Electric Resistivity Tomography (ERT)
ERT is a method of electric prospecting that gives the possibility to obtain two-dimensional cross-sections and three-dimensional models of the distribution of the specific electric resistivity (R) and induced polarization of rocks. It is aplicable for solving the widest range of geological problems. The method appears to be fundamental in the search and exploration of ore deposits, engineering surveys, geotechnical studies. Multi-electrode and multi-channel electric prospecting stations are used as equipment.
Electric Resistivity Tomography (ERT)
ERT is a method of electric prospecting that gives the possibility to obtain two-dimensional cross-sections and three-dimensional models of the distribution of the specific electric resistivity (R) and induced polarization of rocks. It is aplicable for solving the widest range of geological problems. The method appears to be fundamental in the search and exploration of ore deposits, engineering surveys, geotechnical studies. Multi-electrode and multi-channel electric prospecting stations are used as equipment.
Electric Resistivity Tomography (ERT)
ERT is a method of electric prospecting that gives the possibility to obtain two-dimensional cross-sections and three-dimensional models of the distribution of the specific electric resistivity (R) and induced polarization of rocks. It is aplicable for solving the widest range of geological problems. The method appears to be fundamental in the search and exploration of ore deposits, engineering surveys, geotechnical studies. Multi-electrode and multi-channel electric prospecting stations are used as equipment.
An example of the shallow geoelectric cross-section obtained by ERT
Detailed information
The technology of Electric Resistivity Tomography is based on measurements by means of multi-electrode devices and two-dimensional automatic inversion of the obtained data. When appliying ERT, the same grounding electrodes located on the profile are used in the functions of power supply and measurement. Their quantity can reach several dozens and even hundreds of electrodes. The electrodes are grounded over a fixed spacing (usually 5 m) and connected to a patch cable (wire bundle). This measurement plan leads to a significant increase in the density of observations in comparison with the traditional Vertical Electrical Sounding method. At the same time, the density of measurements corresponds to the degree of detail of multi-spread electric profiling with the lateral spread of 5 m. Special equipment one-by-one communicate to various combinations of electrodes for polling. The measurement result is the information on the distribution of the apparent resistivity by depth along the measurement profile (geoelectric cross-section). The measured profile data are processed together. This approach makes it possible to plot a two-dimensional geoelectric cross-section and take into account the terrain effect
Detailed information
The technology of Electric Resistivity Tomography is based on measurements by means of multi-electrode devices and two-dimensional automatic inversion of the obtained data. When appliying ERT, the same grounding electrodes located on the profile are used in the functions of power supply and measurement. Their quantity can reach several dozens and even hundreds of electrodes. The electrodes are grounded over a fixed spacing (usually 5 m) and connected to a patch cable (wire bundle). This measurement plan leads to a significant increase in the density of observations in comparison with the traditional Vertical Electrical Sounding method. At the same time, the density of measurements corresponds to the degree of detail of multi-spread electric profiling with the lateral spread of 5 m. Special equipment one-by-one communicate to various combinations of electrodes for polling. The measurement result is the information on the distribution of the apparent resistivity by depth along the measurement profile (geoelectric cross-section). The measured profile data are processed together. This approach makes it possible to plot a two-dimensional geoelectric cross-section and take into account the terrain effect
Detailed information
The technology of Electric Resistivity Tomography is based on measurements by means of multi-electrode devices and two-dimensional automatic inversion of the obtained data. When appliying ERT, the same grounding electrodes located on the profile are used in the functions of power supply and measurement. Their quantity can reach several dozens and even hundreds of electrodes. The electrodes are grounded over a fixed spacing (usually 5 m) and connected to a patch cable (wire bundle). This measurement plan leads to a significant increase in the density of observations in comparison with the traditional Vertical Electrical Sounding method. At the same time, the density of measurements corresponds to the degree of detail of multi-spread electric profiling with the lateral spread of 5 m. Special equipment one-by-one communicate to various combinations of electrodes for polling. The measurement result is the information on the distribution of the apparent resistivity by depth along the measurement profile (geoelectric cross-section). The measured profile data are processed together. This approach makes it possible to plot a two-dimensional geoelectric cross-section and take into account the terrain effect
An example of identification of the zone of subsurface karstification at the projected drilling site according to the ERT data. Eastern Siberia. Depth slice at 100 meters.
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