Borehole geophysics provides a means of evaluating various properties of subsurface rocks, soils and fluids. Probes measuring various, specific properties are lowered into boreholes collecting either continuous or point data. During logging, data is both presented graphically in real-time, and recorded digitally for subsequent review and analysis.

Providing critical information not available through other means of investigation, the use of borehole probes is common for many applications including groundwater and natural resource exploration, and environmental characterization.

EM39: measuring the conductivity of rocks, soils and pore fluids, the EM39 provides an effective radius of exploration of 1.5 m from the center of the borehole. Measurement is unaffected by the presence of plastic casing or conductive borehole fluid.

Gamma39: measuring the emission of natural gamma radiation from subsurface materials, the Gamma39 provides information on relative clay content, assisting with the interpretation of EM39 conductivity data.

EM39S: measuring the magnetic susceptibility response from subsurface materials, the EM39S provides an effective radius of exploration of 1.5 m into the formation. Measurements are not affected by variations in remnant magnetization or the strength of the earth’s magnetic field.

BH43-3: providing three-dimensional measurement of transient decay from the borehole, the BH43-3 can be operated, in association with a PROTEM system at surface, to a maximum depth of 2 kilometres.

Data collection and processing associated with all probes, except the BH43-3, is supported by Geonics DAT software. BH43-3 data is recorded directly by the PROTEM Receiver; data processing is available with Geonics GSPX7 software.