All Articles
Mineralized Calderas in Colorado
May 2002 by Edgar B. Heylmun, PhD
A caldera is a large circular volcanic depression caused by collapse due to the removal of molten magma from an underlying magma chamber. The removal of magma is due to explosive venting of lava and pyroclastic material.
Additional articles that might interest you...
Addressing EPA Overreach: What Dredgers Need to Know
March 2016
The Environmental Protection Agency (EPA) has been attempting to extend their authority and intimidate miners and other public land users for decades. Suction gold dredgers are no exception, and we want to highlight a recent example of how to deal with this federal overreach.
Finding Gold with a VLF Detector—Part III
June 2014
The higher the sensitivity setting, the louder and sharper the signal from a gold nugget or other metal target.
The higher the sensitivity setting, the louder and sharper the signal from a gold nugget or other metal target.
Trade-Ins, Swaps and Like-Kind Exchanges
February 2017
While most prospectors, mine operators and business owners are aware that “like-kind” exchanges can be an excellent way to postpone the gain resulting when any of the operation’s assets are disposed of, few give any thought to the value...
While most prospectors, mine operators and business owners are aware that “like-kind” exchanges can be an excellent way to postpone the gain resulting when any of the operation’s assets are disposed of, few give any thought to the value...
An Unusual Death in Downieville's Gold Rush
May 2000
While women were extremely rare in the early California gold camps, their relative absence did not always guarantee their safety or protection if they happened to be of Mexican nationality. The most memorable, graphic example of this tendency took place in Downieville, seat of Sierra County located on a fork of the Yuba River.
While women were extremely rare in the early California gold camps, their relative absence did not always guarantee their safety or protection if they happened to be of Mexican nationality. The most memorable, graphic example of this tendency took place in Downieville, seat of Sierra County located on a fork of the Yuba River.
Company Notes
June 2001
• Vista Gold Corp
• Pan American Silver Corp
• Mountain Province Mining
• Vista Gold Corp
• Pan American Silver Corp
• Mountain Province Mining
Simple Sluice Design
October 2002
One of the first pieces of prospecting equipment I acquired was a really nice little aluminum backpack sluice. I’ve used it for some time now and have always been impressed with how well it works for keeping the fine wire gold. But ever since I got on the Internet and started looking around for prospecting stuff, I have been toying with the idea of making a flexible conduit sluice.
One of the first pieces of prospecting equipment I acquired was a really nice little aluminum backpack sluice. I’ve used it for some time now and have always been impressed with how well it works for keeping the fine wire gold. But ever since I got on the Internet and started looking around for prospecting stuff, I have been toying with the idea of making a flexible conduit sluice.
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