In an effort to receive more financial benefits from mining operations, the government's proposal will also require investors in the sector to get legislative approval before operating.
OZ would begin construction of its Carrapateena copper mine in Australia, the country's largest undeveloped copper project, which it estimated would cost A$916 million ($724 million).
Copper output in Congo, Africa's top producer of the metal, rose 15 percent year-on-year in the first half of 2017 to more than half a million tonnes, and cobalt production surged 27 percent to almost 40,000 tonnes, the central bank said.
The monument, one of the 27 President Trump is taking a second look at, covers 1.3 million acres (about 5,260 square km), and it includes land considered sacred to Native Americans.