Data related to Low-frequency Polarization of Blank Ice Features in Solid Rocks

General information

The data published here are related to the paper Low-frequency Polarization of Blank Ice Features in Solid Rocks by Moser, C., and Flores Orozco, A. (2025) submitted to Geophysical Research Letters. The data are split up in three folders: "01_spectra.zip", "02_time_lapse.zip", "03_imaging.zip". Details are following below.

01 - Spectra

In the folder "01_spectra.zip" we present spectral induced polarization data collected in the two samples (RA01 and SB01) with an air- and ice-filled hole (state) along three different quadrupoles (Q1, Q2 and Q3). The files are labelled as follows: sample_state_quadrupole.csv. The files contain 6 columns:

1. Frequency(Hz): Measurement frequency in Hz
2. App.Conductivity_real(μS/cm): Apparent conductivity real part in µS/cm
3. App.Conductivity_imaginary(μS/cm): Apparent conductivity imaginary part in µS/cm
4. App.Conductivity_phase(mrad): Apparent conductivity phase in mrad
5. Impedance_magnitude(Ohm): Impedance magnitude in Ohm
6. Impedance_phase(rad): Impedance phase in rad

Additionally, the geometric factors for all quadrupoles are given in the subfolder "geometric_factors". In the paper mentioned above the data are presented in Figure 1. 

02 - Time-lapse

In the folder "02_time_lapse.zip" we present spectral induced polarization time-lapse data collected in the sample SB01 during the formation of ice in the hole drilled in the rock sample. The data were collected along two different quadrupoles (Q1 and Q2). The files are labelled as follows: sample_monitoring_quadrupole_id.csv. The id is associated with the frequency as follows:

1. 1.00 Hz
2. 3.98 Hz
3. 15.85 Hz
4. 63.10 Hz
5. 251.19 Hz

The files contain 6 columns:

1. TimeStamp(s): Time of the measurement relative to time of water injection
2. App.Conductivity_real(μS/cm): Apparent conductivity real part in µS/cm
3. App.Conductivity_imaginary(μS/cm): Apparent conductivity imaginary part in µS/cm
4. App.Conductivity_phase(mrad): Apparent conductivity phase in mrad
5. Impedance_magnitude(Ohm): Impedance magnitude in Ohm
6. Impedance_phase(rad): Impedance phase in rad

Additionally, the geometric factors for all quadrupoles are given in the subfolder "geometric_factors". In the paper mentioned above the data are presented in Figure 2.

03 - Imaging

In the folder "03_imaging.zip" we present spectral induced polarization imaging data collected in the sample SB01 with an ice-filled hole. The data were collected along 138 quadrupoles, are given in the .ohm format and are split up by the frequency. The files are labelled as follows: sample_frequency.ohm. The frequency is given in mHz.

The file is structured as follows:

< Number of electrodes >
#x    y    z
…
< Number of quadrupoles >
#a    b    m    n    r    ip
…

The column names stand for the following parameters:

x, y, z ... Coordinates of the electrodes in m

a, b, m, n ... Electrode numbers used for current injection (a and b) and potential measurements (m and n)

r ... impedance magnitude (Ohm)

ip ... impedance phase (mrad) *-1

Additionally, the mesh, which has been used for the inversion of the data, is given in the subfolder "mesh". In the paper mentioned above the data are presented in Figure 3.