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History & Geology

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Geology and stories from the past

The Mysterious Telluride Minerals


…let’s dive in and take a closer look at these rich gold and silver-bearing minerals to find out what they are, where they form, and how to identify them.

The Coolgardie Gold Mining Camp of Southern California


The area was mined intermittently from around 1900 to 1915, but was also mined in the late 1800s, with a total output valued at about $100,000, which is around $9.5 million at the current gold price.

Prospecting for Copper—What to Look for on the Outcrop


For the prospector, knowing what oxidized hydrothermal alteration looks like in the field is an important exploration tool.

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Polymetallic Skarn Deposits


Polymetallic skarn deposits are an interesting class of deposits that can contain a number of different types of metals.

All About Lead Minerals, Silver and Gold


Many miners know that lead is very commonly associated with silver values, but the truth is that it is also associated with gold values in many locations as well.

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).

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Sixteen to One Gold Mine: Going Underground - Pt II


We descended hunched over, down a long, steep, wooden staircase to the 1,000-level.

All About Native Silver


Some of the wire forms are strange and fantastic, with wires sticking out in twisted, seemingly random directions. Others have deformed crystals and all of them have significant value to collectors.

Sixteen to One Gold Mine: Unique Challenges and Potential Rewards - Pt I


Many of the Sixteen to One’s challenges arise from its unusual geology and the pocket characteristics of the ore deposits.

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What About Palladium?


Palladium may well be an underexplored element and therefore an opportunity for prospectors and geologists. This is because they are often less than obvious and other than the native metals, a chemical analysis of samples is required to identify PGM-enriched rocks.

Unique Rare Earth Mine in Texas


Exploration for and prospecting in search of similar deposits should focus on rhyolite bodies located in fluorite-bearing areas.

Gold in The Midwest--Part I


Gold can potentially be found in all the glaciated areas of the Midwest, but to find it in any appreciable amount one needs to look to areas where the gold gets concentrated by more recent water flows.

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Gold and Silver Deposits of Bodie, California


Bodie, California, in its heyday, was once rumored to be one of the roughest and most lawless towns in the American West.

Hard Rock and Placer Gold of Manhattan, Nevada


He found 5 to 7 feet of gravel containing half an ounce per yard. This started a rush of placer activity and several other shafts were sunk, with some large multi-ounce nuggets being found.

Silver Peak, Nevada: A Little of Everything


Silver Peak is a small mining community in Esmeralda County in west-central Nevada, about 30 miles west of Goldfield. Although it’s fairly remote, it’s been an important mining center since the early days.

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Mohave County, Arizona: The Oatman/San Francisco Mining District


The Oatman/San Francisco Mining District’s historic gold production of 2.2 million ounces of gold since the 1880s makes this area Arizona’s greatest primary gold producing district.

Reno's 1872 Time Capsule Includes Gold Rush Lore


The Reno Masonic Lodge was built along the railroad tracks back when Ulysses S. Grant was president and shortly after the Comstock Lode of gold and silver was struck in Virginia City.

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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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.

Placer Gold Deposits of New Mexico


While a large number of locations have yielded some placer gold, most of the state’s placer production has come from a few productive districts.

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