Gold Depositiion and Gradients of Placer Streams—Part II
July 2012 by Jim HalloranThe steeper the gradient is, the more potential erosive power to move gold and other bedload sediments, and the more power to remove obstacles to flow.
In 1967, a local resident showed me a pouch of small gold nuggets and flakes. Several years later I asked the same person where that gold was found. He responded, “From the streambed below the old stamp mill at Apex.”
The placer mineral identification key is designed to answer this question. It attempts to recognize all the minerals in your gold pan concentrates.
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.
Honestly, I don’t believe it is likely there would be a glory hole where they described one at the bottom of the waterfall because plunging water with enough energy to scour out a large hole in bedrock would have the scouring ability to grind up and...
…some miners are doing exceptionally well… with a few obtaining amounts estimated in the millions of dollars.
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.
There are a large number of different kinds of gangue minerals, and each of them has its own tale to contribute to the story of the chemistry and geology of a deposit.
The Bawl Mill • The Life of an Independent Prospector • Gold in Guyana—Part I: Porknocking on the Puruni River Road • That Something Extra • Prospecting for Copper Ores—Part II • Metallic Trash—Scourge of the Prospector • Gold Mining Boom in the Carolinas • California Suction Dredging Update • Mine, Baby, Mine! • Hecla to Reopen Lucky Friday Mine • Nova Scotia Shows It's Serious About Jobs & Mining • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices