Prospector Mod turns normal mining into surface mining. To get at the extra ore, one must research Advanced Mining and Deep Mining and use the relevant prospector buildings near resource patches and give them time to find deeper ores. Vanilla ore patches are less rich as a result, but with a heavier investment in mining more ore is possible.
Ore exists in three tiers. Normal, veins, and seams. Placing prospectors near to (within 12 tiles of) ore will start the process of finding deeper, richer ores. Enriched ore adds a tier multiplier plus whatever remaining ore to the patch, but makes mining of that ore slower.
This mod should be compatible with other mods that add new ore types.
Note: Fracking is now it's own mod. Get it here: Fracking