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History & Geology

Colorado Uranium Mining in the 1950s Boom

You can learn a lot from a small mining operation because you have to become proficient in every job. Soon I was preparing fuses, placing powder (dynamite) and learning the ins and outs of drilling and blasting.

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Why Did This Silver Mine Close? - Pt III


Narrowing down a closure date will allow you to check the commodity price during that time and possibly confirm that a low price, rather than a lack of ore, was the driving force that closed the operation.

"Gold Rush: Alaska" in the Porcupine Mining District


Honestly, I don’t believe it is likely there would be a glory hole where they described one at the bottom of the waterfall because plunging water with enough energy to scour out a large hole in bedrock would have the scouring ability to grind up and...

Northwestern Alaska Mineral Resources


Gold and jade are actually only minor mineral resources for the Northwestern Alaska region as a whole. Modern prospecting has focused more on base metal than precious metal resources.

Sierra County Gold—Part I


...this county contained some of the richest placer ground found in all of California and still produces some pretty impressive finds to this day.

Rare Silver Nuggets And Their Origins


Silver nuggets have been described as “ultra-rare,” “prized” and “unique.” Naturally occurring silver nuggets are rare enough to suggest caution when purchasing. Fakes have reportedly been produced and misrepresented for sale as genuine specimens.

Prospecting for Surface Flood Gold Placers on Low and Intermediate Gradient Streams


Sample panning is a very important method used to find the richest parts of a flood gold deposit before setting up equipment and running material.

Mohave County, Arizona: The Oatman/San Francisco Mining District


The Oatman/San Francisco Mining District’s historic gold production of 2.2 million ounces of gold since the 1880s makes this area Arizona’s greatest primary gold producing district.

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The Bawl Mill   • Ask The Experts - Info on Santa Cruz beach placers?   • Ask The Experts - Detectors and flour gold   • Ask The Experts - Why is the gold in these clays?   • Ask The Experts - Can you explain colloidal gold?   • Ask The Experts - Where did this kimberlite come from?   • Ask The Experts - Can gold particles combine to form a nugget?   • Placer Gold Deposits in the Western States   • Evaluating Gold Recovery with Mass Balance Calculations   • Clues for Detecting Ancient River Channels and Flats   • What Is Your Grade?   • State of Idaho Looks to Invest in Gold and Silver   • Drywashing for Desert Gold—Part II   • Decoding Dredge Capacity   • I Just Tripped Over A Nugget   • Melman on Gold & Silver   • Mining Stock Quotes and Mineral & Metal Prices

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