History & Geology
Greenstone and Gold
September 2013 by Chris Ralph
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.
Prospecting Homonyms
Three homonyms come to mind when I think of gemstones, gold and vegetables: carrot, carat and karat. Let’s look at carrot first.
Confluence Placers
Confluences of placer streams are well known as concentration sites for heavy minerals. The basic reason is that...
Prospecting for Diamonds
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.
Gemstones to Die For
Some gems can potentially poison you, make you sterile and even make you forget who you are.
All the Gold Ever Mined...
If you have been prospecting for any length of time, then you have probably heard something like, “All the gold ever mined would equal a cube 60 feet on each side.”
Refractory Gold Processing
After your excitement peaks when you first receive the high gold assay from the vein you just exposed, you ponder how you will extract and sell your gold. You will need to develop a flow sheet for your process to optimize your recovery and minimize your costs and permit requirements.
Nevada's Silver City Gold District—Part I
The name Silver City is quite ironic as it doesn’t really fit the area’s metal production. The area encompassing the Silver City district is a great, stand-alone gold district, where the production value of gold has been much more than that of silver. Since the initial discovery of gold-bearing veins in the mid-1850s, the area has been a center of continuous small and large-scale gold production.
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The Bawl Mill
• Ask the Experts
• Ask the Experts
• Ask the Experts
• The Long Road to Gold Point, Nevada
• What, Where and How for the New Prospector
• Proper Spacing of Placer Sample Sites
• Hunches, Choices and Guesses
• 12-Year-Old Unearths Large Diamond
• Time for a New Approach: Detecting Float Gold
• Carissa Gold Mine Comes Back to Life
• Gold in Beatty, Nevada
• Cripple Creek Gold Mine Exceeding Expectations
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
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Legislative and Regulatory Update
• Silver Bull Resources Sees Bright Future for Silver & Zinc
• Twenty Minutes on a Five-inch Dredge
