Did you switch from a computer to play on Mobile? That's the only reason I can think of that you'd no longer have Smithy or Lucky Oasis as they're not in the app. Once opened, all Repeatable mines (to my knowledge) remain accessible despite switching regions.
In any case, those mines have NOTHING to do with the Riddle Vault of Anubis. I'm in Scandinavia as well and I ONLY play on mobile and can access the Riddle Vault any time (I STILL can't manage to open the last gate!)
Here's a screenshot of where the Riddle Vault is in Mobile, but I don't know how the PC version looks. http://prntscr.com/iqbowy