The reserves of giant rare earth ore at the bottom of the Pacific Ocean are 1,000 times that of land.
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The British "Natural Geodesy" magazine published a report on the 3rd that Japanese researchers surveyed the seabed rare earth content in various locations in the Pacific Ocean (601099), showing that the Pacific Ocean bottom mud contains abundant rare earth resources. However, some experts pointed out that the current development of submarine rare earth mines is also facing problems such as high cost and environmental impact. Researchers at universities such as the University of Tokyo in Japan investigated the rare earth deposits at the seabed in 78 locations in the Pacific Ocean. The results showed that the seabed in the southeastern Pacific Ocean and the Hawaiian Islands contained large amounts of rare earth. The deposit is located at a depth of 3,500 to 6,000 meters under the Pacific Ocean and covers an area of ​​11 million square meters. The researchers estimate that the reserves of the deposit are between 80 billion and 100 billion tons. In some seabeds with high rare earth content, the amount of rare earth can be extracted from the seabed mud of one square kilometer area, which is equivalent to the current global rare earth year. One-fifth of the demand. The current US Geological Survey results show that the global proven rare earth reserves are only 110 million tons, mainly buried in China, Russia and other former Soviet countries and the United States. In addition, the researchers also said that the rare earth resources explored this time can be extracted from the seabed sludge using acidic substances. Scientists have explained that as long as these acids are not dumped in seawater, mining will not pollute the environment. The bigger question should be whether it is technically feasible to extract the seabed silt from such a deep seabed, and whether such mining is economically cost-effective.