Meaning of Appurtenance

[Ramin R kamal]

I am just starting out to learn Real Estate and get my license. I was reading some books and I came across a legal term called: "Appurtenance." The meaning of is when a right in a land is inherent to the person as the natural consequences of property ownership. Therefore, whomever leases your land for example, don't own it but have license to do something on it.

Now, here is my question: What if my land has Oil in it. Can the tenant drill or use the natural resources of the land or build upon the land? In general what rights does the tenant have on the land?

Please note: I do not own a land (I wish I did) But I don't. This question is just for learning experience.

Thanks for your input in advance.