Definitely. You can probably mine uranium on Mars but that would require a bunch of infrastructure and other power sources. These babys are way down-rated so they can run on a single loading of fuel for decades, like nuclear submarines. Good old E=MC^2.
I don't think there is any uranium to be had there. For such heavy elements to get deposited in ore near the surface takes special circumstances, such as those of Earth.
What pertinent "special circumstances" do you mean?
Tectonic activety I suspect.
Tharsis region?
When was anything there last active?
Does it matter? It's not as if the deposits migrate.
On Earth they certainly do, if you choose the right time scale.
Right, because the Earth has tectonic activity. Mars? Not so much. Geology should have been stable over the 500 million years since Mars last had significant geological activity.