Labour groups rally around locked out Rio Tinto borax minersMar 8, 2010 | News The 600 workers were shut out of the world’s second largest borax mine on January 31 after a five month contract dispute with Rio Tinto. See http://www.minesandcommunities.org/article.php?a=9945.Related posts Rio Tinto's Borax workers speak out Rio Tinto in dispute with Borax workers in California Utah groups sue Rio Tinto subsidiary for air pollution