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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...
Prospecting Australia—Part III Anatomy of a Nugget Patch in Western Australia
December 2011
One of the most memorable nuggets I found in Australia was detected on the very last day that I was out prospecting. I was going along swinging my coil and I came across a blaring loud signal that almost blew my ears off.
One of the most memorable nuggets I found in Australia was detected on the very last day that I was out prospecting. I was going along swinging my coil and I came across a blaring loud signal that almost blew my ears off.
Oil Seeps in Northern California
July 2001
Indians used asphalt from oil seeps in California for caulking boats and other objects long before the white man arrived. Spaniards noted seeps as early as 1542, and the Portola expedition in 1769 used oil for wagon axles and as a fuel. Spaniards also used crude stills for obtaining lamp oil for use in the missions.
Indians used asphalt from oil seeps in California for caulking boats and other objects long before the white man arrived. Spaniards noted seeps as early as 1542, and the Portola expedition in 1769 used oil for wagon axles and as a fuel. Spaniards also used crude stills for obtaining lamp oil for use in the missions.
Why Environmental Groups Prefer Kerry
October 2004
President Bush signed Executive Order 13352, “Facilitation of Cooperative Conservation,” on August 26, 2004. The order instructs the departments of the Interior, Agriculture, Commerce and Defense, and the Environmental Protection Agency to carry out their activities in a manner that “takes appropriate account of and respects the interests of persons with ownership or other legally recognized interest in land and other natural resources” and to “properly accommodate” local participation.
President Bush signed Executive Order 13352, “Facilitation of Cooperative Conservation,” on August 26, 2004. The order instructs the departments of the Interior, Agriculture, Commerce and Defense, and the Environmental Protection Agency to carry out their activities in a manner that “takes appropriate account of and respects the interests of persons with ownership or other legally recognized interest in land and other natural resources” and to “properly accommodate” local participation.
Fabulous Florence—The Golden Town of Idaho
May 2012
In September 1861, on a round-about prospecting journey homeward, five California gold miners discovered gold in the area now called Florence. While watering the horses, one of the men noticed a golden color on a piece of slate bedrock in the stream...
In September 1861, on a round-about prospecting journey homeward, five California gold miners discovered gold in the area now called Florence. While watering the horses, one of the men noticed a golden color on a piece of slate bedrock in the stream...
Ask the Experts
January 2015
• How do I clean up gold encrusted with iron-sulfides?
• How do I clean up gold encrusted with iron-sulfides?
Cedros Island, Mexico
September 2002
Cedros Island, 134 square miles in area, lies in the Pacific Ocean, 14 miles off the west coast of Baja California. It is 265 miles south of Ensenada and 340 miles south of San Diego. It is one of the few Mexican islands that is inhabited, with the fishing village of Puerto Cedros having a population of 400.
Cedros Island, 134 square miles in area, lies in the Pacific Ocean, 14 miles off the west coast of Baja California. It is 265 miles south of Ensenada and 340 miles south of San Diego. It is one of the few Mexican islands that is inhabited, with the fishing village of Puerto Cedros having a population of 400.
The Madonna Nugget
October 2013
It was down deeper than I expected for surface trash. It wasn't until I was down six inches that the target screamed from my scoop.
It was down deeper than I expected for surface trash. It wasn't until I was down six inches that the target screamed from my scoop.
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The Bawl Mill
• Letter to the Editor
• Potaro District, Guyana
• World Gold Council Launches $3 Million Ad Campaign
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• History of Mining—Bradshaw Mountains, AZ—Part II
• Company Notes
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
