Let us help you recover valuable metals. 888-437-1187

Magazine

All Articles

The Fire Assay of Fly Eyes

Colorado-Utah-Wyoming oil shale was first reliably discovered to contain gold and silver by the U.S. Bureau of Mines in the 1920s. Although most of this vast shale resource, up to 1,000 feet in thickness, contained nil or barely detectable values, many brown shale samples fire assayed here over the past thirty years have yielded up to 0.02 ounces per ton (opt) Au and 2.0 opt Ag.

Online access required. Please .

Add a Comment

Additional articles that might interest you...

GM to Cancel Mining Contracts


Governor Brian Schweitzer is calling on the Obama administration to force General Motors to honor its contract with a Montana mining company instead of going overseas to buy the precious metals used to control vehicle pollution.

Just Another Ordinary Weekend


There was no evidence that anyone else had ever worked this gully with the exception of some old sample piles near the foot of the ravine.

Ask the Experts


Treating ore with a plasma torch or shock waves?

The Bawl Mill


• National "Perk" Service
• Can't see the forest through the trees
• Outsourcing the sauce
• I'll be there in "spirit"

Ask The Experts: Can a long range locator probe detect gold in quartz?


Q: I was wondering how such a device could locate a rich gold vein in quartz, for example, since a metal like gold is non-magnetic.

Our Readers Say


• Re: "Designation of Critical Habitat Provides Little Additional Protection to Species"
• Re: "Fair and Balanced?  If You Have the Cash"
• Re: "The Joy of Prospecting"
• Re: "Texas Hill Country Gold"

Ask The Experts


What is claim relocation?

Subscription Required:
The Bawl Mill   • Our Readers Say   • Siskiyou National Forest Update   • Company Looks at Restarting Sunshine Mine   • Piedmont Gold   • Gold & The Dollar   • Picks & Pans: Exploring Wyoming's High Desert   • Sons of Gwalia & Herbert Hoover   • Looking Back   • Prospecting on the Yukon River   • Placer Gold in Arizona   • Bill Could Create New Silver Market   • 2002 Inductees to the National Mining Hall of Fame   • Mining Stock Quotes and Mineral & Metal Prices   • Melman on Gold & Silver   • Mystery of Olmec Jade Solved

Free:
Legislative and Regulatory Update

Advertisements

Garrett Electronics - trusted by real miners & prospectors!
Precious Metals Recovery plants and equipment
Fighting to keep public lands open to the public
Specializing in the processing of precious metal ores!
Watch prospecting shows on your computer right now
Free Online Sample Issue