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Prospecting With Color
December 2000 by Edgar B. Heylmun, PhD
Perhaps no one factor has caused more confusion in the search for ore than the attempt to use color as a guide to prospecting. Yet, there is a reason for every color seen in rocks, so it deserves to be noted.
The St. Louis Gold District
In 1848 and 1849, miners had pushed all through the western Sierra foothills making many fantastic gold discoveries. The far north end of California’s Mother Lode country, however, had received little exploration.
The Oregon Claim
When I started dredging a short distance downstream from that feature I realized that I was into a major paystreak and much of the gold was coming right out of the upper gravel. I could see the chunky pieces falling out of the gravel as they were pulled into...
Prospecting Knowledge -- Pass It On!
I had two of the guys go down into the creek and each one picked out a small island of bedrock. I had them detect their piece of bedrock and then gave a critique to all on how they did.
The Bawl Mill
• Fried golden eagle is bad; diced is okay
• Your tax dollars at work
Gold Prospecting for Better or Worse: Warning Signs
As we got closer to a wide stream bed, we started hearing some gunfire. It was single shots at first, then semi and automatic weapons fire…
Prospecting Old Tertiary Channels
The potential exists for small-scale placer mining in these pits using a trommel and sluice box or other similar types of equipment.
Glaciers and Placer Gold Deposits
Here we examine where and why placers are found in glaciated landscapes from the Ice Ages.
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The Bawl Mill
• Letter to the Editor
• Potaro District, Guyana
• World Gold Council Launches $3 Million Ad Campaign
• Prospecting for Platinum in Wyoming
• Picks & Pans: More Big River Dredging in Northern California
• Epithermal Ore Deposits Associated With Tertiary Volcanism—And the Feasibility of Metal Detecting for Them
• A Changing Diamond Industry Looks to Canada for Growth
• History of Mining—Bradshaw Mountains, AZ—Part II
• Company Notes
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
