Induced polarisation (IP)
Many of the metal sulfide minerals associated with ore bodies and surrounding alteration zones are capable of storing an electrical charge for a short time and releasing that charge slowly, like a battery. This slow discharge generates a small electrical field. Other minerals and rocks allow electrical fields to flow freely, generating additional electric fields in the earth. These signals can be mapped and distinguished using ground-based IP surveys. Areas with flowing currents can be mapped as areas of high conductivity, and areas of minerals that store electrical charges generate IP chargeability anomalies. These methods are particularly effective at identifying and mapping porphyry copper deposits.
HPX has unique strengths in IP surveying and uses proprietary equipment and customised survey designs to ensure it generates the most effective and accurate maps of these sources of electrical fields. HPX specialises in recovering accurate IP data in challenging areas where there is high surface resistivity such as caliche deposits in Chile, or where there is high surface conductivity such as in regolith and lake sediments in Australia.