2001 A Space Odyssey. Saturn's rings/Mile tall Monolith

[PoolBoyG]

During the scene in which the mile tall Monolith is discovered on one of Saturn's moons, it says that "In it's making, a moon had been shattered, and the debris of its creation orbits still." The debris is what formed the Rings.

My question is, do you understand the sentence to mean that the giant Monolith was created in some way by utilizing (resources?) a moon? Or that a moon was accidentally destroyed while the Monolith was being assembled/put in place?