Modifies a noun

• pipe: Although there are many kimberlite pipes in the world, a large proportion of diamonds are still recovered from alluvial deposits.

• mineral: Kimberlite indicator mineral sampling has been conducted at several target areas and is ongoing.

• indicator: Kimberlite indicator mineral sampling has been conducted at several target areas and is ongoing.

• intrusion: If separation of the continents occurred before kimberlite intrusion in Africa, then the Falklands would be unlikely to have diamond-bearing kimberlite pipes.