Japan experts: Huge rare earth deposits found in Pacific

"The deposits have a heavy concentration of rare earths. Just one square kilometre (0.4 square mile) of deposits will be able to provide one-fifth of the current global annual consumption," said Yasuhiro Kato, an associate professor of earth science at the University of Tokyo. The discovery was made by a team led by Kato and including researchers from the Japan Agency for Marine-Earth Science and Technology. They found the minerals in sea mud extracted from depths of 3,500 to 6,000 metres (11,500-20,000 ft) below the ocean surface at 78 locations. One-third of the sites yielded rich contents of rare earths and the metal yttrium, Kato said in a telephone interview. The deposits are in international waters in an area stretching east and west of Hawaii, as well as east of Tahiti in French Polynesia, he said.