Wilfley Tables—Repair, Rebuild & Set Up

September 2014 by Roger Neuscheler

Progress Continues in Honduras

May 2016

He had meetings with Honduran officials at all levels, set up a new corporation called Raptor Mining in El Corpus, Honduras, and is in the process of establishing a non-profit called “Step Up for Honduras.”

Selenium, Mercury and Suction Dredging—Studies Contradict CA State Water Resources Board

April 2013
Federal 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.

Proper Assaying of Placer Samples

November 2012
The whole purpose of sampling mineralized ground is to measure the values in a small volume of material that would be representative of a much larger volume of similar material. The key word is representative. Chemical and fire assaying will not accurately represent placer deposits by themselves.

How to Field Evaluate A Placer Property

January 2015
If there is misleading wording anywhere, it will be in the sample data and in reserve/resource estimates.

Cyanide-Free Gold Separation

February 2011
Some ores—mostly those with a high free gold content—are very amenable to gravity concentration. Well oxidized ores containing coarse gold are usually best for non-cyanide processes. Ores with significant sulfide content may require the...

Recovering Fine Gold with Oleophilic Adhesion

April 2014
Oleophilic means "affinity to or attracted to oils," and this includes gold an diamonds.

Gold in Quartz

February 2016
Because quartz and gold may be deposited together across a considerable range of temperatures, not all quartz veins are the same, and there are several different types of gold-quartz deposits.

Subscription Required:
The Bawl Mill   • Ask the Experts   • Ask the Experts   • Taking on the EPA, Sasquatch, Ratchilla and Gold Dredging   • Gully Prospecting and Mining   • Designing and Evaluating Placer Gold Recovery Plants   • Finding Streams of Gold   • This is Why You Check Your Tailings   • Lode or Placer: What Difference Does It Make?   • New Rules to Impact the Lease/Buy Decision   • There's a First Time for Everyone   • Appeals Court OKs Permits for Upper Peninsula Mine   • Melman on Gold & Silver   • Mining Stock Quotes and Mineral & Metal Prices

Free:
Legislative and Regulatory Update   • Mining Journal Honored as Prospecting Magazine of the Year!