Hycroft Mining Holding Corp (HYMC)

[Wmucca]

You really need to read some of the older technical reports
Stockpiles (waste dumps) were drilled and then mined and processed between 2010-2013 (150 M tons I believe)
Technical reports dating back to the early 2000’s characterize the Silver in the oxide as primarily Silver Chlorides and subsequently not amenable to cyanidation. Silver recovery’s were historically low in the oxide mining
Later technical reports indicate the deeper silver mineralogy is amenable to cyanidation but the higher grade Vortex silver is refractory and needs oxidized prior to cyanidation