Cause of Samarco dam collapsenot yet known: BHP

摘要

Australian mining giant BHP Billitonsaid the cause of the collapse of the ironore tailings dam at Samarco’s Minas Geraisoperations in Brazil had not been determined,but that it was continuing to support bothrescue efforts and the investigation.BHP Billiton owns a 50% stake inSamarco's iron ore operations with Brazilianminer Vale holding the rest.