Below is what the Government of Northwest Territories is thinking
"Likely prospects for near term development include:
- De Beers, Gahcho Kue - diamonds
- Tyhee, Yellowknife Gold Project
- Fortune Minerals, NICO Project - gold, cobalt, bismuth
- Avalon Resources, Thor Lake - rare earth metals"
Above exerpt from one of the websites belonging to the government's Department of Industry Tourism and Investment. Some other interesting reading on the site as well.
http://www.investnwt.ca/economic-sectors/mining