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Induced polarization is a geophysical imaging technique used to identify the electrical chargeability of subsurface materials, such as ore.
The polarization effect was originally discovered by Conrad Schlumberger when measuring the resistivity of rock.
The survey method is similar to electrical resistivity tomography , in that an electric current is transmitted into the subsurface through two electrodes, and voltage is monitored through two other electrodes.
Induced polarization is a geophysical method used extensively in mineral exploration and mine operations. Resistivity and IP methods are often applied on the ground surface using multiple four-electrode sites. In an IP survey, in addition to resistivity measurement, capacitive properties of the subsurface materials are determined as well. As a result, IP surveys provide additional information about the spatial variation in lithology and grain-surface chemistry.
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