Enrichment of Mineral Deposits by Weathering—Part II
April 2016 by Chris RalphWhile 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.
Silver nuggets have been described as “ultra-rare,” “prized” and “unique.” Naturally occurring silver nuggets are rare enough to suggest caution when purchasing. Fakes have reportedly been produced and misrepresented for sale as genuine specimens.
I suspect detailed geological mapping and prospecting would lead to discovery of one or more overlooked gold deposits in the district even though it has been heavily prospected in the past.
There are several common ways that new mineral crystals form and grow. Perhaps the simplest is when minerals form through the cooling of molten rock and the atoms bond together into mineral crystals.
There is reason to believe these stream valleys are still rich with gold, silver and copper.
If you have been prospecting for any length of time, then you have probably heard something like, “All the gold ever mined would equal a cube 60 feet on each side.”
The big interest to prospectors thinking about the effect of erosion is not what might happen long into the future, but what they might find in the rivers later this summer when the water levels go down.
Only the richest ores could be worked and shipped off for processing at a profit. As a result, early mining in the southern part of the Humboldt Range was short-lived. In the 1880s, placers were discovered in Spring Valley and American Valley on the east side of the range...
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts • Ask The Experts • Ask The Experts • Dry Washer, Wet System or Metal Detector? • Multiple Use Lands, Symbiotic Relations and Conflict Resolution • Vendors Announced for Gold Prospecting and Mining Summit • The Tombstone Silver-Lead District, Arizona • Sold: 87-Ounce Nugget • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices