Selenium, Mercury and Suction Dredging—Studies Contradict CA State Water Resources Board
April 2013 by Scott HarnFederal and state regulatory agencies often cite mercury and methyl mercury in our waterways as a major factor for further restrictions on placer mining, and on suction gold dredge mining, in particular. However, these regulatory agencies are minimizing selenium and its neutralizing effects.
Many miners know that lead is very commonly associated with silver values, but the truth is that it is also associated with gold values in many locations as well.
The amount of gold in the traces from the low-grade scattered veinlets may be much more than the traces from the small but rich pocket, at least until the pocket hunter closes in on the rich pocket. Further confusion arises if the prospector stumbles across a placer deposit on one of the higher peaks.
...I decided to excavate the semi-frozen high-bank that was resting on a soft shale bedrock footing. Within three feet, I encountered an intrusive!
Once you have a detector, learn how to use it and get out in the field—you can’t find anything with it in your garage.
Our research indicated this whole area had been claimed by Newmont mining company for several years, but when the price of gold dropped they let the claims expire, and we confirmed this with the local BLM office.
This article will hopefully provide a few constructive hints on how to use your downtime during the cold winter and the wet spring to best prepare for the upcoming nugget-hunting season.
Looking at the exceptions to the basic rules is sort of an advanced prospecting discussion, but the readers of ICMJs Prospecting and Mining Journal are plenty able to handle it.
The Bawl Mill • Ask the Experts - processing plants that can extract rare earth metals • Ask the Experts - what does MDB&M stand for? • Ask the Experts - proper mining claim procedures • The Hughes Creek Placers, Montana • Benefits of a Detecting Partner • Excavator Testing Wet Placer Ground • Hard Rock Milling: A Matter of Scale • Paperwork Guy—A Cautionary Tale • ICMJ Online Forum Now Available • Detecting For Gold—Are You Up For It? • A Trip Down the Yukon River • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices