Mantle Minerals Limited operates as a junior exploration company in Australia and the United States. It explores for lithium, gold, and nickel deposits. The company primarily exploring at its Robert's Hill gold project, which is located north of De Grey Mining's discovery at Hemi in Western Australia. The company was formerly known as Caeneus Minerals Ltd and changed its name to Mantle Minerals Limited in December 2022. Mantle Minerals Limited was incorporated in 1998 and is based in Nedlands, Australia.