Think its to do with the metallurgical testing see quote below...

Think its to do with the metallurgical testing see quote below from previous announcement, but whatever the news is its significant enough for a trading halt, on the back of this management need to start a major roadshow & get the story out there, to much being ignored by the market, they have a major vanadium resource & 1.2m oz gold + the rest for $13m market cap, attract the right investors could be multiples higher with little effort

"2). Metallurgical testing is on‐going in order to assess methods of further improving the vanadium recovery from both composite and improving the vanadium grade of the concentrate produced, the results of which will be released when they become available. "