Introduction to Meteorites
February 2015 by Mike LucasThe distribution of meteorites across the planet was, at one time, thought to be random and unpredictable.
Mike and Machael dug in just downriver of that boulder pile and right away found good color and a few small pickers.
After he excavates the ore down to bedrock, he goes over the bedrock with a metal detector to ensure he didn't leave any gold behind before he backfills the area.
"Suh-wheet!" I exclaimed as I sprang to my feet and quickly pumped my detector coil high overhead to alert Smokey that I had just found a nugget.
The whole purpose of sampling mineralized ground is to measure the values in a small volume of material that would be representative of a much larger volume of similar material. The key word is representative. Chemical and fire assaying will not accurately represent placer deposits by themselves.
It is important to note that discrimination is a type of electronic filtering. The signal is analyzed, and depending on the discrimination setting, identified as either a target to be dug or a target to be ignored.
Looking around, I could tell that this was an old hand-digging. As I walked around the perimeter of the digging I could see shovel and pick marks scratched on the clean, hard clay and bedrock.
There are a few questions you will need to ask yourself before you apply for a suction dredge permit from the State Water Resources Control Board.
The Bawl Mill • Ask the Experts • Ask the Experts • Ask the Experts • Mining Community Loses A Great Leader: Gerald "Jerry" Hobbs • Suction Gold Dredge Miners Win On Federal Preemption • Metal Detector Testing Methods • The Silver, Gold and Gemstones of Candelaria, Nevada • Mining for Non-Geologists Field Trip Offered by GSN • Gold in The Silver Crown District, Wyoming • Prospecting for Surface Flood Gold Placers on Low and Intermediate Gradient Streams • Money In, Money Out • Melman on Gold & Silver