Proper Assaying of Placer Samples
November 2012 by Jim HalloranThe 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.
I had two of the guys go down into the creek and each one picked out a small island of bedrock. I had them detect their piece of bedrock and then gave a critique to all on how they did.
A number of visiting gold miners were quite impressed with our operation and the amount of gold we had recovered in only three hours. No one usually likes digging and slugging buckets all day long, but we actually began to enjoy it after a few good...
A very good baseball hitter might get a hit roughly one time out of every three at-bats, but for prospectors often the results are much sparser and it may take many trips before the prospector hits a home run.
They must have assumed the paystreak was spotty and had been mined out, so they never mined as close to the side of the valley as they should have.
The first requirement is permission from a land owner. This can be tricky and it’s always a bit nerve-racking to approach a stranger cold with such a request.
Some experienced panners with the vigor and longevity to spend a full day panning in the small creeks and ravines can possibly find as much as a gram or more on a good day.
My first clean-up showed that my efforts were not in vain. There was considerable color with some good-sized nuggets in the riffle trap.
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