Glencore Cobalt Supplies in DR Congo Face Hold Up Over Mine Row between Gécamines and GFI 19 avril 2017 Mining Partager By Tom Wilson(Bloomberg) – A dispute between state-owned Gécamines and its joint-venture partner at a Congolese cobalt mine that supplies Glencore Plc threatens to halt the supply of as much as 4 percent of the metal within two months.