Spectral IP and Resistivity

Spectral Induced Polarization & Resistivity surveys (IP & Res) are excellent methods for detecting disseminated sulphide mineralization that could be associated with gold. The surveys are carried out using surface and borehole modes.

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Large Loop TDEM

ClearView Geophysics Inc. owns and operates transient PROTEM receivers and TEM57/67 transmitters built by Geonics. This system has proven itself useful for detecting both good and bad conductor sulphide mineralization located both shallow and 100’s of metres deep.  It is also useful for detecting sources of water.

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Snowmobile-Mode Cesium Magnetics and more...

Cesium magnetometer and other geophysical surveys are carried out using custom-built sleighs, carts or rafts pulled behind standard snowmobiles, ATVs and boats.  The snowmobile-mode cesium magnetics system has proven itself on numerous large-scale mineral exploration projects during the past 25+ years. 

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Seismic Refraction

Seismic Refraction surveys are typically carried out for depth to bedrock investigations.  The "shot" can be either an explosive or hammer source.  Interpex IXRefraX software is used to process the data.

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Electromagnetic (EM) and Magnetic surveys

EM and Magnetic surveys are perhaps the most common geophysical methods used on mineral exploration and environmental investigations. The most commonly used EM instruments for environmental investigations are the Geonics EM31 and EM61.

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GPR ( Ground Penetrating Radar )

GPR works best in low conductivity areas. Conductive materials (e.g., clay) attenuate the GPR signal to the point that very little depth penetration is achieved. Penetration is greatest in unsaturated sands and fine gravels.

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Gravity

Gravity surveys are completed for a number or applications, including mineral exploration (e.g., diamonds) and geotechnical investigations (e.g., escarpments).

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Geophysical Interpretation

ClearView has extensive experience interpreting airborne and ground-based geophysical data. We use UBC's suite of inversion software to produce 2D and 3D interpretations of total field magnetics and IP/Resistivity data. Post-processing software is also used to produce various derivative datasets and maps.  

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Welcome to ClearView Geophysics

ClearView Geophysics Inc. is a geophysical services company founded in 1996.  There is no better way to collect high resolution sub-surface data than with ground-based sensors or 'boots on the ground'. When you describe your project goals to us, we will design a geophysical survey to help you achieve those goals in the most cost-effective manner possible. Getting high resolution ground-based geophysical data is arduous but worth it - so we are constantly working to find ways to make it easier, such as with our snowmobile/ATV/boat-mode surveys.

Joe Mihelcic, B.Sc.(Hon), P.Eng.(ON/NB/NL), P.Geo. (NU/NT/NS/NL), M.B.A.; other jurisdictions licensed and authorized as required.
Geophysicist, President & Owner

About the Owner: Mr. Mihelcic is an Applied Science '88 Geological Engineering (Geophysics Option) graduate of Queen's University at Kingston and '95 MBA graduate of Ivey Business School at the University of Western Ontario in London. He enjoys designing and implementing off-the-shelf components and technologies to make ground geophysical surveys easier and therefore more cost effective. He also writes C++ software to streamline processing and interpretation.

Cross-hole IP/Resistivity Surveys for Gold & Voids

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Cross-hole IP/Resistivity Surveys are carried out with C1-C2 transmitter current electrodes at 'infinity' perpendicular to the target strike and on each side of the target.  P1-P2  electrodes are placed in the borehole pairs and read in a semi-tomographic mode.  A third electrode is typically positioned at one of the collars for quality control and to monitor the transmitter current as the surveys progresses.

Results are UBC3D inversion modeled using borehole survey data supplied by the client.  ClearView's in-house software is used to georeference the IP and resistivity data to the UBC3D input format so that results can be updated each day to optimize the next borehole pair to be surveyed.

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Cross-hole Resistivity surveys can also be carried out for medium-scale geotechnical projects where voids are of interest.  In the following image, a cross-hole resistivity survey was carried out with transmitter electrodes upstream and downstream along a canal and borehole pairs were logged from land boreholes to barge-drilled boreholes. The resulting 3d inversions indicated areas under the canal where potential voids were located.

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In the following images, a very small-scale cross-hole resistivity survey was carried out on a major Metrolinx project in GTA (Toronto).  Transmitter electrodes were located a few hundred metres on each side of the tightly spaced boreholes to check for potential voids next to piles.

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The transmitter setup usually includes a complete on-site backup to ensure there is no down-time.

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The wire used is new and after a few cross-hole projects, the borehole wire is transferred for surface work and new wire is used for borehole surveys to ensure there are no electrical leaks.

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