Mantle Minerals Limited operates as a mineral exploration and development company in Australia. The company explores for gold and nickel deposits. It holds interests in the Yule River project covering an area of 141 square kilometres located on southwest of Port Hedland in the Pilbara region, Western Australia; and the Pardoo Project covering an area of 89 square kilometres situated on northeast of Port Hedland in the Pilbara region, Western Australia.