Mapping biogeochemically active zones at the catchment-scale with induced polarization

A. Flores Orozco; T. Katona; J. Gallistl; B. Gilfedder; M. Bücker; S. Frei; L. Pavlin; P. Blaschke; P. Strauss; G. Blöschl

doi:10.3997/2214-4609.202120125

Mapping biogeochemically active zones at the catchment-scale with induced polarization

A. Flores Orozco, T. Katona, J. Gallistl, B. Gilfedder, M. Bücker, S. Frei, L. Pavlin, P. Blaschke, P. Strauss, G. Blöschl

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › Academic

Abstract

We demonstrate the application of the induced polarization (IP) imaging method to map biogeochemical hot-spots at the catchment scale. Measurements were collected at the Hydrological Open Air Laboratory (HOAL), a 66 ha. research field. Data collected across the entire site reveal relative modest electrical conductivity values (between 60 and 80 mS/m) and low polarization values (quadrature conductivity < 0.5 mS/m) corresponding to the soils with high fractions of fine grains (silt and clay content over 70%).

Our results focus on a selected location, where measurements revealed a polarization anomaly (quadrature conductivity > 1 mS/m and conductivity phase above 20 mrads). Mapping IP lines permitted to delineate the geometry of the IP anomaly and select the location for the drilling of boreholes. Analysis of the sediments revealed high carbon and iron concentrations, as expected for a biogeochemically active area; however, negligible concentration of sulfides or magnetite which are the common IP targets. Although the polarization mechanism is open to debate, our results demonstrate the applicability of the IP method as a diagnosis tool to delineate in-situ biogeochemical activity in metal-free media.

Original language	English
Title of host publication	NSG2021 1st Conference on Hydrogeophysics
Publisher	European Association of Geoscientists and Engineers, EAGE
Pages	1-5
DOIs	https://doi.org/10.3997/2214-4609.202120125
Publication status	Published - 2021
Externally published	Yes

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Flores Orozco, A., Katona, T., Gallistl, J., Gilfedder, B., Bücker, M., Frei, S., Pavlin, L., Blaschke, P., Strauss, P., & Blöschl, G. (2021). Mapping biogeochemically active zones at the catchment-scale with induced polarization. In NSG2021 1st Conference on Hydrogeophysics (pp. 1-5). European Association of Geoscientists and Engineers, EAGE. https://doi.org/10.3997/2214-4609.202120125

@inproceedings{05066075a7d245b69bbcaec893c22305,

title = "Mapping biogeochemically active zones at the catchment-scale with induced polarization",

abstract = "We demonstrate the application of the induced polarization (IP) imaging method to map biogeochemical hot-spots at the catchment scale. Measurements were collected at the Hydrological Open Air Laboratory (HOAL), a 66 ha. research field. Data collected across the entire site reveal relative modest electrical conductivity values (between 60 and 80 mS/m) and low polarization values (quadrature conductivity < 0.5 mS/m) corresponding to the soils with high fractions of fine grains (silt and clay content over 70%).Our results focus on a selected location, where measurements revealed a polarization anomaly (quadrature conductivity > 1 mS/m and conductivity phase above 20 mrads). Mapping IP lines permitted to delineate the geometry of the IP anomaly and select the location for the drilling of boreholes. Analysis of the sediments revealed high carbon and iron concentrations, as expected for a biogeochemically active area; however, negligible concentration of sulfides or magnetite which are the common IP targets. Although the polarization mechanism is open to debate, our results demonstrate the applicability of the IP method as a diagnosis tool to delineate in-situ biogeochemical activity in metal-free media.",

author = "{Flores Orozco}, A. and T. Katona and J. Gallistl and B. Gilfedder and M. B{\"u}cker and S. Frei and L. Pavlin and P. Blaschke and P. Strauss and G. Bl{\"o}schl",

year = "2021",

doi = "10.3997/2214-4609.202120125",

language = "English",

pages = "1--5",

booktitle = "NSG2021 1st Conference on Hydrogeophysics",

publisher = "European Association of Geoscientists and Engineers, EAGE",

}

Flores Orozco, A, Katona, T, Gallistl, J, Gilfedder, B, Bücker, M, Frei, S, Pavlin, L, Blaschke, P, Strauss, P & Blöschl, G 2021, Mapping biogeochemically active zones at the catchment-scale with induced polarization. in NSG2021 1st Conference on Hydrogeophysics. European Association of Geoscientists and Engineers, EAGE, pp. 1-5. https://doi.org/10.3997/2214-4609.202120125

TY - GEN

T1 - Mapping biogeochemically active zones at the catchment-scale with induced polarization

AU - Flores Orozco, A.

AU - Katona, T.

AU - Gallistl, J.

AU - Gilfedder, B.

AU - Bücker, M.

AU - Frei, S.

AU - Pavlin, L.

AU - Blaschke, P.

AU - Strauss, P.

AU - Blöschl, G.

PY - 2021

Y1 - 2021

N2 - We demonstrate the application of the induced polarization (IP) imaging method to map biogeochemical hot-spots at the catchment scale. Measurements were collected at the Hydrological Open Air Laboratory (HOAL), a 66 ha. research field. Data collected across the entire site reveal relative modest electrical conductivity values (between 60 and 80 mS/m) and low polarization values (quadrature conductivity < 0.5 mS/m) corresponding to the soils with high fractions of fine grains (silt and clay content over 70%).Our results focus on a selected location, where measurements revealed a polarization anomaly (quadrature conductivity > 1 mS/m and conductivity phase above 20 mrads). Mapping IP lines permitted to delineate the geometry of the IP anomaly and select the location for the drilling of boreholes. Analysis of the sediments revealed high carbon and iron concentrations, as expected for a biogeochemically active area; however, negligible concentration of sulfides or magnetite which are the common IP targets. Although the polarization mechanism is open to debate, our results demonstrate the applicability of the IP method as a diagnosis tool to delineate in-situ biogeochemical activity in metal-free media.

AB - We demonstrate the application of the induced polarization (IP) imaging method to map biogeochemical hot-spots at the catchment scale. Measurements were collected at the Hydrological Open Air Laboratory (HOAL), a 66 ha. research field. Data collected across the entire site reveal relative modest electrical conductivity values (between 60 and 80 mS/m) and low polarization values (quadrature conductivity < 0.5 mS/m) corresponding to the soils with high fractions of fine grains (silt and clay content over 70%).Our results focus on a selected location, where measurements revealed a polarization anomaly (quadrature conductivity > 1 mS/m and conductivity phase above 20 mrads). Mapping IP lines permitted to delineate the geometry of the IP anomaly and select the location for the drilling of boreholes. Analysis of the sediments revealed high carbon and iron concentrations, as expected for a biogeochemically active area; however, negligible concentration of sulfides or magnetite which are the common IP targets. Although the polarization mechanism is open to debate, our results demonstrate the applicability of the IP method as a diagnosis tool to delineate in-situ biogeochemical activity in metal-free media.

U2 - 10.3997/2214-4609.202120125

DO - 10.3997/2214-4609.202120125

M3 - Conference paper

SP - 1

EP - 5

BT - NSG2021 1st Conference on Hydrogeophysics

PB - European Association of Geoscientists and Engineers, EAGE

ER -

Mapping biogeochemically active zones at the catchment-scale with induced polarization

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