1887

Abstract

Summary

In connection to an environmental investigation of a former industrial site, the cretaceous sandy limestone bedrock in the surrounding area were mapped with resistivity and time domain induced polarization (DCIP). The aim of the DCIP survey was to delineate geological units and possible preferential pathways of DNAPL contaminated groundwater. Although IP anomalies corresponding to fractured crystalline bedrock have been observed previously and are commonly interpreted as results of clay weathering, there are not many studies of the IP behavior of limestone in previous research. In contrast to silicates, the weathering of calcite minerals in pure limestone results only in dissolution, without any weathering products in form of minerals. In this study, varying resistivity values and large IP anomalies were found in the sandy limestone bedrock, which are probable indications of weakness zones. The observed strong IP anomalies may be caused by calcite dissolution and precipitation processes or by clay mineral precipitation from chemical weathering of the silica grains contained in the sandy limestone. Another possibility may be sporadic presence of glauconitic sand in the limestone. More research is needed to confirm the sources of the observed anomalies.

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/content/papers/10.3997/2214-4609.201413756
2015-09-06
2024-04-25
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References

  1. Christiansen, W.
    [1984] The Albian to Maastrichtian of Southern Sweden and Bornholm, Denmark: a Review. Cretaceous Research, 5, 313–327.
    [Google Scholar]
  2. Dahlin, T. and Leroux, V.
    [2012] Improvement in time-domain induced polarization data quality with multi-electrode systems by separating current and potential cables. Near Surface Geophysics, 545–565.
    [Google Scholar]
  3. Engdahl, D., Larsson, N., Follin, S., Bank, A.
    [2010] Resultatrapport, fd Kemtvätt Färgaren 3. Report Number: 314881. Client: Kristianstad Municipality. Consult: Hifab AB, Stockholm. Unpublished.
    [Google Scholar]
  4. Gustafsson, O., Andersson, J-E., and De Geer, J.
    1979. Sammanställning av hydrogeologiska data från Kristianstadslätten. Sveriges Geologiska Undersökning Rapporter och meddelanden nr 12. 84 pp.
    [Google Scholar]
  5. Vinegar, H.J. and Waxman, M.H.
    [1984] Induced polarization of shaly sands. Geophysics, 49(8), 1267–1287.
    [Google Scholar]
  6. Pelton, W.H.
    . et al. [1978] Mineral discrimination and removal of inductive coupling with multifrequency IP. Geophysics, 43(3), 588–609.
    [Google Scholar]
  7. Magnusson, M.K., Fernlund, J.M.R. and Dahlin, T.
    [2010] Geoelectrical imaging in the interpretation of geological conditions affecting quarry operations. Bulletin of Engineering Geology and the Environment, 69(3), 465–486.
    [Google Scholar]
  8. Marescot, L., Monnet, R. and Chapellier, D.
    [2008] Resistivity and induced polarization surveys for slope instability studies in the Swiss Alps. Engineering Geology, 98(1–2), 18–28.
    [Google Scholar]
  9. Okay, G.
    . et al. [2013] Localization and characterization of cracks in clay-rocks using frequency and time-domain induced polarization. Geophysical Prospecting, 61(1), 134–152.
    [Google Scholar]
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