This is the fourth or fifth time I've seen references to undersea mining on this topic. Maybe you mean drilling for oil.
I'm a mining jounalist and even if the technology existed to extract minerals from the ocean floor it would be economically unfeasible. It's hard enough to raise financing for land based resources close to infrastructure even during a period of high commodity prices.
On the other hand, The continental shelf extends out 600 miles from the northern Alaska coast and would be in the US's EEZ if it signs. Otherwise, it will be claimed by another nation.