UPDATE: even through the item isn't in your inventory and you cant get into the area from the bottom, you still seem to be able to switch off the force field from above where the frosty ghosts are. The orator at the entrance to the Broken Echos Silver Mine, asks you to go in and retrieve something which requires you to have an Essence Phylactery. He says he gives it to you but he doesn't so you cant do the quest. The zone is South Broken Road. South Broken Quest more like.