I've heard and read that ground mineralization varies a lot from place to place. Ever since I got my detector, I've wondered just how mineralized the soil is here in Hawaii, and thus if I'm losing significant depth due to ground mineralization. Then I remembered that the ground here isn't very old as compared to other parts of the U.S., as the islands here were created by still-active volcanoes. As a result, the only rocks and soil we have here naturally are igneous and have come directly from the volcano (not acted upon by the elements, like soil in mineralized areas). Does this mean that soil here should contain little or no mineralization? I'm just curious and looking for some feedback on this theory.