DC Resistivity Survey (Pole-Dipole Array)

Exploration Technique: DC Resistivity Survey (Pole-Dipole Array)

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Exploration Technique Information
Exploration Group:	Geophysical Techniques
Exploration Sub Group:	Electrical Techniques
Parent Exploration Technique:	Electrical Profiling Configurations
Information Provided by Technique
Lithology:	Rock composition, mineral and clay content
Stratigraphic/Structural:	Detection of permeable pathways, fracture zones, faults
Hydrological:	Resistivity influenced by porosity, grain size distribution, permeability, fluid saturation, fluid type and phase state of the pore water
Thermal:	Resistivity influenced by temperature

DC Resistivity Survey (Pole-Dipole Array):

The Pole-Dipole array is a type of electrode configuration for a DC resistivity survey and is defined by its electrode array geometry.

Other definitions:Wikipedia Reegle

Use in Geothermal Exploration

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Field Procedures

The pole-dipole array contains four collinear electrodes. One of the current (source) electrodes is installed at an “effective infinity” distance, which is approximately five to ten times the survey depth. The other current electrode is placed in the vicinity of the two potential (receiver) electrodes. This geometry is utilized because it reduces the distortion of equipotential surfaces. ^[1]