What about deep underwater vents, where sunlight can't reach, let alone UV radiation?
The assumed absence of oxygen is only one of the problems with the life-from-rocks guesswork. You see, Miller's experiments proved that life cannot arise by itself, not even with human help.
Ninety-eight percent of Miller's results were poisionous to life (tar and carboxylic acid).
Miller's best results turned out two kinds of amino acids. It takes 20 to make life.
Miller's acids bonded with tar.
Half of the amino acids were right handed. Life needs left handed ones.
The smallest proteins have 70 amino acids- all left handed. All 70 need to be in a precise order.
What you guys really need to reproduce in the laboratory is something from nothing as in the BB when nothing exploded and produced everything in this universe.