A Norwegian study has found a "substantial" amount metals and minerals ranging from copper to rare earth metals on the seabed of its extended continental shelf, authorities said on Friday in their first official estimates.
Report informs via Reuters that the resources estimate, covering remote areas in the Norwegian Sea and Greenland Sea, showed there were 38 million tonnes of copper, almost twice the volume mined globally each year, and 45 million tonnes of zinc accumulated in polymetallic sulphides.
The sulphides, or "black smokers", are found along the mid-ocean ridge, where magma from the Earth's mantle reaches the sea floor, at depths of around 3,000 metres (9,842 feet).
About 24 million tonnes of magnesium and 3.1 million tonnes of cobalt are estimated to be in manganese crusts grown on bedrock over millions of years, as well as 1.7 million tonnes of cerium, a rare earth metal used in alloys.
The manganese crusts are also estimated to contain other rare earth metals, such as neodymium, yttrium and dysprosium.
According to the information, further studies were needed to establish how much of those could be recovered with acceptable environmental impact.