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.
…some miners are doing exceptionally well… with a few obtaining amounts estimated in the millions of dollars.
The historical AJ mine, located east of Juneau, Alaska, was considered the largest gold mine in the state at one time. Joe Juneau and Richard Harris struck gold there in 1880, and it has been more recently known as a tourist destination.
Lately my mind has been involved with group 4 of the transition elements, namely titanium, zirconium, and hafnium. They all have similar chemical properties. Of greatest interest to economic geologists and miners is that these valuable elements often occur together in sands.
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.
If developed with metal detecting in mind, this virgin ground could be a bonanza for nugget hunting.
Only the famous Kennecott copper mine was able to continue operating through the Depression owing to the exceptional richness of its ore.
When I was a student in the College of Mines at the University of Utah, the Verde district was used as an exploration model for “submarine volcanogenic massive sulfide deposits.” So I looked forward to visiting this district and the town of Jerome in central Arizona in the spring of 2012.
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