Even with a super generous interpretation of "most non-ferrous metallic ore natural resources" - there's Lithium and other alkali metal salts, mined of dried lake beds. I think Group 2 is similar. Also aluminum from bauxite, which is sedimentary. Too lazy to keep googling counter-examples.

That line needs a lot of qualifiers to be correct. Unless they are using "non-ferrous" in some super bizarre way.