Prospecting & Detecting
Dredging Tips and Tricks: A Measure of Water Pump Efficiency
August 2020 by Harry Griffin
…as an academic argument, when mated to the appropriate engine, is the pump really moving water at the rate of 400 GPM?
The Potholes—California’s Oldest Known Mining District
Every time we prospected here we found gold, sometimes some really coarse flakes, but no large nuggets (yet).
Wild and Scenic River Prospecting—North Fork of the American River

A Generous Lesson on Detecting Bedrock
The signal I was hearing was coming from a vertical bedrock crack on the bank of the creek. I removed my backpack, took out my crevicing tools and started to clean out the crack when I saw a glint of gold.
Gold in Unlikely Places

Hard Rock 101: Advanced Micro Blasting
They… create negligible fumes and much less fly rock than blasting. Below are some tips on maximizing your effectiveness with these tools.
Shallow Water Crevicing Can Bring Big Rewards
Shallow water crevicing or sniping can produce gold if you’re persistent, a hard worker and lucky. It’s nice to have a snorkel, wet suit and goggles. The best practice for success, in my humble opinion, has always been to determine the best gold location and then figure out how to capture it.
WWII Vet & Prospector Still Going Strong
Lately I’ve been having success utilizing two types of detectors in succession. The first is a pulse induction (PI) detector with a blanket-style antennae, and I follow it up with a very low frequency (VLF) detector.
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• Hard Work Pays Off On Hard Rock
• The Mysterious Telluride Minerals
• Detecting: Getting Away From The Heat And Into The Gold
• The Coolgardie Gold Mining Camp of Southern California
• Gold Prospecting for Better or Worse: How Curiosity Burst My Platinum Bubble
• Prospecting for Copper—What to Look for on the Outcrop
• Hard Rock 101: Small-Scale Blasting
• Melman on Gold & Silver
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