Glaciers and Placer Gold Deposits
November 2016 by Chris RalphIt also happens sometimes that glaciers will bury valuable placer deposits. This occurs when the glacier goes over the top of an existing placer deposit.
In the summer of 1854, John Selkirk, a discouraged placer miner who was down on his luck and ready to go back to Massachusetts, tied his mule up in a gulch north of what is now downtown Angel's Camp.
The largest and most perfect single gold crystals are nearly always in the form of octahedra. These large octahedral crystals often possess deeply recessed faces.
The big interest to prospectors thinking about the effect of erosion is not what might happen long into the future, but what they might find in the rivers later this summer when the water levels go down.
The biggest obstacle is that like many streams on the Kenai Peninsula, high water during the summer months from snow melt and rain can make dredging nearly impossible. The best dredging is in the colder months of the year.
The areas that were mineralized with the bedded ore were huge and vast tonnages were indicated, although they had no idea at the time.
Because tungsten minerals are heavy, exploration can be done using stream sediment samples. Prospectors looking for gold have found scheelite or wolframite in their placer concentrates, and in some cases this has led them to make important tungsten finds.
...these nuggets have not traveled far from the lode because the golden wire lattices would have been torn apart or flattened during weathering of rock and deposition by violent stream action.
The Bawl Mill • Our Readers Say • Legislative and Regulatory Update • Detecting: Small Creek Yields Good Gold • Ask The Experts: Is this BLM demand legitimate? • The Challenge of Winter Dredging • What Have You Got to Lose? • MMAC Update • How to Upgrade Your Pocket Plunger • What's In A Name? • Oregon Miners Still Fighting • Greenhorn Finds Gold in Colorado • Mining Stock Quotes and Mineral & Metal Prices • Melman on Gold & Silver