Understanding Rock Formations: Petrology for Prospectors
February 2021 by Chris Ralph
There are times when being able to recognize a type of rock can make you a much more successful prospector.
My friend came walking in from the garage with what looked to me like a stick of dynamite. Chuckling, he said, “Have you ever been gold mining?”
In my head I was thinking, “Not at 3 am in the morning with dynamite.”
It was one of those awkward situations as we walked, fatigued and too thirsty to speak a word.
Steve got his first nugget within minutes of turning on his metal detector. It only took me about an hour to find my first piece.
Sampling gold placers can be rewarding, but remember to treat the samples so you are not high grading or low grading your results. Learn the rules and apply them so your samples are accurate.
As the ground thaws and dries out and the warmth of spring starts to settle in, it’s time to start afresh with a new prospecting season.
In underground placer work, the contact point of the bedrock tunnel and the gravel is a very weak point and always has to be timbered. The bedrock here is thin, fractured, and the gravels loose from many years of oxidizing.
Doug told me that there had been a 100-year flood that took place in October of 2013 and it washed out part of the mile-long landing strip. It also washed a large, wide gully down below and above the camp.
The Bawl Mill • Ask The Experts - Where did the gold go? • Ask The Experts - True north or magnetic north? • Ask The Experts - How do I avoid claim jumping? • Ask The Experts - Are closed placer and lode claims worth my time? • Gold Geochemistry: Where Does Gold Come From? • Goal Setting and Rock Tossing • Principles of Designing Your Mill Production System, Part II: Mill Design • Gold Prospecting for Better or Worse: A Claim to Die For • Tips and Tricks: How to Make Your Own Gold Bars Without Burning the Place Down • Minnesota Lawmakers Move to Stop New Mines • Drywashing for Desert Gold—Part I • Seven Troy Ounces of Premonition? • I Was Looking for Gold But I Found Jade • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices