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Ask The Experts: Equipment to break up heavy clay

Q: I am looking for a “trommel machine” that doesn’t separate anything but clay slurry from rock hard clay.

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Explosives and Mining


Explosives used correctly will save you both time and money being one of the best and most productive tools you can use.

The PIGMI—a DIY Crevice Tool


I’ve had great success using it to gather gold from crevices. I’d like to share the design with all of you gold miners reading this article and hope that you get as much satisfaction building and using it as I did.

Attention to Detail - Part II


Ditches almost always started in the high country and contoured the mountainsides, making a long drop, usually many miles away, to the goldfields. There are ditches in Trinity County that originate at seven and eight thousand feet in the Trinity Alps that carried water almost thirty miles.

Route Planning Using GPS


My intention was to end this discussion with waypoints and routes, then I found USGS maps of the Plainfield Quadrangle.

Understanding Skim Bar Placers


Perhaps the most notable thing about skim placers is that they form on the top surface of gravel bars, as opposed to coarser gold placers where the weight of the gold particles allows the gold to settle down on or near bedrock.

Ask the Experts


Bismuth oxide for assaying?

A New Method for Handling Stubborn Gravity Middlings


The solution focused on the relative difference in malleability between gold and waste, rather than the difference in density exploited by gravity circuits.

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The Bawl Mill   • Ask The Experts: Could you expand on your previous blasting article?   • Ask The Experts: “Energy” coming from black sand?   • Ask The Experts: Assay problem or recovery problem?   • Legislative and Regulatory Update   • Detecting Strategies for Heavily Forested Areas—Part II   • The Winning Hand   • Early Winter Detecting in the Sierras   • Gangue Minerals - What Do They Tell Us?   • Mining Districts in Montana Get Organized   • Feds Deny Lease Renewals for Minnesota Mine   • Obama Administration Moves to Block Mining Near Yellowstone   • The Perfect Response   • MMAC Update   • Mining Stock Quotes and Mineral & Metal Prices   • Melman on Gold & Silver

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