Subtle and Not So Subtle Dangers of Hard Rock Mining
September 2020 by Ron Kliewer
I’ve been in enough mines to know better, and I mentally kicked myself several times. That was a close call…
Some claim they can smell gold. This may be, but when I take a whiff of gold, I smell dirt, rotten eggs, garlic or just nothing: my nose is everything but sensitive.
For simplicity, I will assume that you wish to make enough profit so that you can comfortably pay your bills using just the profits from the mine.
In some places, semi-continuous sections of riverbed can easily be linked in many places to identify the path of the ancient rivers.
Not long after this, I was camped out with the geologist beside the Similkameen River where he showed me the evidence that an ancient channel existed on our claim.
...your sampling procedures should not be designed to catch gold your mining technique will never recover.
Centrifugal bowls versus jigs
Most placer equipment is really made with gold in the 30 and larger mesh sizes in mind, though if carefully used can often get reasonable recovery down to the 50 mesh size.
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