St Barbara Limited is a gold producer and explorer. The Company is engaged in mining and the sale of gold, mineral exploration and development. The Company segments include Leonora and Simberi. The Company's Leonora Operations include the Gwalia approximately 1.2 million tons per annum (Mtpa) processing plant and the Gwalia Underground mine. The Company's Simberi mine is on Simberi Island in Papua New Guinea, which includes gold and porphyry copper-gold targets. The Company's Simberi gold resources, reserves and mining operations are located in Mining Lease (ML) 136, which covers eastern half of Simberi Island, and the remainder of the island is covered by Exploration License (EL) 609, which also covers Tatau and Big Tabar Islands. Simberi focuses on epithermal gold in oxide and sulfide deposits. Simberi produced approximately 110,286 ounces of gold. The Company's Big Tabar Island is located approximately 20 kilometers south of Simberi, and over 30 kilometers north of Lihir Island.