Methods

Within the specialty of geophysics, there are a number of geophysical methods that can be applied to obtain solutions for your project.  In some cases, it is beneficial to apply more than one method for complementary information.

A few examples of situations where complementary methods are recommended and carried out by ClearView:

Environmental Investigations:

Where buried metal is the main target, ClearView typically has on-hand an EM61 metal detector, a Noggin250/500 GPR system, AND a Radiodetection RD8100 PDLG+ with 10W Tx Pipe & Cable Locator system.  For larger areas (>1 hectare), an EM31 is also made available.  The EM61 and/or EM31 survey is carried out and viewed on the field computer.  GPR and Radiodetection instruments are then used to follow-up questionable EM anomalies to provide additional interpretive information about their potential sources.  GPR is also necessary in areas with excessive surface metal interference, or where concrete containing rebar "masks" objects that could be located underneath.  The Radiodetection instrument can be used to test vent and fill pipes, if available.

Depth to Bedrock and Water Exploration:

Bedrock interfaces and overlying soils can make it difficult to measure depth's to bedrock with a single geophysical method.  That is why methods are sometimes combined depending on site conditions.  For wide open areas with predominantly sandy soils, seismic refraction and GPR are good methods to apply.  For more confined areas and mixed soils, an EM31 and TDEM sounding survey is useful to map the lateral variations in soils and detection of faults and alteration zones within the bedrock respectively.  Micro-Gravity is another method that ClearView has successfully applied to locate escarpments and lateral variations in bedrock topography.  Gravity works best over flat terrain and vibration-quiet areas, although it was completed successfully in a city environment when done at night when traffic was minimal.

Base metal exploration:

Magnetics and gravity data can help guide both broad and detailed TDEM surface and borehole surveys carried out by ClearView.  In large scale arctic settings ClearView develops UBC Mag3D inversion models of ClearView's high resolution snowmobile-mode cesium magnetics data.  These models along with the help of MultiLoop III, are used to design follow-up TDEM surveys.  ClearView can carry out all aspects of your Base metal exploration geophysics program: from design to implementation, modeling to presentation, interpretation to reporting...and continuing follow-up. 

Diamond exploration:

Ground magnetometer, electromagnetic, resistivity, GPR and gravity surveys (e.g., Snowmobile-Mode Cesium Mag / MaxMin / EM34 / Syscal / Ohm-Mapper / PulseEkko/Noggin / CG5 etc.) can be utilized to prioritize the large number of airborne magnetic and EM anomalies that are deemed favourable kimberlite targets.  Electromagnetic, resistivity, or GPR anomalies that correlate with magnetic anomalies are higher priority for drill testing compared to anomalies with no correlation. 

Gold exploration:

A magnetometer AND Spectral IP & Resistivity survey carried out by ClearView is typically recommended.  An anomaly with short spectral Tau, high spectral MIP, low resistivity and a magnetic low could result from fine grained sulphides within an alteration zone.  In some environments, this could represent ideal conditions for gold.  In environments where sulphides are more scattered throughout the various gold bearing and non-gold bearing rock types, borehole IP data can more directly correlate detection log results to assays, structure and % sulphides to develop a signature that can be applied on a broader scale.  ClearView compiles the geological and geophysics data to get the most information possible. 

ClearView can recommend the best geophysical solution for your project based on years of field tested experience.  Note that as more data are acquired from follow-up surveys, ClearView routinely compiles data from previous surveys and reinterprets the results with the newly incorporated data.