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Flat-Fault Gold
August 2001 by Edgar B. Heylmun, PhD
Gold and other valuable metals are often deposited in breccia and rubble formed by flat or gently-dipping faults. Such faults are commonly found in areas of crustal stretching caused by the movement of tectonic plates. Flat-faults are especially common in southeast California, southern Arizona, and northern Sonora, Mexico. However, they can be present anywhere that crustal stretching has occurred.Using Structural Clues to Locate Buried Placer Channels
They must have assumed the paystreak was spotty and had been mined out, so they never mined as close to the side of the valley as they should have.
Oregon Requires Permit for Hand Sluicing
At the time of this writing the draft permit for dredging in Oregon, which may also include small-scale operations like hand sluicing or possibly even panning, was not available for public comment or review.
Picks & Pans: Gold Recovery in Placer Mining Operations
Two of the major factors affecting the profitability of a placer mining enterprise are the relative efficiency of the mining equipment, and the rate and percentage of recovery obtained while conducting mining operations.
Green Valley Gold District, Payson, Arizona
Most gold-bearing quartz veins found in the district were fracture fillings in faults enclosed by crushed quartz zones along their margins. Since the host rocks were often extensively weathered, portions of the veins stood out as positive, resistant outcrops. The gold-bearing veins ranged from a few inches wide to the vein at the Gowan mine that was as much as 12 feet wide. Over The Divide—Merwin (Merv) H. Hemp
It is with great sadness that we inform you of the passing of one of our long time members and tireless workers, Merwin H. Hemp.
PLP Update
We anticipate there will be a change in party leadership in possibly both the House and Senate following the November 2022 mid-term elections…
An Expensive Lesson
Alaska is a land of extremes and the weather is no exception. By the time we reached the mighty Yukon River we could see a dark line of clouds stretching from east to west as far as the eye could see.
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