MacDonald Mines Exploration Ltd. engages in the acquisition, exploration, and development of mineral properties in Canada. The company primarily explores for gold, silver, copper, cobalt, and nickel deposits. It owns 100% interests in the Scadding-Powerline-Jovan project that covers an area of 19,455 hectares located in the southeast of the prolific Sudbury Mining Camp in Northern Ontario; and the Hembruff Copper Property, which consists of 30 mining claims that covers an area of 6.64 square kilometers situated in the Elliot Lake, Ontario. The company was formerly known as MacDonald Mines Limited. MacDonald Mines Exploration Ltd. was founded in 1935 and is based in Toronto, Canada.