Well, one could leave this to the market as well. If the Chinese block all exports the price will go up and capital will be available outside China. Sure, there is always a risk that China undercuts the price ot threatens to do so, but that doesn't make much sense as China isn't interested in exporting these minerals. That's the problem.

I'm also sure new miners could reach long time fixed price supply deals with the large consumers of rare earth minerals, which are crucial not mainly for wind power but for hitech armaments.

Peak oil is not an energy crisis. It is a liquid fuel crisis.