History & Geology
"Gold Rush: Alaska" in the Porcupine Mining District
June 2011 by Jim Halloran
Honestly, I don’t believe it is likely there would be a glory hole where they described one at the bottom of the waterfall because plunging water with enough energy to scour out a large hole in bedrock would have the scouring ability to grind up and...
Additional articles that might interest you...
The Many Facets of Iron
March 2013
I’ve been fascinated by iron minerals for many years. So let’s take a look at this very interesting and colorful element.
I’ve been fascinated by iron minerals for many years. So let’s take a look at this very interesting and colorful element.
The Seven Troughs Mining District
September 2016
The favorable geology of the northeastern and central parts of the Seven Troughs Range are the parts most interesting to prospectors. They are underlain by a thick sequence of Tertiary volcanic rocks, mostly rhyolites and andesites.
The favorable geology of the northeastern and central parts of the Seven Troughs Range are the parts most interesting to prospectors. They are underlain by a thick sequence of Tertiary volcanic rocks, mostly rhyolites and andesites.
Prospecting With The Help of Fluvial Geomorphology
March 2011
Quiz yourself about the stream in figure 5. Based on your previous knowledge of where gold is found in a stream and in this article, where do you think you will find the most gold?
Quiz yourself about the stream in figure 5. Based on your previous knowledge of where gold is found in a stream and in this article, where do you think you will find the most gold?
The Birimian Greenstone Belts of West Africa
June 2013
A few years ago I had a tremendous opportunity to visit Australia and hunt for gold there. The geology of the gold deposits there was somewhat different from what I was used to here in the US. I learned a lot about greenstone belt gold deposits while prospecting them in person, and it was an amazing trip.
A few years ago I had a tremendous opportunity to visit Australia and hunt for gold there. The geology of the gold deposits there was somewhat different from what I was used to here in the US. I learned a lot about greenstone belt gold deposits while prospecting them in person, and it was an amazing trip.
The Geology of Diamond Deposits
May 2019
New theories have been developed and they may lead to new discoveries and give prospectors some new insight on where to look for diamonds.
Ask The Experts
July 2015
Q: Is there a correlation between fault zones and mineralization of economic metals?
Q: Is there a correlation between fault zones and mineralization of economic metals?
Gold Depositiion and Gradients of Placer Streams—Part II
July 2012
The steeper the gradient is, the more potential erosive power to move gold and other bedload sediments, and the more power to remove obstacles to flow.
The steeper the gradient is, the more potential erosive power to move gold and other bedload sediments, and the more power to remove obstacles to flow.
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