usaflaginmaine Posted September 27, 2016 Share Posted September 27, 2016 Just curious as to whether a gold detector can detect through several inches of bedrock? Link to comment Share on other sites More sharing options...
klunker Posted September 27, 2016 Share Posted September 27, 2016 Yup. But it's a dollars vs. depth ratio. Link to comment Share on other sites More sharing options...
tboykin Posted September 27, 2016 Share Posted September 27, 2016 Depending on the type of rock... a pulse machine is a better choice. You can spend anywhere from 1k to 10k on a pulse machine built for gold... Link to comment Share on other sites More sharing options...
usaflaginmaine Posted September 27, 2016 Author Share Posted September 27, 2016 I own the Makro Gold Racer btw. Link to comment Share on other sites More sharing options...
Steve Herschbach Posted September 27, 2016 Share Posted September 27, 2016 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. 3 Link to comment Share on other sites More sharing options...
Reno Chris Posted September 27, 2016 Share Posted September 27, 2016 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. 4 Link to comment Share on other sites More sharing options...
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