Gold Deposition and Gradients of Placer Streams—Part I
June 2012 by Jim HalloranWhen placer miners from the gold rush era began experimenting with the slope of their sluices, they must have pondered the ideal slope for trapping gold in a creek bed too. Logic suggests the same is true for streams...
There are many other locations in the area where gold has been found, but Woods Creek is the most famous of the creeks and gulches in the area where the 49ers searched for that elusive yellow metal.
The truth is that cemented gravels are really not all that complex. There is no mystery of how gold grew there or somehow wormed its way into these solid gravels.
While both zinc and lead deposits also are enriched by the surface weathering process, in part two we will look at the enrichment process for copper and also gold deposits, and at the interpretation of leached outcrops to figure how rich the concentrated deposits below them may be.
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.
Prospectors who specialize in electronic detecting for nuggets in desert areas are especially interested in this type of deposit, as it yields nuggets that are close to the surface of the ground...
There are a number of characteristics that are used when one identifies a mineral. Each characteristic gives an indication as to what the mineral might be, and the combination of them will point to what it is.
This mine was a real wonder of engineering, and the water supply and drifts had to be carefully managed to keep it in operation. In fact, it didn’t close due to lack of gold, but instead closed with the fall of the Roman Empire.
The Bawl Mill • Our Readers Say • Iowa Hill District • Pursuing Rare Earths in Wyoming • The Mole • Prospecting for Copper Ores—Part I • Repair / Replace Tax Rule Changes • The Wisdom of Mark Twain—And Tales of Cheating the Unwary Prospector • Colorado Mining Association Appeals Roadless Ruling • Ganes Creek Hits 10 Years—Part II • Fifteen and Counting • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices