All Articles
Oregon Dredgers Receive Threats From Environmentalists
June 2004 by Scott Harn
Oregon dredgers have been receiving notices of intent to sue for violations of the Clean Water Act (CWA) from the Northwest Environmental Defense Center (NEDC).
Indicators and Hillsides
The placer gold shows up in ground sluice areas, hydraulic pits, secondary channels and hillside diggings. It is coming down the hillsides from an ancient channel left high and dry millions of years ago.
Company Notes
• Southern Era
• X-Cal Resources
• Placer Dome Inc.
• Pan American Silver Corp.
• Vista Gold Corp.
What To Do When Gold Recovery and Assay Values Differ
Before going into an analysis of the ore composition, two other major factors will affect the result. These are the accuracy of the assay and the effectiveness of the mill for the gold recovery.
Looking Back
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
Where To Find Diamonds
Where to find diamonds in the United States: It is somewhat common for gold prospectors to find diamonds in black sand concentrates and not recognize them.
Desert Bonanza
If you think all the vein gold near the surface has been dug up—think again! A weekend prospector recently came into the lab with a shoe-box full of samples that were from ten to fifty percent native crystalline gold on dirty white quartz.
Platinum—Group Metals
by Henry E. Hilliard
Excerpted from USGS "1998 Annual Review"
Subscription Required:
The Bawl Mill
• Higher Copper Price Brings Hope, Jobs
• Zeballos Gold Camp, British Columbia
• Agreement Allows Pogo Mine to Resume Construction
• Treasure Hawk Mine Back in Action
• Understanding Hard Rock Mining: Terms and Methods—Part I
• Mood at Calgary Conference is Subdued, But Optomistic
• Reinventing the Wheel—The Infinity-Jet
• Company Notes
• Endangered Species Act is a Mess
• Placer Platinum
• Here Come the MineBots
• Agency Gives Initial Backing to Kensington Mine
• Mining Stock Quotes and Mineral & Metal Prices
• Looking Back
• Melman on Gold & Silver
• Brits Thwart Robbery of Gold and Cash
