Gecamines, the Democratic Republic of Congo’s state-owned mining company, said China Nonferrous Metal Mining Group may invest as much as $2-billion to develop its most prospective copper asset. The Congolese miner in June described the agreement, through which CNMC will finance, build and operate a copper-processing facility at the Deziwa concession before transferring full ownership back to the state-owned miner, as a “new type of partnership” designed to increase revenue for the state, but has yet to provide full details of the arrangement.