Weathering, Erosion and Placers
April 2017 by Chris RalphThe 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.
Potholes in bedrock can trap placer minerals and even be glory holes. They are, at least, interesting geologic phenomena, and at best, a treasure trove of gold nuggets.
I was amazed and surprised, and I took a moment to admire how beautiful this coarse chunk of gold was. It later weighed exactly one-half ounce.
Last month, one of our readers requested an article regarding the possible use of Google Earth for prospecting research. It was a good idea, so here it is.
And we eventually reached gold. It was a winding crevice of beautiful white quartz lined with small nuggets and loaded with fine gold. There were flakes and small granular pieces—there had to be a hundred or more.
Some will doubt its value given the ultra-fine particle size… Some will become encouraged about not having to incur significant time and expense to break rock.
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.
As I started walking down to the river one chilly morning, the mist was hanging over the calm portions of the water like a white cotton blanket. This scene got me to thinking about why the river was like that—the deep pools, boulder fields, gravel bars, the effects of how much water was moving at any given time along the watercourse—and most of all the relationship all these things have on where I will be able to find gold.
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? • The PIGMI—a DIY Crevice Tool • Diary of a Diamond Prospector • The Ups and Downs of Nugget Hunting • Epithermal Gold and Silver Deposits • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices