Sulphite Ore...Here is part of a article about YNG...and this talks about where they may get the ore from....Newmont can process the standard Au ore...but not the Au sulphite ore (mercury)....Richard
Jerritt Canyon is located just Northeast of the prolific Carlin Trend in Nevada. One of its key assets is its roasting capacity used to process sulfide ore. Currently there are only 3 roasting facilities in Nevada, owned by YNG, Barrick Gold and Newmont. There will likely never be another roasting facility permitted in Nevada due to their lack of popularity with environmentalists. With roasting capacity limited, producers tend to process only their highest-grade ore, while stockpiling their low and medium-grade ore.
In NEM and ABX’s case, they have over 100mm tons of ore combined sitting in Nevada that may never get processed that is listed on their balance sheets as assets. Eventually they will be forced to write-down that ore as liabilities if they cannot demonstrate to their auditors that there is any chance of processing it in the foreseeable future (there are also environmental clean up costs associated with it). Although under prior management
YNG often processed ore on a tolling-fee basis for Newmont, current management is focused on securing a long-term profit-sharing ore-purchase contract to acquire additional mill feed stock.
https://www.gurufocus.com/news_print.php?id=103526