Seabed volcano observed

Scientists have observed the beginning of a volcanic eruption on the bottom of the ocean off the coast of British Columbia.

The research has implications for the mining industry because of what it may provide in the way of clues about the formation of mineral and metal deposits existing on the mainland.

Jim Franklin of the Geological Survey of Canada says scientists, using sophisticated underwater listening systems and a unique Canadian underwater vehicle known as ROPOS (Remotely Operated Platform for Ocean Science), traced the source of the eruption and collected video images and rock samples. The site of the research, conducted from the ship The Discoverer under the operation of the U.S. National Oceanic and Atmospheric Administration, was the Juan de Fuca Ridge, 250 km from the provincial coastline. During the past month, more than 50 metres of new lava have filled a fissure along the Ridge. Coincidently, hot mineral-laden water is venting from the fissure along its 7-km length.

Huge clouds of bacterial particles are settling from this water on the new lava. It is believed that this layer of bacteria and associated sulphide minerals are unique markers which can indicate the presence of mineral deposits.

ROPOS, capable of diving to 5,000 metres but working at 3,500 metres on this project, was limited by the amount of cable that could be wound onto the winch system.