Vulcan cruiser found adrift in the Delphic Expanse in 2153, its crew driven to savagery by trellium ore.
The Seleya was a Vulcan cruiser that entered the Delphic Expanse in the 2150s and went missing. Another Vulcan ship, the Vaankara, was sent to find it, but that ship's crew turned on each other and it was destroyed.
In Impulse, Enterprise answered a distress call and found the Seleya adrift in an asteroid field rich in trellium ore, which proved to be a neurotoxin to Vulcans and had driven its crew to savage violence. Archer, T'Pol and Malcolm Reed fought their way out as the ship exploded, and T'Pol was treated for the same symptoms.