Strange serindipty. I find this site while seeking a recreational gold property and find people asking about my specialty.
I should clarify, I have used GPR systems over the years but have done so exclusively in Arctic oil exploration. I currently am on a barge on the Beaufort Sea on a 3D seismic project.
We use the GPR units to measure the thickness of the ice in order to safely move our equipment around on it. It is very effective for that.
I will paste an example of GPR data below.
The data in the picture is what I see when I have downloaded, mixed it with the GPS positions and picked out the ice points.
On the left there is dry land and no line is visible. As the unit has moved on to ice, the black line shows up. That is the radar refraction on the water. It is acurate within a couple inches. The depth is listed on the right hand side in meters.
To put it simply, the frequency is set to refract on water. Ice is very easy to deal with as there is a very distinct difference in density between water and ice. The frequency will pass through the ice and will reflect on the water.
I then build maps with access in color coding based on ice thickness so that people know which areas may be safely accessed by which units.
The display shown above is very similar to what is seen on the monitor in the field as well.
I have not dropped one to the bottom of the sea yet so I must be somewhat good at it.
I have only used the GPR units in this application. I have recreationally done placer mining over the years and it struck me this year that there could be some valuable data to be aquired with these units regarding placer deposits.
Bench deposits and bedrock depth should be fairly clearly identified and mapped with this unit. Having not used it on land, it will take some experimentation to find the ideal frequency settings and some practice to see what deposits look like. There will not be as much distinction between gravel, clay and bedrock as there is between water and ice so the pictures will not be as clear cut as the one I posted above. I see no reason why these units would not be very accurate with the proper settings and practice though. I look forward to trying them out.
Larry has kindly sold me a property where I can begin my experiments.
Of course I still have to get my backside south of the Arctic circle in order to begin. That will be at the least a few weeks away.
If anybody else has worked with these units in this application and has any tips, I would be more than happy to hear them.