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Estimating Gold Values in Placer Gravels
May 2005 by Staff
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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Ask The Experts—Is it possible for a mountain range to have good lode gold deposits and yet the area streams not carrying like deposits of gold?
May 2011
Q: Is it possible for a mountain range to have good lode gold deposits and yet the area streams not carrying like deposits of gold? Or do the two go hand-in-hand?
Q: Is it possible for a mountain range to have good lode gold deposits and yet the area streams not carrying like deposits of gold? Or do the two go hand-in-hand?
Ivanhoe Partners With Rio Tinto
November 2006
Ivanhoe Mines announced that Rio Tinto will invest $1.5 billion to engineer, construct and operate Ivanhoe’s Oyu-Tolgoi copper and gold project in the South Gobi region of Mongolia.
Ivanhoe Mines announced that Rio Tinto will invest $1.5 billion to engineer, construct and operate Ivanhoe’s Oyu-Tolgoi copper and gold project in the South Gobi region of Mongolia.
Mining Boom Is Back In Northern Nevada
April 2007
At the Gold Quarry open-pit mine, a massive electric shovel scoops 40 tons of earth in a single bite and dumps it into a 325,000-pound truck the size of a two-story house.
At the Gold Quarry open-pit mine, a massive electric shovel scoops 40 tons of earth in a single bite and dumps it into a 325,000-pound truck the size of a two-story house.
Our Readers Say
January 2002
• "Thank you..."
• "...dredges under 8" need not be regulated"
• "Thank you..."
• "...dredges under 8" need not be regulated"
The Ups and Downs of Geologic Faults
May 2011
Faults are fractures, breaks and broken zones in the Earth’s crust where one side of the break has moved relative to the other, and they come in many different varieties.
Faults are fractures, breaks and broken zones in the Earth’s crust where one side of the break has moved relative to the other, and they come in many different varieties.
The Klamath Mountains
September 1999
Over 7 million ounces of gold have been produced in the Klamath Mountains of northwestern California, 64% of which has been from placers.
Over 7 million ounces of gold have been produced in the Klamath Mountains of northwestern California, 64% of which has been from placers.
Randsburg—Still Going Strong
June 1999
Soon after the rich gold discoveries at Ballarat, near Death Valley, prospectors fanned out all over Southern California's Mohave Desert. Minor discoveries were made in many dry washes, gullies, and desolate areas, but no discovery has had the impact of the one that Frederick Mooers, John Singleton, and Charles Burcham, made in 1895.
Soon after the rich gold discoveries at Ballarat, near Death Valley, prospectors fanned out all over Southern California's Mohave Desert. Minor discoveries were made in many dry washes, gullies, and desolate areas, but no discovery has had the impact of the one that Frederick Mooers, John Singleton, and Charles Burcham, made in 1895.
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• Looking Back
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