California: The Land of Big Nuggets—Part II
January 2018 by Chris Ralph
There are a number of Tertiary river channels in the area, most of which trend south-southwest. They tend to be steep, narrow, and rich with coarse gold.
In 1967, a local resident showed me a pouch of small gold nuggets and flakes. Several years later I asked the same person where that gold was found. He responded, “From the streambed below the old stamp mill at Apex.”
In this case, signs of gold were found at the bottom of the alluvial and then traced in a triangle up the face of the mountain until they stopped—that is where the digging began.
Has your experience ever led you to wonder why some gold is deposited on bedrock and in crevices, while other gold is not? We’re going take a deeper look at this and see what we can figure it out.
While both zinc and lead deposits also are enriched by the surface weathering process, in part two we will look at the enrichment process for copper and also gold deposits, and at the interpretation of leached outcrops to figure how rich the concentrated deposits below them may be.
Copper is a critically important metal that we need to run our modern electronic society, and the long term outlook for this metal is for a steady increase in price.
It also happens sometimes that glaciers will bury valuable placer deposits. This occurs when the glacier goes over the top of an existing placer deposit.
The Bawl Mill • Legislative and Regulatory Update • How to Interpret Assay Values • Bedrock Nugget Hunting: Tools of the Trade • A Primer on Bitcoin and Other Cryptocurrencies • Gold Hunting on Libby Creek • PLP and MMAC Update • Man's Best Friend • An Interview with Minelab Engineer Mark Lawrie • Third Largest Nugget in Existence Returns to Dallas • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices