Acacia Mining management locked out of talks with Tanzania as .Jul 4, 2017 . The management of stricken gold mining company Acacia has been . be a party to the negotiations between Barrick and Tanzania, which are.barrick gold mining in tanzania,UPDATE 4-Barrick Gold to hold talks with Tanzania over export rowJun 14, 2017 . Barrick Gold'schairman and Tanzania's president met on Wednesday . disputeover an export ban which has hit Barrick's Acacia Mining PLC.