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

Cesium magnetometer surveys are carried out using a custom-built sleigh pulled behind a standard snowmobile.  This system has proven itself on numerous large-scale mineral exploration projects during the past 15+ 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 ground-based geophysical data is arduous - so we are constantly working to find ways to make it easier, whether its with our snowmobile- and ATV-mode surveys or with exo-skeleton systems for more supportive and safer fieldwork.

Joe Mihelcic, P.Eng., M.B.A.
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 his own software to streamline processing and interpretation.

4-Pin Wenner Array...Plus...

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ClearView completed several 4-Pin Wenner Array surveys as per ANSI/IEEE Std. 81-1983 and others as a guide (i.e., IEEE 80-2000 and ASTM G57 for soil resistivity test).  The work was carried out so that appropriate electrical grounding design for planned facilities within highly congested industrial areas in downtown Toronto could be done.

A Phoenix 3 kW transmitter with Scintrex IPR12 were used as the transmitter and receiver respectively.  The transmitter, which is powered by a Honda motor-generator, provided switch-selectable transmitter voltages that provided sufficiently high Vp's at the receiver where required (e.g., for the larger "a"-spacings and more conductive settings).  New custom designed and manufactured stainless steel grade 316 electrodes measuring 12 inches long were used to keep burial depths consistent at all accurately measured and positioned injection and receiver points.

Typical instruments used for 4-Pin Wenner Array surveys for grounding design are battery operated.  The 3 kW MG operated transmitter used for this project was able to produce higher sustainable transmitter currents and higher Vp's where required for the larger "a"-spacings and in more conductive areas.  Therefore, results are 'cleaner' compared to battery-operated systems because the measured amplitudes are larger for the MG operated Tx.  That is, minor fluctuations in measured transmitter currents and receiver voltages caused by factors such as electrode contact, near surface moisture, etc. are less significant for large values possible with the MG powered transmitter compared to smaller amplitude measurements that would be expected from a battery operated system.

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Several additional geophysical surveys were also carried out to characterize the sub-surface in the area: GPR at 250MHz and 100MHz, Geonics EM31 Ground Conductivity (vertical dipoles mode), and Geonics EM61 metal detection (standard coils).  Private locates with the Metrotech Pipe & Cable Locator were also completed.  The results from these additional surveys were important because buried facilities could interfere with and skew the 4-Pin Wenner Array results if located along or relatively near the spread.

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