Metal-Mineral Identification Utilizing a Detector
November 2005 by Jim StraightSeldom is a metal detector used for ore sampling today. Nevertheless, this procedure still works as all BFO and VLF detectors have a non-conductive mineral zone and a conductive metal zone with a neutral null zone between them.
In the first part of this article, we took a look at the special geology required to form coarse gold. In the second part, we looked at field examples of coarse gold occurrences and the geology of residual placers.
With every look at the box I was pulling out a few pickers and a nugget or two. The smile I had the previous night just got bigger and bigger throughout the day.
There’s a lot of really great prospecting equipment on the market right now, and I have to admit I’ve spent my share of money over the years investing in dredges, drywashers, metal detectors and the like. But a lot of new folks just getting into...
The time-honored objective in recovering gold from placers has always been to discover and recover gold from the detritus of both known and unknown lodes. The traditional method to recover gold from desert dry placers was to locate and work the enriched gravels known as the “pay streak.” This pay streak was usually found directly over false or true bedrock and within the upper few inches of the bedrock itself.
Excerpts from California Mining Journal, our original title, published 50 years ago this month.
The Delamar (Ferguson) mining district is located in Lincoln County, Nevada, some 29 miles by road, southwest of Caliente. The district is on the west side of the Delamar Mountains at elevations between 5,900 and 6,600 feet.
The Bawl Mill • The Price of Gold—Where It’s Headed and Why • Mining Companies Competing for Labor • Sam, the Tenderfoot Prospector • Placer Gold in Russia • The Rampart Goldfields, Alaska • Tales of California Gold Discoveries 3rd in a Series—Bloody Nick The Miner • Company Notes • Miners Rally Successful • Venezuela’s Chavez Halts Mining Projects • Mining Stock Quotes and Mineral & Metal Prices • Looking Back • Melman on Gold & Silver • Montana Lawmakers Want Economic Review of New Mining Rule