Metal Detecting for Gold, Silver, and Copper Nuggets
by Metal detecting is a challenging endeavor. The ability to tolerate disappointment is a requirement, as is persistence. When hunting for minerals, these facts are magnified. …
Category: Technology
Finding an Arrastre: Ancient Gold Mining Tool
One of the most primitive, and easy to construct, devices for hard rock ore processing is the “arrastre” (or, variously, the “arrastra”). The typical arrastre …
How Deep will my GPR, Metal Detector, or Two-Box Reach?
OK, so we’d all like to know the answer to: “how deep into the earth can my electromagnetic sensor system penetrate?” The short answer takes …