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hematite within the mineralizing system a magnetic low is often produced. The combination of gravity
high and magnetic low anomalies is good evidence for a hidden copper-rich IOCG deposit.
Exploration for Volcanic massive sulphide (VMS) and Mississippi Valley-type deposits and can also
make use of gravity surveys due to the contrast between the host rock and the deposit-related sulfides.
Home / Knowledge Base / Mineral Exploration / Exploration Geophysics / Resistivity and Induced
Polarization Surveys

The layout of electrodes and instrumentation for an IP survey.

Resistivity and Induced Polarization Surveys

Resistivity Method – The Basics
Without going into the physics of Ohm’s law, if you run a current through different materials you can
calculate the electrical resistance by measuring the voltage and current applied. In practice this means
that a resistivity survey will form an electrical circuit through the ground and take voltage and current
measurements to calculate the resistivity of the sub-surface rocks.

For mineral exploration, resistivity surveys offer another indirect method to assist mapping and
understanding the sub-surface geology, before we spend serious money on a drilling programme.
Alternative Geophysical Surveys:

• Telluric Currents
• Gravity
• Ground Magnetics

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