Hard Rock Milling: A Matter of Scale
April 2013 by Chris RalphMost prospectors understand placer mining a lot better than hard rock mining and don’t realize the amount of work that goes into processing different types of hard rock ore.
The nugget sat there in plain sight, though it was covered in dirt, while hundreds of people had passed that way every day.
Every Spanish village seems to hold their pride in one unique area of expertise. Pamplona has its bulls, Barcelona its architecture, and gold panning belongs to Navelgas.
Once across, I panned a couple of spots around some old grass roots and the fine gold was amazingly heavy. Every pan I ran after that had lots of color.
The interesting thing about the Mother Lode area is that we can pretty much find at least a little gold in any creek or river (and even in some of the many dry gulches).
The holes were overloaded with explosives, but I didn’t know it. I was just a green mining engineer fresh out of school and told to watch as the experienced miners set the charge.
The first pieces found were in a spot that most gold hunters would not even detect, right in the middle of a downslope meadow.
When I was recently in West Africa, I got to see and play with my first, phony, Chinese knock-off metal detector.
The Bawl Mill • Ask the Experts - processing plants that can extract rare earth metals • Ask the Experts - what does MDB&M stand for? • Ask the Experts - proper mining claim procedures • The Hughes Creek Placers, Montana • Benefits of a Detecting Partner • Excavator Testing Wet Placer Ground • Paperwork Guy—A Cautionary Tale • ICMJ Online Forum Now Available • Detecting For Gold—Are You Up For It? • A Trip Down the Yukon River • Selenium, Mercury and Suction Dredging—Studies Contradict CA State Water Resources Board • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices