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Clearview Geophysics

Precision Gravity Surveys

January 4, 2019

Gravity Surveys are used for many applications, including gold, base metal and diamond exploration.  For geotechnical applications it can be used to detect buried bedrock escarpments, for example.  

ClearView’s Trimble R12i GPS and Scintrex CG6 are industry state-of-the-art for taking measurements with sub-centimetre vertical accuracy and high repeatability.

Notice in the following image, an extension bar was added to an older R10 RTK GPS staff to allow better access in dense bushes. This is typically not necessary with the newer Trimble R12i.  The R12i inertial feature allows for fast highly accurate readings without needing to level the sensor.

The following image is of the CG6 setup on the base station.  The Trimble R12i rover GPS is sitting on the skidoo, and the R12i base station GPS is running on the tripod in the background.

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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/SK), 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.

Precision Gravity Surveys

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Gravity Surveys are used for many applications, including gold, base metal and diamond exploration.  For geotechnical applications it can be used to detect buried bedrock escarpments, for example.  

b2ap3_thumbnail_20181208_112207.jpg

ClearView’s Trimble R12i GPS and Scintrex CG6 are industry state-of-the-art for taking measurements with sub-centimetre vertical accuracy and high repeatability.

Notice in the following image, an extension bar was added to an older R10 RTK GPS staff to allow better access in dense bushes. This is typically not necessary with the newer Trimble R12i.  The R12i inertial feature allows for fast highly accurate readings without needing to level the sensor.

b2ap3_thumbnail_20191006_135740.jpg
b2ap3_thumbnail_20191003_134037.jpg

The following image is of the CG6 setup on the base station.  The Trimble R12i rover GPS is sitting on the skidoo, and the R12i base station GPS is running on the tripod in the background.

b2ap3_thumbnail_20210321_090909.jpg

The 35W repeater is positioned on high ground allowing property-wide measurements even in rough terrain.  This allows for a single base station position and reduces the chance of error when needing to ‘leap-frog’ the base station across the survey area.

The TSC7 datalogger runs Windows 10 and works in harsh weather environments.  Bluetooth is used to communicate with the R12 receivers.

Bouguer Gravity is calculated using Earth Tide corrections, Free Air Corrections, Bouguer corrections and Latitude corrections.  These corrected data can then be inversion modeled using UBC inversion facility software, for example.  Depending on the project, results can be compared to magnetics and other data to help with the interpretation of results.