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History & Geology

The Geology of Diamond Deposits

New theories have been developed and they may lead to new discoveries and give prospectors some new insight on where to look for diamonds.

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The Amazing Mineral Tourmaline


It is a gemstone, and yet it is also closely associated with many types of metal ores. It's valuable itself but often points toward other valuable minerals—that is certainly something prospectors want to know more about!

Prospecting for Nickel Deposits


The periodic exploration efforts for nickel during periods of high prices have been sporadic and incomplete. There is a role for the prospector and geologist in searching laterites potentially rich in nickel and mafic igneous bodies that may be rich in nickel.

The Giant King Mine


Most gold-bearing veins in this region are controlled by fractures associated with the Melones Fault, a late Cretaceous structure that is 108 to 127 million years old.

Georgetown CA: A Historically Rich Mother Lode Treasure


The interesting thing about the Mother Lode area is that we can pretty much find at least a little gold in any creek or river (and even in some of the many dry gulches).

Exploration Rush at Tonopah, Nevada


A few months later, a young, greenhorn lawyer agreed to pay to have it assayed, and the quartz turned out to be rich in both gold and silver.

Gold Depositiion and Gradients of Placer Streams—Part II


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.

Preserving the True History of the Ivanhoe


My partner had the contacts and it wasn’t long before we had an agreement in place and the company had a geologist on site. I recall a time when he was getting the lay of the land, so to speak, and he broke off a rock sample and inspected it with his magnifier.

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