Detecting Alluvial Bench Deposits -- Pt II
March 2017 by Reese TownesWalking around the gulch and exploring the upper drainage, picking up different rocks and inspecting them with a good loop, and looking them up in a field guide of rocks and minerals of your region will help you understand how the gold got there.
Gold trapped in the cracks can be encrusted close to the walls or mixed with sand and pebbles, making the gold difficult to see and then extract. Crevicing requires a lot of patience to achieve positive results.
Some of the items that I’m going to go over are outcroppings, ditches, exploratory trenches and contacts/surface materials. I am going to speak about each of the above items in as much detail as I can, and then towards the end of this article I will tie them together.
Old mine workings and tailing piles can represent opportunities on many levels, from the chance to simply find a nugget on up to the commercial reworking of the old tailings for profit.
Several areas came to mind, but each was eliminated for one reason or another. One that seemed to be hanging on was the old historic mining town called Placerville.
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.
I knew the nuggets got into the nugget patch somehow, I just had to figure out how and from what direction they came.
I looked over and saw Ben on his knees, digging at the edge of the Manzanitas, almost underneath them. I thought back to the previous weekend when we were planning this trip—that day had been a “Ben day.”
The Bawl Mill • Ask The Experts: Can you review the differences in dry washers? • Ask The Experts: Will this detector work for me? • Ask The Experts: Nickel assays • Ask The Experts: Potential for developing magnesite deposit • Our Readers Say • Selectable Frequency vs Multi Frequency Detectors • All About Chalcopyrite • The Goldfield Mining District -- Then and Now • Nevada's Lithium Boom • Old Patch, New Detector • Over The Divide: James H Harrand & Daniel Yesberger • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices