Deal leaves the Japanese trading house with a 12% interest in the open-pit operation, the world's second largest copper mine.

Higher metal prices and the need to meet a growing global demand for metals has triggered an exploration and expansion frenzy in the region.

Indonesia will now grant miners export permit for unrefined mineral ores, even if construction of their refining facilities is delayed.

The miner will form an Indigenous advisory group to help it better understand issues affecting Indigenous Australians, identify gaps in current protocols and re-establish trust over time.