Drilling Down - Looking With Drill Bit Eyes
October 2023 by Jim Richmond
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.
The favorable geology of the northeastern and central parts of the Seven Troughs Range are the parts most interesting to prospectors. They are underlain by a thick sequence of Tertiary volcanic rocks, mostly rhyolites and andesites.
At first, I tried to shift things around, but then a hand with a rock would appear, so I would stop trying to adjust my gear and grab the rock to keep things moving.
Some ores—mostly those with a high free gold content—are very amenable to gravity concentration. Well oxidized ores containing coarse gold are usually best for non-cyanide processes. Ores with significant sulfide content may require the...
“The evidence is clear—mineral deposits alone are not enough to attract precious commodity investment dollars...”
Let’s examine why your placer gold looks the way it does and what you can tell about its journey based upon its appearance.
Sampling Mission in Placer County's Last Chance Mining District • Discovering Nugget Hollow • Google Earth Pro for Prospectors and Miners • Finding Gold - Fact vs Fiction • A Hole In One