Breaking Rock the Old School Way
June 2013 by Chris RalphProspectors have many reasons why they might want to break rocks. These include dividing up a specimen too large to carry.
As we walked back we were just reaching the point of where the faulting should be and there, covered with deep grass, was very faint evidence of an old road going up the mountainside! What was that old road doing there?
Their rewards were far better than they had anticipated, resulting in one of the best clean-ups they had ever seen.
The excavator or backhoe has become the tool of choice for testing placer ground. These machines are the best way to explore and sample a placer deposit if the ground is not too wet or frozen and bedrock is not beyond the reach of the machine.
Breaking cemented gravels
Perhaps the most notable thing about skim placers is that they form on the top surface of gravel bars, as opposed to coarser gold placers where the weight of the gold particles allows the gold to settle down on or near bedrock.
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 Bawl Mill • My Lucky Month of March • Gold Rush in the Congo—Part II • A Journey Into the Silver Peak Range • Ancient River Channels of Trinity County • Which Nugget Detector Should I Get? • Liberty and the Phoenix Mine • Confluence Placers • Spanish Gold Ledge Still Producing Gold • Nevada Mining Tax Cap Repeal Clears Committee • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices