I noticed that the parent company in this operation is having a number of problems.
Basically the Wolfram ore is a bit too claggy for extraction.!
Consequently they are not getting the production they had hoped for.
As a result of this, and the lower market price for the metal they have had to accept a loan from one of their investors.
They are undergoing some exploratory sampling to look for a cleaner ore.
Presumably the claggy stuff could then be blended in with it, and result in better production.