I've not looked at the code, but does just the size grow or does the density/resources per square also increase?

Two thoughts I had when seeing this.
You should make that resources hurt the player, that way he has to mine it to get rid of them.
Have resources shrink over time so you have to mine them as soon as you find them or lost them. Will force you to keep exploring for now patches.

Right now just 10 of ore near the another one.

cool idea, are you planning on expanding this mod and making it actually useful ? also is this just a debug thingy https://i.imgur.com/HdRIwRo.jpg

Yes, I want to make it better.
It needs a lot of optimization, the game loading time is just too huge, sometimes it needs about a few minutes. I have an idea how to make it in 0.1.0.
May be ore growing comes from the pollution, why not. Mining drills are too slow, they are need to be much faster to protect you from ore growing, especially by small maps. Yeah, ores must grow not too fast by small maps.

how about spawn points for ore, ALA Tiberium veins from C&C\Sand piles from Dune?