It is possible to do this with just the base mod. All you have to do is add this to the config file after everything:
types['resource'] = {}
types['resource'].name = 'resource'
types['resource'].tick_min = 60
types['resource'].tick_max = 120
types['resource'].surface = 1
types['resource'].selection_chance = 1
types['resource'].max_place_distance = 2
types['resource'].propagation_chance = {}
types['resource'].propagation_chance['grass'] = 1
types['resource'].propagation_chance['grass-medium'] = 1
types['resource'].propagation_chance['grass-dry'] = 1
types['resource'].propagation_chance['dirt'] = 1
types['resource'].propagation_chance['dirt-dark'] = 1
types['resource'].propagation_chance['sand'] = 1
types['resource'].propagation_chance['sand-dark'] = 1
types['resource'].propagation_chance['out-of-map'] = 0
types['resource'].propagation_chance['deepwater'] = 0
types['resource'].propagation_chance['deepwater-green'] = 0
types['resource'].propagation_chance['water'] = 0
types['resource'].propagation_chance['water-green'] = 0
types['resource'].overrides = {}
types['resource'].overrides['oil'] = {}
types['resource'].overrides['oil'].disabled = true
I'm working on an interface that will allow mods to add things without having to worry about all of the fiddly bits of the config file.
Feel free to modify these settings, as this will allow ore to spread every 1 to 2 seconds, up to 2 tiles away, for every chunk. Using this unmodified will slow down your game when you have lots of chunks.
