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 believe dry washing is an underappreciated prospecting method. There are plenty of places where there is some pretty decent gold to be had, but the spot is a long way from any water and dry processing may well be the best way to go.
A week later, a small team of us hit it again, and this time the gold really showed up.
Four nuggets, ranging from one to four pennyweight, had been found originally. All four nuggets were found in a line about ten feet apart from each other.
The same questions you ask yourself about gold trapping features in the present stream can be applied to the benches above the stream. Just imagine the stream at a much earlier time, before it cut its way down to the present level…
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.
Gold is a fairly widespread mineral in the Italian Alps and in the Northern Apennines. It is found both in primary mineralization and in past and recent floods.
When you think about the extremes to which a miner will go to get a little gold, it occurred to me beach gold could be "easy pickings."
The Bawl Mill • Ask the Experts • Ask the Experts • Ask the Experts • Ask the Experts • The Portable XRF Gun • Gold Dredging on Oregon's South Umpqua • The Struggle to Reopen Alaska's Largest Gold Mine • Prospecting With a Detector: Lessons Learned • The Rush to Treasure Hill • Tips on Crevicing for Gold • Using Google Earth and Other Maps • Mining, Health Care & Taxes • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices