I think I smell Desert Dirt!
For instance, with regard to ore processing at the Tennessee Mine, the typical and historical values of mine dumps and tailings at the Tennessee Mine have been based primarily on free milling ores and free gold, silver, and other economic base metals found in tailings. Samplings in the past did not focus on the values in the concentrated metal sulfides which are present in the tailings. A simple fire assay would confirm any base and precious metals present in the tailings. Prior to the 1980s, an economic way to process metal sulfide ores did not exist. Thus, these types of ores were discarded with the mine tailings. The first successful commercial flotation process for mineral sulphides was invented by Frank Elmore who worked on the development with his brother, Stanley. The Glasdir copper mine at Llanelltyd, near Dolgellau in North Wales was bought in 1896 by the Elmore brothers in conjunction with their father, William. In 1897, the Elmore brothers installed the world's first industrial size commercial flotation process for mineral beneficiation at the Glasdir mine. Developments in the 1980s by pioneers such as Dr. Richard F. Hewlett and others brought new leaching methods and technologies to this field, such as the economic production of Nevada’s Carlin Trend. The only development that facilitated recovery of the Carlin Trend gold was the fact that the federal government stopped controling the price of gold! Cyanide was not applied to extraction of gold ores until 1887, when the MacArthur-Forrest Process was developed in Glasgow, Scotland by John Stewart MacArthur, funded by the brothers Dr Robert and Dr William Forrest. Hewlett was no pioneer. He did some computer simulation work. He was also censored and fined by the AZ technical board for posing as a professional geologist. This was with regards to his work for NAXOS, a Desert Dirt scam from the 90s.
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