John Harold Purkis

Petrus Resources, Inc. engages in the acquisition, exploration, and development of mineral and natural resource properties in Canada. It holds interest in Martison Phosphate Project, which consists of the Martison Phosphate Deposit and a planned phosphate mine, beneficiation plant, phosphoric acid plant and solid fertilizer production facility. The company was founded on March 22, 1994 and is headquartered in Calgary, Canada.

Inmet Mining Corp. explored and mined for copper, zinc and gold. The firm has three mining operations located around the world in Las Cruces, Pyhäsalmi and Cobre Panama. The company was founded on June 1, 1987 and was headquartered in Toronto, Canada.

Atna Resources Ltd. engaged in the exploration, development, and acquiring of mine precious metals, uranium, and mineral properties. The company was founded on May 30, 1984 and was headquartered in Golden, CO.

Petaquilla Minerals Ltd. operates as a mining company which focuses on the gold development projects. The company was founded on October 10, 1985 and is headquartered in Vancouver, Canada.

Part of First Quantum Minerals Ltd., Minnova, Inc. explores for mines and minerals.

Polaris Materials Corp. engages in the supply of construction aggregates. Its products include fine sand, crushed rock products, and concrete aggregates. The company was founded by Marco Antonio Romero and Roman Shklanka on May 14, 1999 and is headquartered in Vancouver, Canada.