Castle Minerals Limited engages in the exploration of gold and other mineral deposits in West Africa and Australia. It explores for lithium, graphite, gold, and base metals. The company holds 100% interests in Meekatharra projects; and 80% interests in Pilbara projects, as well as Earaheedy Basin project, and Donnybrook projects located in Western Australia. It also holds 100% interests in Kambale graphite project; and various gold projects located in Ghana. Castle Minerals Limited was incorporated in 2005 and is headquartered in West Perth, Australia.