The Osborne underground copper-gold mine is located in the state of Queensland in northeastern Australia. It is 195 kilometers southeast of the inland town of Mount Isa and 720 kilometers west-southwest of the coastal city of Townsville.
Stoping methods vary depending on the ore profile and plunge within the deposit, with uphole benching producing the majority of production tonnes. Paste fill has been introduced to reduce hanging wall instability and allow greater recovery of the resource.
Mining operations commenced at the Inheritance satellite deposit at Trekelano in May 2006. Ore is mined by conventional open pit methods and transported to the Osborne mill