If the mineral rights have been severed from the property and
the owner of the mineral rights does not own the property then
there is no need to notify the property owner. It's possible to own
the mineral rights and not own the property. That would be called
the "mineral estate". The owner of the property if different than
the mineral owner would be the owner of the "property estate".
Being the "mineral estate" owner gives you the same rights as being
a "property owner". You can do as you wish with your mineral
interests. Only time there is a need to notify the property owner
is if any leasing will be going on. Hope this helps.