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Epithermal Ore Deposits Associated With Tertiary Volcanism—And the Feasibility of Metal Detecting for Them
December 2000 by Jim Straight
Epithermal ore deposits are common in regions of late volcanic activity, especially areas associated with Miocene and later Pliocene extrusive volcanics that have not been deeply eroded since the ore was deposited. Many are simple fissure veins, but stock-works and ore-pipes are also common.
Additional articles that might interest you...
Melman on Gold & Silver
March 2014
...it is beginning to appear that we are recently witnessing a gradual buildup of background information that could lend strength to the arguments for ultimately higher gold and silver prices.
...it is beginning to appear that we are recently witnessing a gradual buildup of background information that could lend strength to the arguments for ultimately higher gold and silver prices.
The Robinson Mine—Big Things Happen Here
January 2013
When I’m traveling through the West, I sometimes take detours that lead me to places that I never knew exist
When I’m traveling through the West, I sometimes take detours that lead me to places that I never knew exist
Opening Ceremony for Buckhorn Mine
November 2008
“When the mine is in full operation, it will be the biggest private sector employer in Ferry County and bring significant economic benefits to the region..."
“When the mine is in full operation, it will be the biggest private sector employer in Ferry County and bring significant economic benefits to the region..."
Global Hunter
January 2008
Chile may be considered geographically a part of Latin and South America, but it is remarkably different from other notable nations belonging to that region such as Mexico and Peru.
Chile may be considered geographically a part of Latin and South America, but it is remarkably different from other notable nations belonging to that region such as Mexico and Peru.
WMD Raffle Raises Funds for Lawsuit
May 2003
On February 6, 2003, the environmental group Siskiyou Regional Education Project (SREP) filed suit in US District Court in Medford, Oregon, against the Siskiyou National Forest (SNF), in a third attempt to ban all suction dredging in the SNF.
On February 6, 2003, the environmental group Siskiyou Regional Education Project (SREP) filed suit in US District Court in Medford, Oregon, against the Siskiyou National Forest (SNF), in a third attempt to ban all suction dredging in the SNF.
Ask The Experts—Using classifiers
December 2010
Q: I would like to know how to use a classifier when I dump my gravel into my sluice box. I would also like to know what sizes classifiers come in. I know that they are in sizes like -3/4. What does the “minus” in the size mean? Thanks for any help you can give me.
Q: I would like to know how to use a classifier when I dump my gravel into my sluice box. I would also like to know what sizes classifiers come in. I know that they are in sizes like -3/4. What does the “minus” in the size mean? Thanks for any help you can give me.
The Significance of Nuggets in Placers
January 2016
Chances are better that both types of gold did not come from the same source. Let's look at the probable conditions to cause two types of gold in a placer.
Chances are better that both types of gold did not come from the same source. Let's look at the probable conditions to cause two types of gold in a placer.
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The Bawl Mill
• Letter to the Editor
• Potaro District, Guyana
• World Gold Council Launches $3 Million Ad Campaign
• Prospecting With Color
• Prospecting for Platinum in Wyoming
• Picks & Pans: More Big River Dredging in Northern California
• A Changing Diamond Industry Looks to Canada for Growth
• History of Mining—Bradshaw Mountains, AZ—Part II
• Company Notes
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
