Out in the Mojave Desert in California lies the Mountain Pass mine, once the world’s foremost supplier of valuable rare earth minerals — 17 elements deemed critical to modern society. In an age where China controls 80 percent of the global output of these minerals, it is strange to believe that a once-dominant source sits within the United States. Stranger still is the tale of how this mine came to supply the Chinese rare earths industry.
In 1952, Mountain Pass opened. First explored as a uranium deposit, it soon supplied rare earths for the electronic needs of the Cold War economy. Until the 1990s, it stood alone as the only major source of rare earths worldwide.
By 2002, however, the mine was defunct. In the eyes of the U.S. government and major manufacturers, it no longer made sense to acquire rare earths from a U.S. source subject to stringent environmental regulations.