The Dink Network

I'm on my way to the earth knight, but in the labyrinth i''m stuck. I managed to blow a few barrels of dynamite, but now there are two barrels i can't destroy. One to the complete west, blocked by a little island with rocks from the right, and the second barrel slightly south to that, in a screen where the are a northern and a southern path. The southern path i managed to free, but the upper path i just can't figure out how to blow the dynamite. Anybody has a good suggestion?