1887

Abstract

Summary

In order to infer the sedimentological properties of saturated samples of alluvial deposits, a cluster analysis is applied on spectral induced polarization data (amplitude and phase resistivity spectra). The hierarchical tree of clusters is dissected and analyzed at different aggregation levels, comparing the electrical and sedimentological intra-cluster variability. A low number of clusters densely populated guarantees a perfect allocation into cluster on the base of a few electrical parameters but permits to obtain only a rough textural characterization of the sample, while increasing the number of clusters yields to reduce the variability intervals of the textural parameters and of the chemical properties of the saturation water within each cluster, thus reducing the uncertainty in their estimation. An excessively large number of clusters is ineffective since the uncertainly in the assignment of a sample to a specific cluster is too high. These results can be used as an indirect tool for sediments characterization and have been successfully tested on an independent sample. The cluster analysis allowed to use the whole spectral information to establish a link between geological and geophysical parameters, avoiding the use of one-to-one correlations, whose validity has not yet been confirmed for natural unconsolidated materials.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201413696
2015-09-06
2021-04-16
Loading full text...

Full text loading...

References

  1. Bairlein, K., Hördt, A. and Nordsiek, S.
    [2014] The influence on sample preparation on spectral induced polarization of unconsolidated sediments. Near Surface Geophysics, 12, 2036, 667–677.
    [Google Scholar]
  2. Inzoli, S., Giudici, M., Mele, M. and Rondolini, E.
    [2014] Complex electrical properties of sand-clay mixtures and alluvial sediment samples. Near Surface Geoscience 2014 — 20th European Meeting of Environmental and Engineering Geophysics, Athens, Greece.
    [Google Scholar]
  3. Kemna, A., Binley, A., Cassiani, G., Niederleithinger, E., Revil, A., Slater, L., Williams, K. H., Flores Orozco, A., Haegel, F.H., Hördt, A., Kruschwitz, S., Leroux, V., Titov, K. and Zimmermann, E.
    [2012] An overview of the spectral induced polarization method for near-surface applications. Near Surface Geophysics, 10, 6, 453–468.
    [Google Scholar]
  4. Zimmermann, E., Kemna, A., Berwix, J., Glaas, W., MunchH. M. and Huisman, J.A.
    [2008] A high-accuracy spectrometer for measuring sediments with low polarizability. Measurement Science and Technology, 19, 105603.
    [Google Scholar]
  5. Zisser, N., Kemna, A. and Nover, G.
    [2010] Relationship between low-frequency electrical properties and hydraulic permeability of low-permeability sandstones. Geophysics, 75, 3, E131–E141.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201413696
Loading
/content/papers/10.3997/2214-4609.201413696
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