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New Study on the Formation of Nuggets—Part I

Geologists have long realized that the vast majority of gold in typical quartz veins is in the tiny, dust-size range, a lot smaller than the gold nuggets found by placer miners. This is common worldwide in many, many gold districts.

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Sulfides, Selenides and Tellurides


The early day miners feared it, and it happened a lot more often than they would have liked: the easily worked rich surface ores they discovered gave way as they mined downward to a vein full of sulfides, base metals and other nasty, rebellious and...

Lode or Placer: What Difference Does It Make?


This explains the large difference in particle sizes between placers and hydrothermal lode deposits, but also means that while the mining may be similar in some cases, the sampling and recovery techniques are usually quite different.

Company Notes


• Pan American Silver Corp.
• Mountain Province Mining Inc.
• Canyon Resources Corp.

Quartz and Chalcedony in Wyoming


Quartz is a common rock-forming mineral found in many shapes, forms, and colors.

DEF Has Another Successful Year


A relaxing trip was long overdue. The deadlines associated with assembling a magazine each month tend to wear on you after awhile. I needed a break. Several organizers of Dredge Earth First were...

Melman on Gold & Silver


Putting it all together, we have indications that the petroleum price increases could continue and we believe that if that is the case, the impact on precious metals would be positive.

Estimating Gold Values in Placer Gravels


The single most important question to be answered when evaluating a placer deposit is: “How much is it worth?” Accurate sampling of placer gravels is essential to obtain a reasonable estimate of the total gold values contained in the deposit.

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