The River Runs Through It
September 2002 by Bob SchlosserWhy couldn’t we take some cold river water, pass it through some cooling coils and cool the air in the mine? This thought came to me one Sunday afternoon while fishing, knee deep, in the cold Coeur d’Alene River just west of Kellogg, Idaho.
We split up in order to cover a larger area and found good color almost everywhere. The bedrock was shallow on both sides of the river, but the inside bend was where we concentrated our prospecting.
Skarn consists of coarse-grained calcium, magnesium, iron, and aluminum silicates formed by hydrothermal solutions, which replace limestone or dolomite near the contact with an igneous intrusion. The contact metamorphism is usually caused by an intrusion such as quartz monzonite, granodiorite, or similar rock type, which may or may not be mineralized.
Once I have established the presence of gold in the sample, I collect five-gallon bucket quantities of the rock material for processing back at my shop.
The sleepy town of Mariposa, known more today as one of the gateways to Yosemite National Park, was once considered the southern end of the famed “Mother Lode” gold deposits that stretched hundreds of miles throughout California’s Sierra...
This article is intended to try to help someone who is breaking into gold detecting and using a pulse induction (PI) detector.
Mike and I each selected a side of the creek and started to work our way upstream. We both worked the water and sides of the creek, and better than half the gold found in this area is in the water.
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