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.

Snowmobile-Mode Surveys

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Snowmobile-mode surveys can be used with different geophysical techniques.  Our flagship survey is the cesium-magnetometer survey - almost continually applied and operated in the arctic on small and large-scale projects at spring-time personally by Mr. Mihelcic since 1996.  Only the mag sensor and GPS dome are on the sleigh separated by 1.7 metres.  Post processing corrections using in-house software correct for this layback and a 0.33-second system latency which is confirmed by speed tests done over anomalies in both directions.  The tried and true un-manned aluminum sleigh is located far back from the snowmobile.  It has proven durable in boulder fields, steep terrain, extreme cold and wet conditions.

These design features, fine-tuned over 20 years, give extremely low heading errors - far better quality than walking mode and certainly higher resolution than any airborne survey.  Productions rates of 40-80 km per day can be acquired depending on terrain, with readings at 10x per second.

This spring we applied a combined cesium-mag and TDEM system on a large-scale project in Nunavut.

The image below shows the magnetometer sleigh followed by the TDEM sleigh on the horizon:

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In the example below, Noggin 250 and Noggin 100 systems were used to rapidly collect high resolution GPR data over a large area in Northern Ontario.  The 250 MHz antennas are shielded and therefore there is no interference from the snowmachine. The 100 MHz antennas are un-shielded and reflections from the snowmobile are accounted for.  Depending on the subsurface target, it is sometimes necessary to vary the distance between the sleigh carrying the GPR system and the snowmachine to ensure that the target reflections are not overly interfered with.  This could mean bringing the sleigh and GPR system closer to the snowmachine for deeper investigations.  For shallow investigations, the sleigh is typically moved further from the snowmobile.

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The following image is from a recent field-test of the combined mag-TDEM system successfully applied in the arctic.  Note the non-magnetic magnetometer sleigh in the middle and the non-conducting TDEM sleigh at the back (right). The next version in development will have the mag and TDEM system mounted in closer proximity to each other with a larger transmitter coil allowing for deeper penetration and easier transport over rugged and uneven terrain.

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