focused seismic imaging for geothermal exploration in crystalline rock (Schneeberg, Germany). Geophysical Prospecting, 63(4), 999–1014.
    [Google Scholar]
  6. [2015b] Improved structural characterization of the Earth's crust at the German Continental Deep Drilling Site using advanced seismic imaging techniques. Journal of Geophysical Research: Solid Earth, 120(10), 6943–6959.
    [Google Scholar]
  7. Koivisto, E., Malinowski, M., Heinonen, S., Cosma, C., Wojdyla, M., Vaittinen, K., Chamarczuk, M., Riedel, M., Kukkonen, I. and the COGITO-MIN Working Group
    [2018] From Regional Seismics to High-Resolution Resource Delineation: Example from the Outokumpu Ore District, Eastern Finland. EAGE 2nd Conference on Geophysics for Mineral Exploration and Mining 2018, Extended Abstract, Tu 2MIN P04.
    [Google Scholar]
  8. Kontinen, A., Peltonen, P. and Huhma, H.
    [2006] Description and genetic modelling of the Outokumputype rock assemblage and associated sulphide deposits. Final technical report for GEOMEX JV, Workspackage Geology, Geological Survey of Finland (Report M10.4/2006/1).
    [Google Scholar]
  9. Luhta, T.
    [2019] Petrophysical properties of the Kylylahti Cu-Au-Zn sulphide mineralization and its host rocks. Masters’ Thesis, University of Helsinki.
    [Google Scholar]
  10. Podvin, P. and Lecomte, I.
    [1991] Finite difference computation of traveltimes in very contrasted velocity models: a massively parallel approach and its associated tools. Geophysical Journal International, 105(1), 271–284.
    [Google Scholar]
  11. Zelt, C.A. and Barton, P.J.
    [1998] 3D seismic refraction tomography: A comparison of two methods applied to data from the Faeroe basin. Journal of Geophysical Research, 103(B4), 7187–7210.
    [Google Scholar]
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