
Originally Posted by
desolate
Until 1948, most of the world's rare earths were sourced from placer sand deposits in India and Brazil.[8] Through the 1950s, South Africa took the status as the world's rare earth source, after large veins of rare earth bearing monazite were discovered there.[8] Through the 1960s until the 1980s, the Mountain Pass rare earth mine in California was the leading producer. Today, the Indian and South African deposits still produce some rare earth concentrates, but they are dwarfed by the scale of Chinese production. China now produces over 97% of the world's rare earth supply, mostly in Inner Mongolia,[9][10] even though it has only 37% of proven reserves.[11] All of the world's heavy rare earths (such as dysprosium) come from Chinese rare earth sources such as the polymetallic Bayan Obo deposit.[10][12] In 2010, the USGS released a study which found that the United States had 13 million metric tons of rare earth elements.[13]
New demand has recently strained supply, and there is growing concern that the world may soon face a shortage of the rare earths.[14] In several years, worldwide demand for rare earth elements is expected to exceed supply by 40,000 tonnes annually unless major new sources are developed.[15]
These concerns have intensified due to the actions of China, the predominant supplier. Specifically, China has announced regulations on exports and a crackdown on smuggling.[16] On September 1, 2009, China announced plans to reduce its export quota to 35,000 tons per year in 2010-2015, ostensibly to conserve scarce resources and protect the environment.[17] On October 19, 2010 China Daily, citing an unnamed Ministry of Commerce official, reported that China will "further reduce quotas for rare earth exports by 30 percent at most next year to protect the precious metals from over-exploitation".[18] At the end of 2010 China announced that the first round of export quotas in 2011 for rare earths would be 14,446 tons which was a 35% decrease from the previous first round of quotas in 2010.[19]
As a result of the increased demand and tightening restrictions on exports of the metals from China, searches for alternative sources in Australia, Brazil, Canada, South Africa, Greenland, and the United States are ongoing.[20] Mines in these countries were closed when China undercut world prices in the 1990s, and it will take a few years to restart production as there are many barriers to entry.[16] One example is the Mountain Pass mine in California, which is projected to reopen in 2011.[10][21] Other significant sites under development outside of China include the Nolans Project in Central Australia, the remote Hoidas Lake project in northern Canada,[22] and the Mount Weld project in Australia.[10][21][23] The Hoidas Lake project has the potential to supply about 10% of the $1 billion of REE consumption that occurs in North America every year.[24] Vietnam signed an agreement in October 2010 to supply Japan with rare earths[25] from its northwestern Lai Châu Province.[26]
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