Epithermal Gold and Silver Deposits
April 2017 by Chris RalphEpithermal deposits form in the ground at shallow depths. They are popular with prospectors because can yield very rich deposits and they are widespread in the Western US.
Let’s take a look at diamonds and diamond mining and see how they form, how they are used beyond just jewelry, and what leads geologists to find diamond deposits.
Only the famous Kennecott copper mine was able to continue operating through the Depression owing to the exceptional richness of its ore.
The nugget sat there in plain sight, though it was covered in dirt, while hundreds of people had passed that way every day.
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.
One of the first minerals most prospectors learn to recognize is quartz, because, in the right circumstances, it can be an excellent indicator mineral for prospectors. Quartz is common, easy to identify, and is often associated with gold and other valuable metal deposits.
Contacts, faults and zones of weak rock are all places that can act as a pipeline to convey gold-bearing fluids, leading to valuable deposits.
...two jadeite locations in California have been thoroughly researched by geologists. There are no doubt others that lie in wait.
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts: Is an XRF gun useful for prospecting and mineral identification? • Ask The Experts: Is this deposit worth working? • Ask The Experts: Can a long range locator probe detect gold in quartz? • Weathering, Erosion and Placers • The PIGMI—a DIY Crevice Tool • Diary of a Diamond Prospector • The Ups and Downs of Nugget Hunting • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices