IP-1 Borehole IP/Resistivity

Caracle Creek and Triumph Systems have partnered to offer state-of-the-art borehole IP/Resistivity survey technology to the industry.

Benefits of Triumph IP-1:

  • Provides a measure of formation resistivity (in ohm-m) and IP chargeability (in mV/V).
  • It is the method of choice in the search for disseminated sulphide, which can be associated with gold.
  • The probe provides a bulk measurement up to 2 m beyond the drill hole, providing a better sample volume than just the core itself.
  • The measurement is continuous with readings provided every 6 cm for high resolution geologic mapping

The Triumph IP-1 system and team provides:

  • Borehole winch from 300 m portable version to 3 km truck-mounted units.
  • Interface which generates the IP and resistivity signal (500 W).
  • Borehole probe which is rated to 5,000 psi.
Triumph IP-2 Borehole Probe

The IP-1 resistivity and induced polarization (IP) array measures formation resistivity over 16” (short normal), and 64” (long normal) acquired during the on-time current as well as IP chargeability response acquired during the off-time current.

The IP response is measured as chargeability in mV/V with one channel after the positive current and one channel after the negative current.

The resistivity array measures formation resistivity calibrated in ohm-m, one measurement during the positive current and a second measurement during the negative current. All data is digitized within the probe and transferred to a surface console in binary format. Power for the resistivity and IP measurements is provided by the surface console.

Technical Notes [Triumph IP-1]:

In areas containing low resistivity intervals, such as high sulphide environments with abundant pyrite and/or pyrrhotite, clay-rich and/or graphite-rich zones, an induction conductivity coil (IC-1) is recommended to extend the range to as low as 0.1 ohm-m. Such coils provide detailed information within the more conductive zones such as identifying net-textured from semi-massive and massive sulphide.

Where only predominantly high resistivity intervals are of interest (e.g. quartz-hosted gold deposits), magnetic susceptibility (e.g., MS-1) and natural gamma (e.g., NG-1) sensors can be incorporated into the resistivity probe to help better correlate geology.

In addition to resistivity, induced polarization can be measured by supplying an alternating bipolar square wave current to the probe in place of a constant current. During the transmitter on-time the probe response approaches the DC resistivity of the formation. After the current is switched off the IP response is measured. This is repeated during the reverse (negative) current and results in two measurements each for resistivity and IP.