Drywashing for Fine Gold
October 2017 by Alex Dolbeare
When working fine gold placers with a drywasher, there are some natural variables that can be beneficial as well as others that can be a hindrance to achieving good recovery.
One of the most memorable nuggets I found in Australia was detected on the very last day that I was out prospecting. I was going along swinging my coil and I came across a blaring loud signal that almost blew my ears off.
While the Water Board documented the selenium levels in fish and noted they exceed the levels of mercury, they have yet to acknowledge the numerous scientific studies that show selenium effectively neutralizes the effects of mercury.
Rocks and minerals associated with clay seam gold deposits in southern Oregon are often in sedimentary rock units at least partially metamorphosed into argillite. They are also associated with mafic volcanic rocks, basalts and gabbro that...
We are both very experienced working this type of ground, and we quickly found the pay layer where we would focus our efforts. The bedrock has good gold, but so does the red hard pan.
We dug and extracted for two more hours. This time, as I dumped the concentrates, I saw a piece of gold three-fourths of an inch long and as big around as a pencil.
I had some success following this premise this summer, finding a few nuggets in places I think I overlooked in the past.
Gold nuggets come in all forms, but I never expected that dinosaur nuggets would too, and at a decent price.
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts - Where should I get my geology degree? • Ask The Experts - How much rock shall I crush to determine the value? • Placers Directly Associated with Lode Deposits • Is It Time for a Change? New Ways to Find More Gold • MMAC Update • Silverton's Gold • Procuring Mine Owner Permission at a Mine Site • Champions Crowned at the California State Gold Panning Championships • ICMJ Gold Prospecting and Mining Summit Postponed • Kennecott Copper Mine, Kennecott, Alaska • High Prices for Gold, Silver & Copper: What Does it Mean for Prospectors? • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices