If I can't find any non-standart ore at far distant areas, I can suppose only two reasons:
1. wrong mod - can't spawn ore well during the game
2. wrong map/save - I started my current game with Factorio 1 and old version of mod (but now I use Factorio 2 with last version mod)
Any way I hope to possibility to continue my current game, because it takes a lot of game-time, and I don't wanna just lost it.