The Yellowhead Institute has produced a “Mine Sweeper Map” which according to them is “only the publicly accessible and searchable map of mining claims linked to First Nations in Ontario and Quebec.”
The map is updated on a daily basis using publicly available information and has multiple lawyers to explore. Also note, that the map does not display treaty boundaries, only reserve boundaries.
If you are teaching geography, mapping of any sort, or are speaking about the scope of mining in either Ontario and Quebec and its impact on Indigenous Nations, this resource will be super illustrative for your students.