“The scientists have also found the VDVF system has a very energetic heat flux (the amount of energy it emits into the surrounding ocean) of around 500 megawatts. This is much more than would be expected since the VDVF, on the slopes of an underwater mountain and away from a large magma supply, is on the edge of a spreading area and not in between two separating tectonic plates. The unusual positioning of this new vent field suggests that other similar ones elsewhere in the world may have been overlooked.”

http://www.geologypage.com/2015/12/new-kind-of-hydrothermal-vent-system.html#ixzz3v6BOe4xm

http://www.southampton.ac.uk/news/2015/12/hydrothermal-vent.page