IGO says its takeover of nickel producer Western Areas might fall through after an independent expert concluded the offer was "neither fair nor reasonable".
While Zimbabwe has the world’s third-biggest reserves of platinum-group metals, plus gold, diamond and chrome mines, development has been stymied by political instability.
It marks the first time MineHub's blockchain-based platform was used for a transaction between two Chinese companies, for a cargo originating from a global mining company.
Canada last month announced financial support for building two facilities that will make battery materials for electric vehicles, and one battery gigafactory.