Exploration Update On Rio Tinto’s Winu Project

As announced on 27 February 2019, Rio Tinto has discovered copper-gold mineralisation at the Winu project in the Yeneena Basin of the Paterson Province in Western Australia. A significant programme of work has continued at the Winu camp in recent months with 180 people now onsite. The following notes additional data on the intercepts for the 11 diamond drill holes reflecting drilling to the end of 2018. In addition, some assay data has changed as a result of quality control and assurance activities.

Significant intercepts for the eleven diamond drill holes not previously available in full, as well as all previously reported results. Results continue to indicate relatively wide intersections of vein style copper mineralisation associated with gold and silver beneath relatively shallow cover which anges from 50 - 100 m. The mineralisation remains open at depth and to the east, north and south.