Jump to content

Detecting Bedrock


Recommended Posts


All rocks and soil are is broken down bedrock, and so detectors work as well in bedrock as soil. They may work better or worse depending on the type of rock, and this is generally determined by the magnetic mineral content of the rock. In very rare cases the rock may have conductive content (graphite for example) that can also present difficulties. More common are rocks with so little magnetic content they are quite invisible to the detector. Sedimentary rocks are usually the mildest, with igneous and metamorphic rocks more mineralized. Prospectors by nature frequent more mineralized ground and see more of that type ground than would be normal.

Detectors have been used with success in hardrock mines to "see" into the solid rock and reveal hidden deposits overlooked by previous miners.

  • Like 3
Link to comment
Share on other sites

Quote

Depending on the type of rock... a pulse machine is a better choice.

This is true because in general, VLF machines designed for prospecting are negatively affected by iron mineralization in soils and rock to a much greater degree than PI machines are affected. In very mild soils, VLFs may get depth of detection very similar to PI machines where coil sizes are the same, but in strongly mineralized rocks, the loss of depth can be very significant.

 

  • Like 4
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...