A walkout began at Glencore?s Koornfontein Mine in South Africa on October 17th over the fact that workers in that mine were paid considerably less than workers in other mines. 500 workers represented by the National Union of Mineworkers participated in the walkout.
See "Glencore Coal-Mine Workers Strike Over Compensation for Job Cuts", Paul Burkhardt, Bloomberg News, October 20, 2014