History & Geology
Prospecting With The Help of Fluvial Geomorphology
March 2011 by Jim Halloran
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?
Confluence Placers
Confluences of placer streams are well known as concentration sites for heavy minerals. The basic reason is that...
Copper Deposits of Alaska
Only the famous Kennecott copper mine was able to continue operating through the Depression owing to the exceptional richness of its ore.
PGMs in the United States
Until just recently, platinum-group metals (PGMs), especially palladium, had been holding their own on the market. But, Russia has now resumed shipments and it has brought prices down.
The Potholes—California’s Oldest Known Mining District
Every time we prospected here we found gold, sometimes some really coarse flakes, but no large nuggets (yet).
Eolian Placer Gold
I would first like to mention that I am not a geologist. I have, however, spent the last 8 years intently searching for gold nuggets with a metal detector. I have found gold in numerous locations, and in several different types of gold deposits.
Silver and Base Metal Deposits of the Pioche District
The areas that were mineralized with the bedded ore were huge and vast tonnages were indicated, although they had no idea at the time.
Iron Ores and Iron Mining
For more than 40 years, iron ore prices have been decided by private negotiations conducted between the largest of the iron miners and the largest steel producers. These two sides dominate both the spot and contract iron ore markets.
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The Bawl Mill
• So You Want To Be A Full-Time Prospector?
• Ask The Experts—Do I still have rights to this mining claim?
• Ask The Experts—What is a "closed" claim?
• Eastern Arizona: Gold and Base Metal Deposits Part II
• Rediscovering Placerville, California Part II
• Oregon Anti-Dredging Bill
• Mud Men: Pocket Miners of Southwest Oregon Part II
• The Gold of Plumas de Oro
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
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