All Articles
Working on the Bear River
January 2007 by Don Robinson
Further downstream our motorized equipment was in play. One power sluice was going a lot, with a crew of four getting familiar with the equipment and working hard to create a holding pond to prohibit the muddy water and the...
Legislative and Regulatory Update
• USFS cost recovery
• Measure 37 affirmed
• Court declines to hear Canyon Resources claim
• Kempthorne nominated to head Interior
How to Recognize Hard Rock Gold Ores
I regularly get inquiries along the line of: “Hey, I found this rock, and I think it might be gold ore. How can I tell?” Prospectors are always on the lookout for gold-bearing rocks that may be the source of any nearby placer gold.
The First Mine in America
Many people, mostly New Mexico Native Americans, but including this miner, wear turquoise from the first mine in America. I took my blue stones from the old mine by hand labor, underground, a half century ago.
Small-Scale Mining with a Dozer and Detectors
Even the best of metal detectors are only capable of seeing a certain distance down into the sand, gravel and rock of a placer deposit. Once all the gold that can be reasonably seen by a metal detector has been harvested, it can be difficult to...
Thieves Make Off with Tons of Gold & Silver Ore
According to local press reports, about ten armed thieves forced their way into a private freight dispatch yard near the port, subdued employees, and then took several hours to search for the shipping containers…
Ask the Experts
Shaker tables and jigs
How PGMs Affect Assay Beads
Most fire assayers are trained to observe the cupelled beads very carefully, noting any discoloring or surface roughness that might indicate that one or more of the platinum group metals (PGMs) are present. The “clues and tests” I have included in this article stem from several sources, including my 35 years of experience performing torch assays...
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