Resurrecting An Old Hard Rock Mine—Gold At Last!
May 2019 by Ron Kliewer
We’ve been busy with a plethora of projects, all aimed at gathering gold into a pile big enough to brag about. We’re not there yet, but I’ll show you some of the interesting projects we’ve completed since we talked last.
Chances are better that both types of gold did not come from the same source. Let's look at the probable conditions to cause two types of gold in a placer.
Because quartz and gold may be deposited together across a considerable range of temperatures, not all quartz veins are the same, and there are several different types of gold-quartz deposits.
This explains the large difference in particle sizes between placers and hydrothermal lode deposits, but also means that while the mining may be similar in some cases, the sampling and recovery techniques are usually quite different.
I pulled out the nuggets I had worked on previously and looked at the size of the wire basket that the items to be cleaned are placed into. It looks much like a miniature french fry deep fryer.
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.
The first step in my recovery process after milling the ore to the desired size is to table it. On this particular ore, I get good results milling it to minus 100 mesh.
Dredges actually do pretty well in freezing conditions. There are a few tips you should know, however.
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts - Who owns this historic mill and how do I handle possible mercury contamination? • Ask The Experts - Sampling and assays • The Geology of Diamond Deposits • Keep Watch for The Unexpected • Imagining the Ultimate Prospecting Adventure • Gold Prospecting for Better or Worse: Cold Gold • Gary It's There • Following the Clues • A Generous Lesson on Detecting Bedrock • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices